JPH0718774B2 - Lens meter - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lens meter for measuring the refractive characteristics of eyeglass lenses or contact lenses.

(Prior Art) In recent years, refraction characteristics of eyeglass lenses, that is, spherical power,
A so-called automatic lens meter for automatically measuring the cylindrical refractive power, its axial angle, and the prism refractive power has been developed and put into practical use. However, also in this automatic lens meter, the so-called alignment work of matching the optical center or the optical action point of the lens to be measured with the measurement optical axis when measuring the refraction characteristics was still left to the manual work by the measurer.

(Problems to be Solved by the Invention) However, the manual alignment work is extremely complicated, and even if the angle of refraction characteristic measurement is automated and speeded up, the alignment work takes time, and eventually the measurement including the alignment work is performed. There was a problem that the time was almost the same as that of the conventional manual lens meter.

In addition, if the alignment work is inaccurate, the refraction characteristic measurement value will include an error, so the work is required to be accurate,
This made the alignment work more difficult.

(Object of the Invention) An object of the present invention is to provide a lens meter for automatically aligning a lens to be inspected without depending on a manual operation of a measurer.

The object of the present invention is also to test the lens after the end of the refractive characteristics,
It is an object of the present invention to provide a lens meter capable of automatically marking the optical center, the position of the optical action point, and, if necessary, the cylindrical axis angle, that is, the marking point.

(Means for Achieving the Purpose) An automatic alignment apparatus according to the present invention includes a measuring unit that measures the optical characteristics of an unprocessed or spectacle-framed lens to be inspected; a hand for holding the lens to be inspected; In order to move the lens to be inspected held by the hand along the X-Y direction substantially perpendicular to the photometric optical axis,
X- provided on the side opposite to the examiner position with respect to the photometric optical axis
A lens meter comprising: Y-direction moving means; and control means for controlling the XY-direction moving means based on measurement information of the optical characteristics of the lens to be measured from the measuring means.

The present invention also provides a measuring unit that measures the optical characteristics of the test lens that is unprocessed or has a spectacle frame; a hand that holds the test lens; and a photometric light that measures the test lens that is held by the hand. An XY direction moving means provided on the side opposite to the examiner position with respect to the photometric optical axis for moving along the XY direction substantially perpendicular to the axis; and configured to be movable on the measurement optical axis. A marking point unit having at least one marking mark; first control means for controlling the XY direction moving means based on measurement information of optical characteristics of the lens under test of the measuring means; Second control means for controlling the marking unit based on the measurement result of the optical characteristic of the lens to be measured by the measuring means, and marking at least the optical center position of the lens to be measured by the marking needle. Lens characterized by It is over data.

(Principle of the Invention) First, the principle of the present invention will be described. When the optical axis 1 of the lens to be inspected N coincides with the optical axis of the measurement optical system of the lens meter, the focal point of the lens to be inspected is at a point F on the optical axis L as shown in FIG. 1 (A). To position. However, the optical axis l of the lens to be inspected N
Is deviated from the optical axis of the lens meter, that is, when the optical center of the lens N to be inspected is deviated and aligned, as shown in FIG. 1 (B), the focus F of the lens N to be inspected is It is located off the optical axis L on the P plane perpendicular to the optical axis of the lens meter, which is separated by the focal length of the lens N to be inspected. As for the amount of deviation between the focal point F and the optical axis L of the lens meter, as shown in FIG. 2, an x _p -y _p rectangular coordinate system in which the origin O is the passing point of the optical axis L on the P plane can be considered. For example, it has P _x and P _y, which are generally treated as prism quantities.

Here, when the prism refraction amount is measured with the lens meter using the origin O of the P plane as a measurement point, P _x (for right eye lenses, the base out is the prism refracting power P _x ) and −P _y (for base up) The prismatic power is measured as P _y ). In this case, the optical center of the lens under test is located at the position (P _x , −P _y ). In the field of spectacles, the prism power, which is the amount of light deflection of an optical system, is 1 when the light beam deflects by 1 cm on a plane perpendicular to the initial direction for a distance of 1 m.
It is defined as ^Δ (prism diopter).

In order to perform alignment on the lens meter or to find the optical center of the lens to be inspected, it is necessary to know the geometric amount of how many centimeters the optical center deviates from the measuring point of the lens to be inspected. . For a lens to be inspected having only spherical refractive power, the refractive power of the lens to be inspected N is D and the prismatic power in the x direction is
_Assuming that the prism refractive power in the P _x and y directions is P _y , the geometric deviation amount between the measurement point O ₁ on the lens under test and the optical center H on the lens under test is h _x in the x direction, If we say h _{y in the} y direction, we have the relationship P _x = D · h _x , P _y = D · h _y (1) from the Prentice formula. From this, if we find h _x and h _y Becomes Therefore, in the lens meter, the deviation amounts h _x and h _y from the optical center position of the measurement point of the lens to be measured from the measured values of the spherical refractive power value and the prism refractive power value at an arbitrary point of the lens to be measured according to the equation (2). To calculate. Then, by moving the test lens by the shift amounts h _x and h _y , the optical axis L of the lens meter and the optical axis 1 of the test lens can be aligned.

Further, in the case of obtaining a point having an arbitrary prism amount, the prism amounts PX and PY are inputted prior to the alignment so as to be obtained as follows. When the lens N is measured at an arbitrary measurement point M and the prism measurement amounts are P _x and P _y , the point G to be aligned or marked is determined from the formula (2). Calculated as In addition, the lens to be inspected is not the Cartesian coordinate display of P _x and P _y (generally, the base direction is displayed in terms of base-in, base-out, base-up, and base-down), but the synthetic prism amount P. When given as a polar coordinate display in which the base direction is represented by an angle θ, P _x = P cos θ, P _y = P sin θ (4) After performing polar coordinate-orthogonal coordinate conversion, use the above method. Good. Further, when obtaining a point having an arbitrary prism amount, the prism amount P ₁ input before the alignment,
If θ ₁ is converted into Cartesian coordinates PX and PY in the same manner as in Expression (4), Expression (3) can be used as it is.

The above description can be applied only as an approximation when the lens to be inspected has only spherical power or when the cylindrical power is extremely small with respect to the spherical power. However, it is necessary to perform the following method in order to perform the alignment and the marking point more accurately when it has a cylindrical refractive power. That is, the refraction characteristic at the point G of the lens N to be measured, which is measured by the automatic lens meter, is
As shown in the figure, And Then, when these are rotated by the axis angle θ and converted into those related to the coordinate system in which the axis is horizontal, Becomes

Thereby, the point G and the optical center M on the coordinate of the lens system to be obtained are obtained.
_Let the geometrical eccentricity of and be h _Lx and h _Ly Then, the geometrical eccentricity amounts h _Lx and h _Ly are converted into the geometrical eccentricity amounts h _x and h _y on the automatic lens meter.

Becomes Therefore, the optical center of the lens to be inspected is at the position of M (hx, hy) on the automatic lens meter. Also,
In the case of a prism-processed lens or prism prescription, the lens movement amount for the alignment or marking of the optical action point that gives the desired prism amount (PX, PY) can be calculated using equation (5). And calculate sequentially.

However, when the denominators S and (S + C) in equation (6) are 0, the solutions h _Lx and h _Ly cannot be obtained. In reality, since the manufacturing error of the lens and the Prentice equation itself are approximate expressions, a correct solution cannot be obtained when S and (S + C) are close to zero. In this case, it is assumed that the change in the prism amount and the geometrical movement amount are proportional to each other, and the proportional constant is obtained, and the alignment is performed based on the proportional constant. That is,
In FIG. 6, moving from point A to point B, the prism amount at point A is (P _xa , P _ya ), and the prism amount at point B is (P _xb , P _yb ).
, The proportional constants K _x and K _y are Become, therefore, the movement amount x, y in the case of alignment from point B to the origin O _{is, x = K x · P xb} , the _{y = K y · P yb ......} (10).

Further, the subject lens may be aligned by a feedback method without using the Prentice formula. That is, when aligning the optical center of the lens to be measured with the optical axis of the lens meter, the amount of prism (P _x , P _y ) is measured every moment by the measuring system of the lens meter, and the amount of prism is P _x.
The test lens is moved so that = 0 and P _y = 0. In the case of prism processing or prism prescription, the prism measurement amount (P _x , P _y ) of the lens meter is the desired prism value (PX, P
Y), that is, P _x −PX = 0, P _y −PY = 0.

(Example) A lens meter which is an example of the present invention will be described below.

Schematic Configuration of Lens Meter FIG. 7 is a diagram schematically showing the configuration of a lens meter according to the present invention. This lens meter includes a light emitting section 1 and a detection optical system 2.
And the mark point M, the calculation control unit E for calculating the refraction characteristics of the lens to be measured based on the measurement data obtained from the detection optical system 2 and controlling the mark point M, and the calculation control unit E. The display device DP is configured to display the refraction characteristic value of the lens under test and the alignment state. Regarding the method for measuring the refraction characteristics of the lens under test of this lens meter, see JP-A-57
-199933 (Japanese Patent Application No. 56-85490) is described in detail. The marking point portion M includes a lens pressing portion 10, a marking point mechanism portion 30, and an alignment portion 50. Lens to be inspected 4
Are held by the alignment unit 50.

Alignment Unit The configuration of the alignment unit 50 will be described with reference to FIGS. 8 and 9. Flanges 506a and 506b are formed by projecting outward from both ends of the Y-axis base 506.
A Y-axis feed screw 505 and a Y-axis guide rail 507 are held between 06b. The Y-axis feed screw 505 is rotated by the Y-axis feed motor 502 attached to the flange 506b. This feed screw 505 is a flange portion 503a on one end side of the X-axis base 503.
It is screwed into the female screw. Furthermore, Y-axis feed guide rail
507 penetrates this flange portion 503a, and the X-axis base 5
The movement of the X-axis base 503 when the feed screw 505 is rotated by the rotation of the motor 502 is guided in cooperation with the rail 501 supporting the other end side of 03.

The X-axis base 503 has a flange 503 on the side opposite to the flange 503a.
As shown in FIG. 8 (C), it has an X-axis feed screw 508a and an X-axis guide rail 508 between the flanges 503a and 503b.
b and 508c are passed, and the feed screw 508a is the flange 503.
It is rotated by an X-axis feed motor 504 attached to a.
The feed screw 508a is screwed into the female screw portion of the X-axis table 520, and the feed guide rail 508b penetrates the X-axis table 520 to drive the motor 504 to move the X-axis table 520 via the screw 508a. To guide.

The X-axis table 520 has a flange 521 extending left and right,
A pulley 524 is rotatably supported on the left side surface of the flange 521 in FIGS. 8A and 8B, while an arm drive motor 522 having a pulley 523 is mounted on the right side surface thereof. A belt 525 is endlessly wound around both pulleys 523 and 524, and arms 526 and 527 are attached to the belt 525.
Are attached so as to move in opposite directions by the rotation of the belt 526.

The arms 526 and 527 are arranged so as to slide on arm guide rails 532 and 533 provided on the flange 521, respectively. The arms 526 and 527 are extended so as to intersect in the middle part, and hand vertical movement bases 550 and 551 are attached vertically to the respective tip parts. Hand up / down movement base 55
Guide rails 552a, 552b, 553a, 553b are provided on the flanges formed at the upper and lower ends of 0 and 551, respectively, and penetrate the hand bases 554 and 555. This allows the hand bases 554 and 555 to move freely in the vertical direction along the guide rails 552a to 553b.

Hand bases 554 and 555 each have a hand support base.
Hands 530 and 531 are attached via 556 and 557.
In addition, the respective hands 530 and 531 have male and female parts 558 and 559 so that the difference in height position is not too large when gripped.
Are attached to the hands 530, 531 to limit the relative height of the hands 530, 531. In addition, in the case of measuring glasses, in order to balance the lens weight of the person who has not measured, the hand vertical movement base 550, 551 and the hand base 554, 5
Extension coil springs 560 and 561 are passed between 55.

Next, FIG. 9 shows the configuration of the hands 530 and 531. Hand 53
Since the 0 and the hand 531 are formed so as to have a mirror-symmetrical shape with respect to each other, only the configuration of the hand 530 will be described. Hand base 5
54 is a hand piece support pedestal formed to project forward
Have 556. A support 602 extending upward is formed in the middle of the hand piece support base 556, and a guide hole 603 for guiding the rotation direction of the hand 530 is provided in the support 602. Guide pin 604
Are planted in the hand piece 600 through the guide hole 603.
Accordingly, the support 602 of the support base 556 can rotate the hand piece 600 around the guide hole 603.

The side surface of the hand 530 has a first contact surface 605a and a second contact surface 605b.
Both contact surfaces 605a and 605b respectively have, as shown in FIG. 9D, flanges 605e and 605f that project vertically, and intersect each other in a V shape. The outer side surface 605d of the upper surface portion 605c of the hand 530 is formed as a slope that opens outward as it goes forward. In addition, the hand support base
As shown in FIG. 9 (C), a pin 607 is planted on the upper surface of 556, and a spring 608 is fitted into the pin 607. Spring 60
The upper end of 8 is in contact with the lower surface of the hand piece 600.

As shown in FIG. 8A, the Z-axis table 572 supports the hand piece support arms 562 and 563 on the left and right, and the Z-axis table 572 is provided.
Bars 562, 563 to raise this as it rises
And an opening 572a through which the lens receiving member 541 of the detection optical system 2 of the lens meter can pass. Z
Guide rails 565 and 567 and a feed screw 568 are fixed to the lower surface of the shaft table 572. Guide rails 565 and 567 pass through a Z-axis base 569 that supports the Z-axis table 572, and a female screw portion 570 of the feed screw is pivotally supported.

The female screw portion 570 is configured to be rotated by the rotation of the Z-axis feed motor 514, and the Z-axis table 572 can be moved up and down by the rotation of the female screw portion 570. As the Z-axis table 572 moves up and down, the hands 530 and 531 also move the bars 562 and 563 to the hand base 55.
Moves up and down to make contact with 4,555.

Next, the mechanical operation of the alignment unit 50 having the above configuration will be described. First, the alignment operation for the unprocessed single lens will be described. When the lens 4 to be inspected is placed on the Z-axis table 572, the belt 525 is driven by the rotation of the arm drive motor 522. The pulley 523 is shown in FIG. 8 (B).
When the hands 530 and 531 are rotated clockwise at, since the arms 526 and 527 have a crossing structure, the hands 530 and 531 move in a direction in which the distance between them is narrowed, and the lens is held by holding the edge of the lens under test. . Here, the arms 526 and 527 have a crossed structure in order to reduce the size and weight of the arm base.

Subsequently, the lens pressing ring of the lens pressing unit 10 described below descends and presses the lens surface. When the Z-axis motor 514 is rotated in this state, the female screw portion 570 is rotated and the Z-axis table 572 is rotated.
Goes down. Therefore, the bars 562, 563 of the Z-axis table 572
The hands 530 and 531 supported in the height direction by the lens holder also descend while holding the lens in between, and the back surface of the hand is the lens receiving member.
It abuts on three lens holding pins 542 which form the measurement reference plane 540 of 541. The Z-axis table 572 is further lowered, but the lens is held on the lens holding pin 542 and the hands 530 and 531 are held.
Also moves away from the Z-axis table 572.

In this way, the lens held by the hands 530 and 531, the lens holding pin 542, and the lens holding ring is the Y-axis drive motor.
By rotating the Y-axis feed screw 505 by 502, the X-axis base 50
3 is moved in the Y direction. Further, the rotation of the X-axis drive motor 504 causes the rotation of the X-axis feed screw 508a to cause the rotation of the X-axis table.
When 520 is moved in the X direction, it is moved in the X direction. The main body for holding the lens under test is the lens holding pin.
The clamping force between the 542 and the lens retaining ring is responsible. Hand 530,
Reference numeral 531 acts so as to give a moving force in the X and Y directions of the lens at the time of alignment adjustment.

When the lens moves on the holding pin 542 in the X and Y directions, the hand pieces 600 and 601 holding the lens receive vertical force and rotational force. However, the vertical force is hand base 554, 5
55 Ga Hand up / down base Sliding on the bases 550 and 551, it escapes, and the rotation force is a guide pin with integrated hand
It can be released by rotating the hand piece with 604 as a rotation axis.

FIG. 10 is a diagram showing a method of holding glasses by the alignment unit 50. The inner side surface of the temple FT of the eyeglass frame FM is brought into contact with the outer side surfaces 605d of the hand pieces 600 and 601, and the lower end of the lens frame FR of the eyeglass frame FM is brought into contact with the hand bases 554 and 555 which are the eyeglass frame abutting surfaces. Let Positioning of the spectacle frame FM with respect to the hand is performed by the outer surface and the abutting surface. Since the outer side surface 605d has the inclined surface configuration as described above, the outer side surface 605d can be held even if the size of the lens frame FR of the frame or the temple FT attachment position is different for each frame.

Further, since the outer side surface 605d is inclined in the direction of the frame contact surfaces 554 and 555, it acts so that the lens frame FR of the frame always contacts the contact surfaces 554 and 555. The method of holding the lens with the spectacle frame on the lens receiving member 541 and the method of moving in the X and Y directions for alignment are the same as those of the unprocessed single lens described above.

To know the position of the virtual midpoint created by the hands 530 and 531,
As shown in FIG. 11, photo switches 701 and 702 are attached to the flange portions 503a of the X-axis base 520 and the Y-axis base 503. Above the respective photoswitches 701 and 702, in the device housing of a lens meter (not shown), two scales orthogonal to each other having light reflecting portions 705 and 706 and light absorbing portions 709 and 710 with the origins 703 and 704 as boundaries. Plates 707 and 708 are attached.

Lens Pressing Section and Mark Point Section FIG. 12 shows an embodiment of the lens pressing section 10 and the mark point section 30. The lens pressing portion 10 has a vertical movement base 101, and flanges 102 and 103 are formed on the vertical movement base 101 at intervals, and the guide rail 10 is provided between the flanges 102 and 103.
4 and 105 are passed in parallel. The rails 104 and 105 are inserted in the bearing portion 106a of the lens pressing table 106,
The bearing portion 106a has a linear bearing structure and is configured to smoothly move up and down along the rails 104 and 105 of the lens pressing table 106.

An L-shaped lens pressing column 107 is formed at the tip of the lens pressing table 106, and a lens pressing ring 108, which will be described later, is attached to the tip thereof. Also, the vertical movement base 101
A drive pulley 109 and a pulley 110 are rotatably attached to the. The drive pulley 109 is driven by a lens pressing up / down motor 111 attached to the base 101.

A steel belt 112 is stretched around the pulleys 109 and 110, and both ends thereof are fixed to the upper and lower side surfaces of the lens pressing table 106. This allows the drive pulley 10
When the motor 111 is rotated by the motor 111, the table 106 is moved up and down. In order to carry out the vertical movement of the table more smoothly and with a smaller driving force, in the present embodiment, the pins 113 planted on the side surface of the base 101 and the pins 113 planted on the side surface of the table 106 (not shown). Coil spring between
114 is stretched to maintain a balance with the weight of the table 106 side.

The marking point portion 30 is obliquely fixed on the lens pressing table 106. Two parallel guide rails 304 and 305 are provided between the flanges 302 and 303 of the base 301 of the marking point 30.
A marking point table 306 is slidably mounted on this rail. The bearing portion of the marking point table 306 also has a linear bearing structure similar to that of the lens pressing table 106 described above, and is configured so that it can be smoothly moved along the rails 304 and 305.

The base 301 has a drive booley 308 rotated by a motor 307 for moving the marking point table 306 and a pulley 309. A steel belt 310 is hung between the boolies and both ends thereof are fixed to the side surface of the table 306. Has been done. Thus, the rotation of the motor 307 causes the table 306 to move on the rails 304, 305.
You can move along. Pin 311 on the underside of table 306
Is also planted, and pins 312 are also attached to the bottom surface of the base 301.
A tension coil spring 313 for balancing with the table side is stretched between both pins.

A flange 315 is formed on the table 306, and a marking point unit 316 is rotatably supported on the flange 315. A pulley 318b is attached to the rotary shaft end of the marking needle unit 316.
Is installed. Further, a marking point unit rotating motor 321 is attached to the lower surface of the flange 315, and a drive pulley 318a is attached to the rotation shaft thereof. Both pulleys 31
A miniature rope 319 is hung between 8a and 318b, and both ends of the rope are fixed to springs 320 to obtain tension.

Further, an ink fountain 323 is attached to the lower end of the base 301 so as to correspond to the marking needle of the marking unit 316 when the marking table 306 is in the initial position. The ink fountain 323 has an ink storage member 324 made of felt or the like.

The lens holding ring 108 has a horseshoe-shaped holding pin holding plate 121, and holds a total of three lens holding pins 120 at the center and both ends of the holding plate. As shown in FIG. 13, the lens pressing pin 120 includes a lens pressing pin 123 having a collar 123a inserted into a hole 122 formed in a holding plate 121 and a cylinder 1
24 and a pressing spring 125 interposed between the flange 123a and the bottom surface of the cylinder, and the pin 123 is constantly pressed downward. With this configuration, when the lens 4 is held in cooperation with the lens holding pin 542 of the alignment section 50, the lens pressing pin 123 can press the lens even if the front surface of the lens has any curve.

FIG. 14 is a diagram showing the configuration of the marking point unit 316. The marking point unit 316 has three marking points needles 317 arranged in a straight line.
And a marking point needle holding member 318 that holds the same. The holding member 318 causes the unit 31 to rotate when the motor 321 rotates.
A cutout 319 is formed in the column 107 so that the column 107 is not prevented from rotating when the column 6 is rotated. The marking needle 317 includes a needle 320, a collar 321, and an electromagnetic induction coil 322, and is inserted into a cylinder 325 formed in a supporting member 318.

A magnet part 326 is incorporated in the upper part of the cylinder 325, and a pressing spring 3 is provided between the brim 321 and the bottom part of the cylinder.
27 intervenes and constantly acts to push the marking needle 317 upward.

The mechanical operation of the lens pressing unit 10 and the marking point unit 30 having the above-mentioned configurations will be described. In the initial state, the lens pressing table 106 is in contact with the flange 102 of the vertical movement base 101, and the marking point table 306 is in a position of contacting with the flange 302 of the base 301. The motor 111 is rotated counterclockwise by the holding command of the lens 4 to be inspected, and the lens pressing table 1
06 is lowered, whereby the mark point portion 30 and the lens pressing ring are simultaneously lowered. The lens pressing pin 120 of the lens pressing ring 108 contacts the lens 4 and the lens holding pin of the alignment unit 50
By holding the lens 4 in cooperation with 542, it is held.

Next, when the alignment of the optical axis 1 of the lens with the optical axis L of the lens meter and the measurement of the refraction characteristics are completed and marking is performed, the electromagnetic induction coil 322 of the marking unit 316 is first energized by a marking command. Then, the marking point needle 317 is lowered against the pressing spring 327, and the ink stored in the ink fountain 323 is attached to the tip of the needle 320. Then, the motor 307 is rotated counterclockwise to lower the marking point table 306 until it abuts the flange 303. This allows the marking point unit 316 to
It comes to the position of 316 'as shown by the imaginary line in FIG. At this time, the central marking needle 317 coincides with the optical axis L of the lens meter.

Next, the motor 321 is rotated to rotate the marking point unit at a desired rotation angle, that is, the cylindrical axis angle of the lens under test,
326 is energized and the needle 320 is struck on the lens 4 to form a mark on the lens surface.

Arithmetic control unit and operation sequence FIGS. 15 to 17 are block diagrams showing the configuration of the arithmetic control unit E for controlling the alignment-marking device described above, and FIG. 18 and FIG. 3 is a flowchart showing an operation sequence.

The configuration and operation of this arithmetic control unit will be described below according to the steps of the flowcharts shown in FIGS. 18 and 19. When the power switch is turned on, the initial value is set. First, the sequencer 1000 gives an operation command to the initial control circuit 1108 via the signal line 1309. As shown in FIG. 16, the initial control circuit 1108 inputs a signal to the OR circuit 1152 of the arm drive control circuit 1112 via the signal line 1212. The OR circuit 1152 is connected to the voltage generating circuit 11 via the signal line 1214.
By operating 49 and applying a positive voltage to the operational amplifier 1140, the arm drive motor 522 composed of a DC motor is rotated in the normal or reverse direction via the driver circuit 1132. That is, the voltage generation circuit 1149 is configured to apply a negative voltage to the operational amplifier 1140 to rotate the arm drive motor 522 in the reverse direction or the forward direction. Since the magnitudes of the positive and negative voltages of the voltage generation circuit 1149 determine the drive current of the arm drive motor 522, the drive current of the motor 522 is controlled by the logic signals provided to the signal lines 1214 and 1215, and the positive and negative voltages are controlled. Obtain the drive torque of.

Therefore, in the present embodiment, the voltage generating circuit 1149 is controlled by two signal lines, that is, the control line numbers 1214 and 1215. However, by increasing the number of control lines, the output voltage of the voltage generating circuit 1149 can be positive or negative. Multi-stage,
The driving torque obtained by the motor 522 can be set in multiple stages. This circuit configuration principle is based on a control circuit 1110, which will be described later.
1111 voltage generation circuits 1150, 1151 and operational amplifiers 1141, 11
The same applies to 42.

The voltage generation circuit 1149 receiving the signal from the signal line 1214 rotates the motor 522 clockwise toward the motor rotation shaft (hereinafter, this rotation direction is referred to as forward rotation) to open the hands 530 and 531 (hereinafter, referred to as forward rotation). Hereinafter, this voltage will be referred to as a positive voltage). The operational amplifier 1140 drives the motor 522 via the driver circuit 1132 to open the hands 530, 531 to the maximum extent. When the hands 530 and 531 are opened to the maximum, the voltage generated in the current detection resistor R ₁ activates the comparator 1143, and the DC output to the signal line 1202 opens the hands 530 and 531 to the sequencer 1000 to the maximum. Let us know.

Next, the initial control circuit 1108 sets the virtual center created by the hands 530 and 531 to the origin position (on the measurement optical axis of the lens meter).
In order to match with the above-mentioned photo switch 701, 702
According to whether the current position of the XY table is from the origin position or not, it is determined whether the photo switch 701 or 702 is ON or OFF. Then, the origin position (a position that turns OFF when the photo switches 701 and 702 are ON, O
If it is FF, the driver circuit 1135, 11 is moved through the signal lines 1310, 1311 so that it moves to the ON position).
The pulse is supplied from 36 pulse generators 1114 and 1115. When the photo switches 701 and 702 are switched, the pulse generator 1114,
1115 ceases to deliver pulses.

The initial control circuit 1108 includes driver circuits 1135 and 1136.
Signal to PLC 1000 to end pulse supply to PLC 1000
The end of operation is notified via 1380.

In case of unprocessed single lens FIG. 18 is a flowchart of alignment and marking operation in case of unprocessed single lens. The measurer sets the measurement mode switch 1402 to the unprocessed single lens side S.

Step 1-1: Place the lens 4 under test on the Z-axis table 532 and turn on the start switch 1401.

Step 1-2: The sequencer 1000 operates the OR circuit 1153 via the signal line 1201 (FIG. 16). At this time, the initial control circuit 11
Since the signal from 08 is not input to the OR circuits 1152 and 1153, only the OR circuit 1153 is operated, and the signal operates the voltage generation circuit 1149. At this time, the voltage generation circuit 1149 generates a voltage (this voltage is a negative voltage) for rotating the arm driving motor 522 counterclockwise, and the operational amplifier 1140
Inputs a negative voltage to the driver circuit 1132. Driver circuit
1132 rotates the motor 522 to sandwich the lens 4 to be inspected by the first contact surface 605a and the second contact surface 605b of the hands 530 and 531 respectively.

At this time, since the motor 522 is prevented from rotating due to the lens being sandwiched, the load current increases. The current is input to the operational amplifier 1140 as a voltage generated by the current detecting resistor R ₁ , the motor 522 is driven with a constant current, and acts to clamp the lens under test with a constant clamping force. Further, the comparator 1144 outputs DC to the signal line 1203 by the voltage value generated in the current detection resistor R ₁ to notify the sequencer 1000 that the lens under test is clamped.

Step 1-3: The sequencer 1000 which receives the DC from the comparator 1144 sends the DC to the signal line 1204 to operate the control circuit 1110 having the same configuration as the control circuit 1112. As a result, the lens presser vertical motor 111 is reversely rotated through the lens presser motor driver 1130, the lens presser table 106 is lowered, and the lens 4 to be inspected is pressed by the lens presser ring 108. This motor 111 is also driven with a constant current by the control circuit 1110, and its comparator 1145 outputs DC to the signal line 1206 to notify the sequencer 1000 that the lens 4 to be inspected is pressed.

Step 1-4: The sequencer 1000 which receives the DC from the comparator 1145
A signal is sent to the pulse generator 1116 via the signal line 1302, and at the same time, the mark driver circuit 1134 is activated. By the operation of this driver circuit 1134, the electromagnetic coil 3 of the marking point unit 316
26 is energized for about 0.2 sec, the marking point needle 317 is lowered and brought into contact with the ink fountain 323, and ink is supplied to the tip portion of the marking point needle 317.

The pulse generator 1116 rotates the Z-axis motor 514 by a predetermined number of pulses and lowers the Z-axis table 572 by a predetermined amount. Even if the lens 4 to be inspected descends as the Z-axis table descends, the control circuit 1110 of the lens pressing motor 111 operates so as to drive a constant current, so that the motor 111 rotates and the lens 111 remains constant during the lens descending. The pressing force acts to press the lens 4.

The lens 4 to be inspected is received by the lens holding pin 542 of the lens receiving member 541 during the descent of the Z-axis table, and is clamped between the lens pressing ring 108. When the Z-axis table descends by a predetermined amount, that is, when the pulse generator 1116 finishes generating a predetermined number of pulses, the sequencer 10 is transmitted through the signal line 1320.
Notify the end of Z-axis table lowering to 00.

Step 1-5: The sequencer 1000 commands the detection processing unit 1101 to measure the refractive characteristics of the lens under test. The detection processing unit 1101 includes a detector 1103.
The spherical power S, the cylindrical power C, the cylindrical axis angle θ, and the prism amounts P _x and P _y of the lens to be tested are calculated based on the data from 1.

Step 1-6: The detection processing unit 1101 compares the refraction characteristics of the lens under test with the comparator 1104.
Output to. When the lens to be inspected requires a prism processed lens or a prism prescription, the keyboard 1121 outputs the prism amount (P _x , P _y ) to the comparator 1104. keyboard
When the prism amount to 1121 is input in the polar coordinate system (p, θ), the coordinate converter 11 including a microcomputer, etc.
The value of ( _Px , _Py ) is converted by the expression (4) by 22 and is output to the comparator 1104.

The comparator 1104 compares the input prism amount with the predetermined allowable prism amounts P _x ′, P _y ′, P _x ′ <| P _x |,
P _y ′ <| P _y ｜ (P _x ′ <| when PX and PY are input
If P _x −PX |, P _y ′ <| P _y −PY |), a pulse is output to the signal line 1303, this is input to the sequencer 1000, and the process proceeds to step 1-7. _{P x '> | P x |} , P y'> | P y | (PX, if PY is _{input, P x '> | P x} -PX |, P y'> | P y -P
If Y |), a pulse is output to the signal line 1323 and input to the sequencer 1000, and the process proceeds to step 1-9.

Step 1-7: The arithmetic circuit 1102 including a microcomputer,
Based on the data from the detection processing unit 1101, the above-described calculation formula is used to calculate the eccentricity amounts h _x and h _y of the optical center.

Step 1-8: The eccentricity amounts h _x and h _y from the arithmetic circuit 1102 are input to the selector circuits 1105 and 1106, respectively. Upon receiving DC from the signal line 1303, the sequencer 1000 causes the selector circuits 1105 and 1106 to selectively operate via the signal lines 1304 and 1305, and inputs the eccentric amounts h _x and h _y to the pulse generators 1114 and 1115. Pulse generator 111
Reference numerals 4 and 1115 convert the input eccentricity amounts h _x and h _y into pulse numbers, and then the pulses are X-valued through driver circuits 1135 and 1136.
It is input to the shaft motor 504 and the Y-axis motor 502, and these are driven to move the lens 4 to be inspected sandwiched by the hands 530 and 531 in the X-axis direction or the Y-axis direction. Pulse generator 1114, 11
When the 15 finishes outputting the pulse, the signal line 1321,
Notify sequencer 1000 via 1322.

Step 1-9: The sequencer 1000 inputs a command signal via the signal line 1208 to the control circuit 1111 having the same circuit configuration as the control circuit 1112 described above. The voltage generation circuit 1151 of the control circuit 1111 receives the pulse from the sequencer 1000, applies a negative voltage to the operational amplifier 1142, and causes the motor 307 for moving the marking point portion to rotate in the reverse direction via the driver circuit 1131. As a result, the marking point table 306
Is moved down and moved to a predetermined position (a position shown by an imaginary line in FIG. 12A) where the center marking needle 317 of the marking unit 316 matches the measurement optical axis L of the lens meter. Mark unit
Completion of movement of 316 is notified by inputting an ON signal of comparator 1147 to sequencer 1000.

Step 1-10: Upon receiving the signal from the comparator 1147, the sequencer 1000 transfers the cylindrical axis angle value θ of the lens under test measured by the detection processing unit 1101 to the pulse generator 1113 via the signal line 1307. The pulse generator 1113 converts the input angle value θ into the number of pulses, and then rotates the mark point rotating motor 3231 by the number of pulses via the driver circuit 1133. The rotation of the motor 321 causes the marking needle 317 of the marking unit 316 to rotate about the measurement optical axis L by the angle θ. When the pulse generator 1113 finishes outputting the above-mentioned number of pulses, it inputs the mark point unit rotation end signal to the sequencer 1000 via the signal line 1324.

Step 1-11: When the sequencer 1000 receives the mark point unit rotation end signal, it again activates the mark point driver circuit 1134 via the signal line 1306. This driver circuit 1134 allows the marking point unit 31
The electromagnetic coil 326 of No. 8 is energized for about 0.2 sec, and the marking needle 317 is lowered to contact the lens 4 to be inspected. This enables the marking needle
The ink adhered to the tip of 317 adheres to the lens surface, and the marking point is completed.

Step 1-12: The sequencer 1000 outputs a command signal to the initial control circuit 1108 via the signal line 1309 in order to return the XY table to the initial position. In the initial control circuit 1108, the photo switches 701 and 702 installed on the XY axis base are currently ON.
The direction of the origin is determined by whether it is OFF or OFF, and pulses are supplied from the pulse generators 1114 and 1115 to the driver circuits 1135 and 1136 via the signal lines 1310 and 1311, and the photoswitches 701 and 702 are switched. Stop supplying pulses at this point. Next, the initial control circuit 1108 notifies the sequencer 1000 via the signal line 1380.

Step 1-13: The PLC 1000 that received the XY table origin return signal
The voltage generation circuit of the control circuit 1110 is operated via the signal line 1205. The voltage generation circuit 1150 applies a positive voltage to the operational amplifier 1141 to rotate the lens-holding motor 111 positively to raise the lens-holding table 106. It is detected when the ON signal of the comparator 1146 is input to the sequencer 1000.

Step 1-14: The sequencer 1000 supplies the same number of pulses for normal rotation as those generated in Step 1-4 to the Z-axis drive motor 514 via the driver circuit 1137, and at the same time generates a pulse via the signal line 1308. A pulse for reverse rotation of the cylinder axis angle θ is generated in the device 1113. The motor 321 for rotating the marking point is the driver circuit 1
Upon receiving the reverse rotation plow of the pulse generator 1113 via 133, the pulse generator 1113 is reversely rotated by the number of pulses to return the mark point unit to the original reference angular position. When the sequencer 1000 receives the signal indicating the end of rotation return of the marking point unit from the pulse generator 1113, the sequencer 1000 inputs the signal to the voltage generation circuit 1151 via the signal line 1209.

The voltage generation circuit 1151 inputs a positive voltage to the operational amplifier 1142, rotates the marking point moving motor 307 in the positive direction, raises the marking point table 306, and restores the initial position. When the recovery is completed, the ON signal of the comparator 1148 is sent to the sequencer 1000 via the signal line 1211.
It is detected by inputting to. On the other hand, Z-axis table 50
The pulse generator 1116 of 1 sets the Z-axis table 501 on the measurement reference plane 54.
When the pulse for raising to the same height as 0 is generated, the sequencer 1000 is notified of the end of the Z-axis table raising through the signal line 1320.

Step 1-15: When the sequencer 1000 receives the signals from the signal lines 1211, 1320, it operates the OR circuit 1152 via the signal line 1200, and the motor 52
Rotate 2 forward to open hands 530 and 531 and inspect lens 4
Remove the clamp. Comparing the open operation of the hand is 1143
Is detected by the sequencer 1000 via the signal line 1202.
Will be notified.

Step 1-16: The sequencer 1000 instructs the detection processing section 1101 to display the refractive characteristic result of the lens 4 under test on the display section DP. If necessary, the printer PR is made to print out the result.

Step 1-17: The measurer removes the lens to be inspected mounted on the Z-axis table 532.

In the above description, the marking point moving motor 307 is constituted by a DC motor, but it may be constituted by a stepping motor, and the Z-axis motor 514 is constituted by a DC motor by using a position detection switch. You can also

Case of Lens with Eyeglass Frame Next, the alignment-marking operation of the lens with eyeglass frame will be described based on the flowchart shown in FIG.

The measurer switches the measurement mode changeover switch 1402 and sets it to the spectacle frame side F.

Step 2-1: The sequencer 1000 connects the signal line 13 to the initial control circuit 1108.
Send a signal through 09. Upon receiving this signal, the initial control circuit 1108 inputs the signal to the OR circuit 1153 via the signal line 1213 shown in FIG. The OR circuit 1153 is a voltage generation circuit.
1149 is operated, a positive voltage is input to the operational amplifier 1140, and the driving motor 522 is positively rotated for about 0.5 sec through the driver circuit 1132, and the interval between the hands 530 and 531 is reduced to the middle.

Step 2-2: The measurer hangs the spectacle frame FM on the hands 530 and 531. At this time, the lower line of the lens frame FR of the frame FM is hung so as to come into contact with the frame abutting surface. After setting the frame in this way, start switch 1401
Turn on.

Step 2-3: Upon receiving the ON signal of the start switch 1401, the sequencer 1000 inputs a signal to the OR circuit 1152. The OR circuit 1152 is
The voltage generation circuit 1149 is operated to supply a negative voltage to the current amplifier 1140, and the motor 522 is rotated in the reverse direction to open the hands 530 and 531. The outer side surfaces 605d of the hands 530 and 531 contact the temples FT of the frame FM and hold the frame FM on the hands. Note that the frame holding control of this is performed by constant current driving as in the case of the unprocessed lens described above.

Step 2-4L: When the sequencer 1000 detects the frame holding by the input of the signal from the comparator 1143, it outputs a command signal to the frame setting control 1120 to set the left eye lens of the frame FM on the measurement optical system 1103. To order. 17th
The figure shows the configuration of this frame installation controller 1120.

First, the sequencer 1000 outputs a read signal to the left ball setting value register 160 via the signal line 1350. The left-eye set value register 1160 outputs to the driver circuit 1135 a pulse number corresponding to a half value of the PD of the standard eyeglass frame stored therein, that is, a “Half PD value”. Driver circuit
The 1135 reversely rotates the X-axis motor 504 by the number of pulses, moves the X-axis table 520 to the right, and positions the left-eye lens above the lens receiving member. When the output of the number of pulses is completed, the left ball setting value register 1160 informs the sequencer 1000 of that fact through the signal line 1351.

Step 2-5L: When the sequencer 1000 receives the pulse output end signal of the right ball setting value register 1160, it gives an instruction to the pulse generator 1116, and reversely rotates the Z-axis motor 514 with a predetermined number of pulses from this pulse generator. , Z-axis table 572 is lowered to the lowest position. Accordingly, the left eye lens of the spectacle frame FM is placed on the lens holding pin 542 of the lens receiving member 541.

Step 2-6L: The lens retaining ring 108 retains the left eye lens by cooperating with the lens receiving member 541 by the same operation as in the above Step 1-3.

Step 2-7L: Alignment of the unprocessed lens described above-Marking step 1-
5. Perform the same operations as in Steps 5-11. However, the pulse from the pulse generator 1114 for PD measurement, which will be described later, is always counted by the left eye counter 1163 of the frame installation controller 1120.

Step 2-8L Perform the same work as in 1-13 above.

Step 2-9L The sequencer 1000 outputs a command signal to the initial control circuit 1108 via the signal line 1309. The initial control circuit 1108 checks the state (ON or OFF) of the Y-axis photo switches 701 and 702, and generates a pulse to the driver circuit 1136 via the signal line 1311 so that the Y-axis table 503 moves in the Y-axis origin direction. Pulse is supplied from the instrument 1115. When the photo switch 702 is switched at the origin, the pulse supply is stopped, and the initial control circuit 1108 notifies the sequencer 1000 via the signal line 1308.

Step 2-10L: When the sequencer 1000 is notified that the pulse generator 1115 has finished supplying pulses, the sequencer 1000 then performs the same operation as 1-14.

Step 2-11L: When the sequencer 1000 receives the notification of the end of the Z-axis table rising from the pulse generator 1116, it performs the same operation as in Step 1-5.

Step 2-12L: The detection processing unit 1101 compares the refraction characteristics of the left-eye lens with the comparator 1104.
Output to. The comparator 1104 compares the input prism amount with a predetermined permissible prism amount P _x ′, and P _x ′ <| P _x
If │ (when PX is input, P _x ′ <| P _x −PX |), the sequencer 1000 outputs a pulse to the signal line 1303.
To step 2-13L. P _x ′> ｜ P _x ｜ (PX
Is input, if P _x ′> | P _x −PX |),
A pulse is output to the signal line 1323 and input to the sequencer 1000, and the process proceeds to step 2-15L.

Step 2-13L: The arithmetic circuit 1102 calculates the eccentricity amount h _x from the optical center based on the data from the detection processing unit 1101.

Step 2-14L: The eccentricity amount h _x is input from the arithmetic circuit 1102 to the pulse generator 1114. The pulse generator 1114 outputs X through the driver circuit 1135.
The shaft motor 504 is driven.

Step 2-15R: This completes the measurement of the left eye lens. The number of pulses generated by the pulse generator 1114 has been counted by the counter 1163 so far, and in order to stop the pulse when proceeding to step 2-15R, the sequencer 1000 sends a counter end signal to the counter 1163 via the signal line 1357. To enter. When the counter 1163 is stopped, the right lens set value register 1160 of the frame installation controller 1120 is instructed via the signal line 1350, and the number of pulses corresponding to all the PD values of the standard eyeglass frames stored therein is set to the driver circuit 1135. Output to. This causes the driver circuit 1135 to rotate the X-axis motor 504, and the X-axis table 5
20 to the left and move the right eye lens to the lens receiving member 541
Position it up.

Steps 2-16R to 2-19R: Alignment-mark points described above Steps 2-11L to 2-1
Perform the same work as 4L. However, the pulse from the pulse generator 1114 for PD measurement is always counted by the counter 1162 for the right eye lens of the frame installation controller 1120.

Step 2-20R: The sequencer 1000 inputs a counter end signal to the counter 1162 via the signal line 1356. The counter 1162 is stopped and the same work as in step 2-5L is executed.

Step 2-21R: Perform the same operation as in Step 2-2L described above.

Step 2-22R: Perform the same work as 2-7L described above.

Step 2-23R: Perform the same operation as 2-8L described above.

Step 2-24R: Perform the same operation as 2-9L described above.

Step 2-25R: Perform the same operation as 2-10L described above.

Step 2-26: The sequencer 1000 commands the pulse generator 1114 to supply a pulse so that the X table returns to the origin position. The pulse generator 1114 drives the X-axis drive motor 504 via the driver circuit 1135. When the photo switch 701 at the origin of the X-axis is switched, the sequencer 1000 commands the pulse generator 1114 to stop the pulse supply.

Step 2-27: The same work as the above step 2-1 is executed.

Step 2-28: The sequencer 1000 commands the detection processing unit 1101 to display the refractive property results of the left and right eye lenses on the display DP, and also commands the adder 1164 of the frame installation controller 1120 to move the left eye. The count values of the lens counter 1162 and the right-eye lens counter 1163 are added. PD converter 1165
Converts the addition result of the adder 1164 into a PD value and displays the result on the display unit DP. In addition, the above measurement results are printed out by the printer PR as needed.

(Advantages of the Invention) An automatic alignment apparatus that automates alignment work, which has conventionally required a lot of work time due to complicated manual work, and has been difficult to obtain high matching accuracy, and does not require any manual work by a measurer. And an automatic marking device having the same can be obtained. That is, according to the present invention, there is an effect that the alignment work does not require any skill and the highly accurate alignment work can be performed in a short time.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing the relationship between the lens to be inspected and the measurement optical axis of the lens meter, FIGS. 2 to 4 are schematic diagrams showing the relationship between the prism refracting power and the eccentric position, and FIG. FIG. 6 is a schematic diagram showing the relationship between the radial line and the refractive power and the amount of deviation, FIG. 6 is an explanatory diagram of the alignment operation, FIG. 7 is a schematic diagram showing the configuration of the lens meter according to the present invention, and FIG. An example is shown, (A) is a plan view, (B) is a front view,
(C) is a sectional view taken along the line CC 'shown in (A), FIG. 9 shows the structure of the hand portion, (A) is a plan view, (B) is a front view,
(C) is a left side view, (D) is a sectional view taken along the line DD 'of (A),
FIG. 10 is a diagram showing the relationship between the two when the eyeglass frame is placed on the hand part, FIG. 11 is an explanatory diagram showing the relationship between the photoswitch and the scale plate, and FIG. 12 is the lens pressing part and the marking point part. Showing the configuration of (A) is a right side view, (B) is a plan view,
(C) is a front view, FIG. 13 is a longitudinal sectional view showing the structure of the lens pressing pin, FIG. 14 shows the relationship between the marking unit and the lens pressing ring, (A) is a front view, and (B) is a front view. FIG. 15C is a longitudinal sectional view showing the structure of the marking needle, FIG. 15 is a block diagram showing the structure of the arithmetic control unit E, and FIG. 16 is the control circuits 1110 to 1112.
FIG. 17 is a block diagram showing the configuration of FIG. 17, FIG. 17 is a block diagram showing the configuration of the frame installation controller 1120, FIG. It is a flowchart figure which shows the alignment-mark in the case of a spectacle frame. 101 …… Vertical movement base 106 …… Lens presser table 108 …… Lens presser ring 111 …… Lens presser table Vertical movement motor 306 …… Marking point table 316 …… Marking point unit 317 …… Marking needle 321 …… Marking Point unit rotary motor 502 …… Y-axis motor 503 …… X-axis base 504 …… X-axis motor 505 …… Y-axis feed screw 506 …… Y-axis base 508a …… X-axis feed screw 514 …… Z-axis motor 520… … X-axis base 521 …… Flange 522 …… Arm drive motor 526,527 …… Arm 530,531 …… Hand 550,551 …… Hand up / down movement base 554,555 …… Hand base 556 …… Hand single support base 560 , 561 ...... Spring 562, 563 ...... Bar 572 ...... Z-axis table 600 ...... Hand piece 605a ...... 1st contact surface (inside surface) 605b ...... 2nd contact surface (inside surface) 605d ...... Outer Side 1000 …… Sequencer 1103 …… Measurement optical system and detector 1108 …… Initial control response 111 0 to 1112 …… Control circuit 1113 to 1116 …… Pulse generator 1130 to 1137 …… Driver

Claims (4)

[Claims] 1. A measuring unit for measuring the optical characteristics of an unprocessed or lens-inspected lens to be inspected; a hand for holding the lens to be inspected; a photometric measurement of the lens to be inspected held by the hand. In order to move along the XY direction which is substantially perpendicular to the optical axis,
X- provided on the side opposite to the examiner position with respect to the photometric optical axis
A lens meter comprising: Y-direction moving means; and control means for controlling the XY-direction moving means based on measurement information of optical characteristics of the lens to be measured from the measuring means. 2. The lens meter according to claim 1, wherein the hand holds the lens to be tested by moving two arms in parallel. 3. Measuring means for measuring the optical characteristics of an unprocessed or lens-inspected lens under test; a hand for holding the lens under test; and a photometric light for the lens under test held by the hand. An XY direction moving means provided on the side opposite to the examiner position with respect to the photometric optical axis for moving along the XY direction substantially perpendicular to the axis; and configured to be movable on the measurement optical axis. A marking point unit having at least one marking mark; first control means for controlling the XY direction moving means based on measurement information of optical characteristics of the lens under test of the measuring means; Second control means for controlling the marking unit based on the measurement result of the optical characteristic of the lens to be measured by the measuring means, and marking at least the optical center position of the lens to be measured by the marking needle. Lens lens characterized by Data. 4. The lens meter according to claim 3, wherein the hand holds the lens under test by moving two arms in parallel.