JPH0320702B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a marking device for a lens meter that measures the spherical and cylindrical refractive powers of eyeglass lenses or contact lenses. More specifically, in an automatic lens meter that automatically measures the refractive power of eyeglass lenses, etc., the optical center of the eyeglass lens, etc. is calculated and automatically marked based on the measured prism refractive power. This invention relates to an automatic marking device.

In recent years, the spherical refractive power, cylindrical refractive power, and their axial direction of eyeglass lenses, etc. (hereinafter, when these are expressed collectively, they are simply referred to as refractive characteristics), and the prismatic refractive power and their base direction (hereinafter, these are collectively referred to as A so-called automatic lens meter that automatically measures prism characteristics (when expressed simply as prism characteristics) has been developed and put into practical use. These automatic lensmeters are very convenient in that they can automatically measure the refractive power of eyeglass lenses, etc.
Regarding the optical center position of the test lens and the axial marking of the cylindrical refractive power, that is, the marking point,
At present, it is not much different from conventional telescopic or projection type lensmeters, in which an examiner manually observes and measures while looking through an eyepiece. That is,
With conventional lensmeters, when marking the optical center and cylindrical axis of a lens to be tested, it is first necessary to align the optical axis of the lens to be tested with the optical axis of the lensmeter. A marker indicating the optical center of the detection lens is projected. As another means of indicating the alignment between the optical axis of the lens under test and the optical axis of the lensmeter, some automatic lensmeters use indicator lamps, but in either case, alignment operations require a great deal of effort. This takes time and may cause alignment errors, making it impossible to improve the accuracy of the markings, which in turn leads to errors in the processing and alignment of the glasses.
Furthermore, if the lens to be tested is an astigmatic lens, the cylindrical axis of the lens must be aligned with the direction in which the three hands on the marking part are arranged, so it is necessary to rotate the lens to be tested. This operation and the operation of matching the cylindrical axes are not only time-consuming, but also pose a risk of errors in accuracy, which pose problems in adjusting and processing eyeglass lenses. In addition, when the test lens is a lens processed with a prism, the test lens generally has a predetermined prism refractive power and has an optical center shifted from the geometric center of the test lens in a predetermined base direction. ing. With such prism lenses, the point to be marked is not the optical center but the geometric center, and with conventional lensmeters, the corona image that shows the optical center of the lens under observation is placed within the observation field. It is necessary to align the lens to be examined so that it is observed with a predetermined prism diopter shifted from the center of the visual field in the direction of the prism base. In this case, with conventional automatic lens meters, it is necessary to convert the coordinates of the alignment of the prism lens, which must rely solely on calculations and is prone to calculation errors, and the results after conversion are displayed on the display. This resulted in a very time-consuming operation in which the lens under test had to be moved left, right, up, and down to find the alignment position.

In order to solve the above-mentioned drawbacks of the mark operation of the conventional automatic lensmeter, the present invention has been developed to analyze the refractive power of the prism measured by the lensmeter, its base direction, and the refractive characteristics of the lens to be tested. Automatic marking that calculates the optical center of the lens and the cylindrical axis angle for lenses for astigmatism, moves the marking needle or lens holder to the calculated position, and marks the optical center and cylindrical axis of the lens to be tested. The purpose of this invention is to provide a point device.

Another purpose is to set a predetermined prism refractive power and base direction (hereinafter collectively referred to as the prism amount) in advance even if the test lens is a prism lens and is set at an arbitrary position. For example, it is an object of the present invention to provide an automatic marking device that can calculate the difference between the prism characteristic measurement value of the lens to be tested and the set amount of prism, and automatically mark the geometric center.

That is, the structural feature of the present invention is that in a marking device that marks the optical center or geometrical center of a lens to be tested of a lens meter that automatically measures the refractive properties and prism properties of the lens to be tested,
A marking means consisting of a test lens holder movable relative to each other and a marking section having at least one printing needle, and information on the refractive properties and prism properties of the test lens from the measurement section of the lens meter. A detecting means for detecting, a calculating means for calculating the optical center position of the test lens from the information of the detecting means or a geometric center position from the prism amount inputted in advance, and a marking means for using the information from the calculating means, or drive signal means for converting into a drive signal for driving the lens pedestal; and information from the drive signal means to cause the marking means and the marking needle to mark the optical center position or the geometrical center position. and a driving means for driving the marking means. Therefore, according to the present invention, there is no need to move the lens itself to set the optical center to be marked on the optical axis (position of the marking needle) of the lensmeter as in the conventional method. For any lens to be tested, the mark can be marked by moving the marking part or lens holder to the optical center to be marked based on the information automatically calculated from the refractive characteristic measurement results of the lens meter. There is no marking error in the optical center or cylinder axis angle due to movement of the lens to be tested, unlike in the past. In addition, in the case of prism-processed lenses, by simply setting the amount of prism in advance, the geometric center to be marked can be determined from the refractive characteristics of the lens to be tested at any point. It is easier because the lens holder is moved to mark the mark.

Next, the principle of the present invention will be explained. When the optical axis l of the test lens N coincides with the optical axis of the measurement optical system of the lensmeter, the focal point of the test lens is formed at a point P on the optical axis, as shown in Figure 1a. Ru. However, the optical axis l of the lens under test is the optical axis L of the lens meter.
If the optical center of the test lens N is misaligned, as shown in Figure 1b, the focus P of the test lens N will be separated by the focal length of the test lens N. and is formed on the P plane perpendicular to the optical axis of the lensmeter. The amount of deviation between this focal point P and the optical axis L of the lens meter is
As shown in Fig. 2, if we consider an x, y orthogonal coordinate system with the origin O as the passing point of the optical axis L on the P plane,
It has quantities Px and Py, which are generally treated as prism quantities. Now, when measuring the amount of prism refraction with a lens meter using the origin O of the P plane as the measurement point, the prism refraction power Py is Px (Base in if it is a lens for the right eye, the amount of prism refraction is Px), -Py Base down is the prism refraction power Py ) is measured. In this case, Px−Py
The optical center of the lens to be tested is located at the position where . In reality, the prism refractive power allows a ray of light parallel to the optical axis to enter an optical system, and the ray that has passed through the optical system leaves the optical system at a position 1 m away from the point of incidence of the incident ray. A case where there is a deviation is defined as a 1 prism diopter. That is, the prism refractive power is the amount of light beam deflection of the optical system. The optical center of the test lens that we mark is geometrically relative to the measurement point of the test lens.
We need the geometric length amount that indicates the cm deviation. For a test lens having only spherical refractive power, as shown in FIG. 3, the refractive power D of the test lens N,
When the prism refractive power in the x direction is Px and the prism refractive power in the y direction is Py, the amount of geometric deviation between the measurement point O1 on the test lens and the optical center H on the test lens is the x direction. If we set hx in the y direction and hy in the y direction, generally there is a relationship of Px=D・hx, Py=D・hy…(1). If we find hx and hy from this, hx=Px/D, hy=Py/D...(2). Therefore, in the lens meter, the amount of deviation hx, hy from the optical center position of the test lens is calculated from the measured values of the spherical refractive power value and the prism refractive power value at an arbitrary point of the test lens using equation (2). death,
If the measurement point is shifted by hx and hy from the optical axis of the lens meter, that point becomes the optical center of the lens to be tested. In addition, when marking the geometric center of the test lens N that has been processed with a prism in advance,
As shown in FIG. 4, the geometric center G has a prism distance of Px and PY from the optical center O. When this test lens N is measured at an arbitrary measurement point M, and the prism measurement quantities are Px and Py, the geometric center G to be marked is calculated from equation (2): hx = Px - Px/D , hy=P _Y −Py/D (3) (where D is the refractive power of the test lens). Also, this test lens is Px,
Cartesian coordinate representation P _Y (generally Base ln, Base
The base direction is displayed using the terms Out, Base Up, and Base Down. ), but the composite prism amount P
If it is obtained as a polar coordinate display in which the base direction is expressed as an angle θ, the above method can be used after performing the polar coordinate-orthogonal coordinate transformation as follows: PX=P cos θ, PY=P sin θ (4).

In the explanation so far, the refractive power of the test lens is calculated using D as an approximation in the case where only the spherical refractive power or the cylindrical refractive power is extremely small compared to the spherical refractive power. However, in order to more accurately mark the points, use the following method to calculate from the spherical refractive power, cylindrical refractive power, and their axis angles measured by an automatic lens meter, and the pure prism measurement quantity unrelated to these quantities. .

Assuming that the refractive properties of the test lens measured by an automatic lens meter are: spherical refractive power S cylindrical refractive power C cylindrical axis angle θ horizontal prism amount P _X vertical prism amount P _Y , as shown in Figure 5, The prismatic effect sPx, sPy of the spherical component of the lens and the prismatic effect cPx of the cylindrical component due to the deviation of the optical center of the lens,
cPy is respectively sPx=s・hx sPy=S・hy cPx=C・MK・sinθ cPy=C・MK・cosθ (a). Here, =・cosθ = (hy+hx・tanθ)・cosθ =hy・cosθ+hx・sinθ, therefore, cPx=C・(hy・cosθ+hx・sinθ) sinθ cPy=C・(hy・cosθ+hx・sinθ)・cosθ …(b ) The total prism effect Px, Py of a lens is a combination of its spherical component prism effects sPx, sPy and its cylindrical component prism effects cPx, cPy, so from equations (a) and (b) above, Px= sPx + cPx = S・hx+C・(hy・cosθ+hx・sinθ)・
sinθ = hx(S+C・sin ² θ)+hy・C・sinθ・
cosθ Py〕sPy+cPy = S・hy+C・(hy・cosθ+hx・sinθ)・
cosθ = hx・C・sinθ・cosθ+hy(S+C・
cos ² θ) …(c) From this, hy・C・sinθ・cosθ/hy(S+C・cos ² θ)= Px−hx(S+C・sin ² θ)/Py−hx・C・sinθ・cosθ Py・C・sinθ・cosθ−hx・C ²・sin ² θ・cos ² θ = Px (S+C・cos ² θ)−hx (S ² +S・C+
C ²・sin ² θ・cos ² θ) ∴hx＝
Px(S+C・cos ² θ)−Py・C・sinθ・cosθ/S(S
+C) ...(d) From equation (c), hy=Px-hx(S+C・sin ² θ)/C・sinθ・cosθ. Then, by substituting equation (d) into the above equation, the molecule becomes Px・S(S+C)−(S+C・sin ² θ)[Px(S+
C・cos ² θ) −Py・C・sinθ・cosθ =Px・S(S+C)−Px(S ² +S・C+C ²・
sin ² θ・cos ² θ) +Py・C・sinθ・cosθ(S+C・sin ² θ) =Py・C・sinθ・cosθ(S+C・sin ² θ) −Px _p・C ²・sin ² θ・cos ² θ, and the denominator is S(S+C)・C・Sinθ・cosθ, so in the end hy=
Py(S+C・sin ² θ)−Px・C・sinθ・cosθ/S(S
+C) ...(e). From the above equations (d) and (e), the optical center O of the test lens is: Calculated by

Embodiments of the present invention will be described below with reference to the drawings. In the first embodiment of the marking device of the lens meter, as shown in FIG.
consists of an ink pen 6 and a solenoid 19, and Y
- It is supported by the direction arm 2 and driven in the Y direction by a Y-AXIS motor 16. Further, the Y-direction arm 2 is supported by the X-direction arm 3, and is configured to be driven on the X-direction arm 3 by an X-AXIS motor 17. 4
5 is a lens to be tested, 5 is a lens support stand, and 7 is an optical axis of the measuring device. Reference numeral 8 denotes a detection processing section of an automatic lens meter (computing lens meter), which is configured to display and output the cylindrical degree, astigmatic degree, astigmatic axial degree, and prism refractive power of the tested lens.

The measurement is performed in a state where the optical center of the lens 4 to be tested and the instrument axis 7 of the automatic lens meter do not match,
The detection processing unit 8 sets the astigmatism axis angle a to 804, the lens diopter D to 803, and the prism refractive power Px.
is outputted to 802, the prism refractive power Py is outputted to 801,
And the measurement end signal is sent to the program counter 20.
Suppose you output to . Program counter 20
is in charge of the entire sequence, and upon receiving the measurement end signal, sends a signal to the initial control circuit 13 in order to move the marking mechanism P, which had been retracted so as not to block the measurement light, onto the measurement axis. give. The retracted position of the marking mechanism P is determined by two limit switches in the X and Y directions (not shown). Therefore, if the amount of movement to the measurement axis is set in the set value register 12 as the number of pulses to drive the pulse motors 16 and 17, the initial control circuit 13 receives the output of the program counter 20 and reads the number of pulses. , a specific pulse is output to the motor drivers 14 and 15 to move the cursor 1 onto the measurement axis. To further simplify the circuit, it may be possible to move directly to the mark position without first moving to the measurement axis.

When the above operations are completed, the program counter 20 is advanced by one step, and the arithmetic circuits 9, 1
The selectors 21 and 22 are controlled so as to supply an output of 0 to the pulse generators 23 and 24.
The arithmetic circuit 9 calculates the axis deviation amount hy in the Y direction from the prism value in the Y direction and the diopter of the lens to be measured.
is calculated, and hy is found from equation (1). The arithmetic circuit 10 similarly calculates the amount of axis deviation hx in the X direction, and the arithmetic circuits 9 and 10 are both composed of a multiplication circuit and a division circuit.

The outputs of the arithmetic circuits 9 and 10 are sent to the selectors 21 and 2.
2 and then output to pulse generators 23 and 24.
The pulse generators 23 and 24 generate the calculated amount of axis deviation.
The number of pulses corresponding to hx and hy is output to the motor drivers 14 and 15, thereby moving the cursor 1 to the optical center of the lens to be measured, and the signal from the program counter 20 outputs the number of pulses to the motor drivers 14 and 15. 18, the solenoid 19 is activated to mark the optical center of the lens 4 to be tested. When the above operations are completed, the program counter 20 proceeds to the next slap and controls the selectors 21 and 22 so as to supply the output of the arithmetic circuit 11 to the pulse generators 23 and 24. The arithmetic circuit 11 decomposes the astigmatic axis angle output from the automatic lens meter 8 into vectors in the X-Y directions.

Generally, marks are placed on the lens 4 to be tested as shown in FIG. Point A ₀ represents the optical center of the lens to be tested, and point A ₁ and point A ₂ represent the cylinder axis direction.
The distance r (A ₀ − A ₁ ) is free, but it is usually 10 to 20 mm.
That's about it. Therefore, the calculation circuit 11 calculates the well-known conversion equation (4) from polar coordinates to rectangular coordinates. Here r is 10
Since it is fixed at ~20mm, Ax corresponding to the value of θ,
It is sufficient to create a TABLE in which the value of Ay is written to read-only memory (ROM) or the like. As described above, the arithmetic circuit 11 calculates the positions Ax and Ay of the point _A1 and outputs them to the pulse generators 23 and 24.
And point A ₂ is after marking point A ₁ , then cursor 1
is moved in opposite directions in both the X and Y directions by a value twice the amount of movement from A ₀ to A ₁ and marked. All of the above sequence controls are managed by the program counter 20.

A second embodiment of the marking device of the lens meter is shown in FIG. 8, and has the feature of calculating and marking more accurate hxhy. In Figure 8,
Blocks that operate in the same way as the blocks shown in FIG. 6 are given the same numbers (the information path related to the amount of markings is shown by a solid line, and the control system of each block element is shown by a broken line). Reference numeral 25 is an input keyboard for inputting the prism value of the prism-processed lens to be tested, and displays the horizontal and vertical prism values (P _X , P _Y ) or the combined prism amount and its base direction in angle using an orthogonal coordinate system. Polar coordinates (P,
θ) can be input.

The _PX signal input to the input keyboard 25 is
The value is input to a subtracter 28 which calculates ( _Px - Px) between it and the prism measurement value Px from the detection processing section 8 of the automatic lens meter, where it is subtracted. Also P _Y
Similarly, the signal is (P _Y - Py) between the prism measurement value Py from the detection processing section 8 of the automatic lens meter.
It is input to the subtracter 27 which calculates , and is subjected to subtraction processing. Furthermore, when inputted to the input keyboard 25 in the form of (p, θ), it is inputted to the coordinate converter 26 which converts polar coordinate display to rectangular coordinate display using equation (4).
(p, θ) is converted to (P _X , P _Y ) and the subtracter 2
7 and 28, and the same subtraction process as when (P _X , P _Y ) is input to the input keyboard 25 is performed. The selectors 29 and 30 select the subtracted values from the subtracters 27 and 28 when a prism value is input to the input keyboard 25, and select the subtraction values from the detection processing section 8 of the automatic lens meter when no prism value is input to the input keyboard 25.
Select Px signal. Selector 29, 30
are controlled by control signals S ₁ and S ₂ (broken lines) that tell whether input is being made to the input keyboard 25 or not. The calculation circuits 9' and 10' are circuits for calculating hx and hy as in Fig. 6, but in Fig. 8, the inputs thereof are S, C, θ, and from the detection processing section 8 of the automatic lens meter. Px,
Py or (P _X ,
Px) and (P _Y -Py) values, which are calculated according to equation (5), and the outputs are input to the selectors 21 and 22. The subsequent operation is the same as that shown in FIG.

As shown in detail in FIG. 9, the marked portion A shown in FIGS. 6 and 8 has the X-axis direction rails 62, 62' inserted into the support plates 61, 61',
2 and 62', the X-axis stage 63 is slidably held therethrough. Also, the X-axis stage 6
3 is penetrated and engaged with a gear 70, and the gear 70 is connected to the X-axis drive pulse motor 17 attached to the support plate 61. A Y-axis direction rail 6 is provided between the X-axis stage 63 and the rail holding plate 64.
5, 65' (hidden behind gear 71 and not visible) are inserted. A Y-axis stage 66 is slidably held through the rails 65, 65', and a gear 71 is also penetratingly engaged with the Y-axis stage 66, and the gear 71 is attached to the X-axis stage 63. The Y-axis drive pulse motor 16 is connected to the Y-axis drive pulse motor 16. A marking needle portion 67 is attached to the Y-axis stage 66. This marking needle portion 67 has a built-in solenoid 19 for pressing down the needle tip 6 during marking. The needle tip 6 has a structure similar to a pen tip used in an XY recorder. To explain the operation of the above-mentioned marking part A, FIGS. 6 and 8
Signals from the pulse generators 23 and 24 shown in the figure are sent to the X-axis drive pulse motor 17 and the Y-axis drive pulse motor 16, and the pulse motors 16 and 17 rotate by the number of pulses. The rotation of the pulse motor 17 rotates the gear 70, and the rotation of the gear 70 causes the X-axis stage 63 to move in the X-axis direction along the rails 62, 62'. Similarly, the rotation of the pulse motor 16 rotates the gear 71, and the rotation of the gear 71 causes the Y-axis stage 66 to move in the Y-axis direction along the wheels 65, 65'. When the marking command signal is input, a command is input from the program counter 20 to the solenoid driver 18, which activates the solenoid 19 to push down the needle tip 6 and mark the lens 4 to be tested.

Incidentally, in the embodiment shown in FIG. 9, an example has been described in which a general rotary pulse motor is used as the driving pulse motor in the X-axis direction and the Y-axis direction. However, instead of using this rotary pulse motor, electric energy is directly converted into linear mechanical energy to generate thrust by stretching the primary and secondary sides of the rotary motor and the gap between them in a straight line. , a so-called linear pulse motor can be used. In this case, the gears 70 and 71 shown in FIG. 9 are not required, and the rails 62, 65 and the drive motor can be integrated into an integral structure, and the marked portion A can be constructed more easily. That is, in FIG. 10, a rail 62' and a rail 202 having a linear pulse motor primary side electromagnetic part 203 on the upper surface are attached to the support plates 61, 61', and the rails 62', 202 are attached to the X direction. A stage 201 is slidably held therethrough. X direction stage 20
1 is the secondary electromagnetic part 204 of the linear pulse motor
Built-in. Furthermore, the X-direction stage 201 has an arm portion 201a, and this arm portion 201a has a primary side electromagnetic portion of a linear pulse motor for driving in the Y-direction, and protrusions 208a and 208b are provided at both ends of the arm portion 201a. It is provided. The arm portion 201a further includes a Y-direction stage 206.
is slidably held through the Y-direction stage 206, and a secondary electromagnetic part of a linear pulse motor for driving in the Y-direction is housed inside the Y-direction stage 206. Further, a marking needle portion 67 is provided below the Y-direction stage 206. This marking needle portion 67 has the same structure as the embodiment shown in FIG.

In another embodiment of the marked portion A, as shown in FIG.
A pulley 74 is attached to the shaft of the pulse motor 17, and a pulley 74' is attached to the shaft of the pulse motor 16. Also, the support plate 72
An X-axis rail 75 is inserted between and the support plate 73, and the rail 75 slidably extends through and holds the X-axis stage 76. X-axis stage 7
6 and the second X-axis stage 77, Y-axis rails 78, 78' are inserted, and the rails 78, 78' slidably pass through and hold the Y-axis stage 79. ing. A marking needle 67 similar to the marking needle portion 67 shown in FIG. 9 is attached to this Y-axis stage 79. The second X-axis stage 77 is slidably held through a rail 75' inserted into the support plates 72 and 73 parallel to the rail 75, and is movable integrally with the stage 76 in the X-axis direction. ing. Rails 80, 80' are attached to the support plates 72, 73.
is inserted parallel to the rail 75, and the rail 8
A tension control stage 81 is slidably held at 0 and 80'. The tension control stage 81 is connected to the other end of a spring 82 whose one end is coupled to the support plate 72, and the tension control 81 is always biased in one direction in the X-axis direction. There is. X
One end of an X-axis stage drive wire 83 is fixed to one side 76 a of the axis stage 76 , and the wire 83 is wound around idle pulleys 84 and 85 attached to the support body 72 . Wrapped around the supporting plates 72, 73
Idle pulleys 86, 87, 8 attached to
8 and is fixed to the side surface 76b of the X-axis stage with the necessary tension. On the other hand, the Y-axis stage drive wire 89 has one end fixed to the side surface 79a of the Y-axis stage 79, and the idle pulley 9 attached to the second X-axis stage 77.
It is wound around an idle pulley 91 attached to the stage 76 for the 0 and Of the two idler pulleys 95a, 95b, which are wound around the lower idler pulley 94a of the two idler pulleys 94a, 94b, which are rotatably mounted coaxially and independently on the support plate 72. It is wound around the outer idler pulley 95a, and the support plate 72
The idle pulley 96 attached to the above pulley 74', the idle pulley 97 attached to the support plate 72, the above idle pulleys 95b, 9
4b, the idle pulleys 98 and 99 attached to the support plate 72, and the idle pulley 100 attached to the X-axis stage 76, respectively.
It is fixed to the side surface 79b of the shaft stage 79 with the necessary tension. In addition, the X-axis stage 76
One end of a tension control wire 101 is fixed to the side surface 76b, and this wire 101 is wound around an idle pulley 102 attached to the support plate 73 and an idle pulley 103 attached to the tension control stage 81. , the other end is fixed to a protruding pin 104 attached to the support plate 73. To explain the operation of the embodiment shown in FIG.
Drive pulses are sent to the motor drivers 14, 15, the X-axis drive motor 17, and the Y-axis drive motor 16 by signals from the pulse generator 23 or 24 shown in the figure. When the X-axis drive motor 17 rotates, the rotation is transmitted to the X-axis drive wire 83, and the wire moves along the winding route of the X-axis drive wire 83 described above, and the X-axis stage 7
6 along the rail 75. Further, the rotation of the Y-axis drive motor 16 is controlled by the Y-axis drive wire 8.
9, move the Y-axis stage 79 to the rail 78,
Move along 78'. Here, the tension control stage 81 is for preventing the Y-axis stage from moving due to the movement of the X-axis stage. In this way, the marking needle 67 is moved to the required position by the pulse motors 16, 17, and marking is performed on the lens 4 to be tested in the same manner as shown in FIG.

Next, FIG. 12 shows an embodiment for selecting a predetermined marking position by driving the lens holder in the X-Y direction instead of driving the marking needle in the X-Y direction.
X-axis direction guide rails 112a, 112b are inserted into the support plates 110a, 110b, and the rails 112a, 112b are connected to the X-axis direction stage 111.
is slidably held therethrough. A gear 113 is penetratingly engaged with the X-axis direction stage 111.
The gear 113 is connected to an X-axis drive pulse motor 17 attached to the support plate 110a. The X-axis direction stage 111 is connected to the Y-axis direction guide rail 11.
4a and 114b are inserted. The Y-axis stage 116 is slidably held by guide rails 114a and 114b. Also gear 1
15 are in penetrating engagement with each other, and this gear 115 is connected to a Y-axis direction drive motor 16 attached to the X-axis direction stage 111. The Y-axis direction stage 116 is provided with a test lens holder 117,
The lens to be tested 4 is placed on top of this. The placed test lens 4 is placed on the protruding wall 11 of the stage in the X-axis direction.
It is pressed and held by a lens holding ring 120 of a lens holding tool 119 made of an elastic member attached to a lens holder 8 . The lens meter body has axis 122.
There is a marking arm section 123 that is rotatably attached to this shaft 122. Marking arm 123
When not marking a point, it is retracted off the optical axis so as not to interfere with the measurement of the rotated test lens. When marking a point, the marking arm portion 123 is rotated until the cut surface 127 of the arm shaft 126 comes into contact with the protruding surface 125 of the shaft 122. The marking needle is brought to the reference position in this abutting state.
The mark arm section 123 has an arm shaft 126 rotatably attached to the shaft 122, and has a shaft rotation pulse motor 128 within the shaft. Further, an arm 124 is attached to the arm shaft 126. The arm 124 includes a shaft rotation pulse motor 1.
Pulley 129 connected to 28 and pulley 1
A pulley 131 around which a belt 130 is wound is attached to the pulley 29 . A marking needle portion 132 is integrally attached to the pulley 131. The marking needle part 132 includes three marking needles 133a, 133b,
133c, and is adapted to rotate as the pulley 131 rotates. 1 of this marking needle
A cross section of the tube 133b taken along line XII-XII is shown in FIG. A solenoid 19 is built in the marking needle part 132. Below the solenoid 19, the slide arm 135 is attached to the shaft portion 13 of the pulley 131.
The slide arm 135 is supported by a spring 136. The slide arm 135 has a protrusion 135a, which is inserted into the slot 131 of the pulley shaft 139.
A marking ink pot 137 is formed below the slide arm 135, which is adapted to slide a, and marking ink is poured into this pot. This marking ink is marked on the lens 4 to be tested by the needle tip 138.

Here, the operation of the marking device described above will be explained. 6 and 8, the pulse signals from the pulse generators 23 and 24 operate the X-axis direction drive pulse motor 17 and the Y-axis direction drive pulse motor 16, and their rotation rotates the gears 113 and 115. . Based on the calculation results of the calculation circuits 9 and 10 (9' and 10' in FIG. 8), the gear 11 is
3,115 rotations to move the X-axis stage 111 and Y-axis stage 116 in the X and Y directions.
move in the direction. This X-axis direction stage 11
1. By moving the stage 116 in the Y-axis direction, the optical center of the test lens 4 or the geometric center position in the case of a prism lens can be set. Regarding the direction of the cylinder axis, the cylinder axis angle θ from the detection processing section 8 of the lens meter is input to the pulse motor 128 to rotate the marking needle part 132 by the angle θ. The protrusion 125 of the shaft 122 and the cutout surface 127 of the rotating shaft
Rotate the arm 124 until they come into contact with each other. When a marking command is input to the solenoid 19, a repulsive force is generated on the slide arm 135 by the magnet 134, which has the same magnetic pole as that of the solenoid 19, and the slide arm 135 is pushed down so that the tip 138 touches the test lens 4. mark. In the embodiment shown in FIG. 12, since the test lens itself is movable in the X-Y direction, when driving the test lens, the prism value of the test lens in a sequentially moving state is measured,
By applying feedback to the drive circuit,
A servo loop can be configured, which allows for more accurate positioning.

In each of the above embodiments, the marking mechanism section is
Although we have explained the orthogonal coordinate movement type that drives in the X and Y directions, Fig. 14 shows a rotary drive motor whose rotation center is located away from the tested lens, and a marking point that moves in a straight line on the rotation axis. This figure shows a polar coordinate marking mechanism in which an arm with a needle is attached and the position of the marking point on the test lens is determined from the rotation angle γ of the motor and the moving distance l of the marking needle on the arm. . In FIG. 13, blocks that operate in the same way as the blocks shown in FIG. 6 are numbered the same. The difference between FIG. 6 and FIG. 14 is that in the block diagram of the drive circuit, between the selectors 21, 22 and the pulse generators 23, 24,
The (hx, hy) information from the arithmetic circuit selected by the selector is sent to the arm rotation pulse motor 30.
A γ-l converter 30 that converts the rotation angle γ of 3 and the movement amount l of the cursor 307 on the rotating arm 305.
1,302 are connected, an arm rotation pulse motor 303 is driven by the motor driver 15 instead of the X-Axis motor 17, and a pulse linear motor 304 for driving the cursor is connected instead of the Y-Axis motor 16. is driven by a motor driver 14.
In this embodiment, a pulse linear motor as explained in FIG. 10 is used to drive the cursor, but other mechanisms are also possible. 1st
The operation of FIG. 4 is basically the same as the embodiment shown in FIG. The signal from the detection processing unit 8 is processed by calculation circuits 9, 10, and 11, and then sent to the selector 2.
1 and 22 and are selected. The drive signals in the X-Y coordinate system from the selectors 21 and 22 are converted into γ and l signals by the γ-l converters 301 and 302, and are sent to the motor drivers 14 and 15, respectively.
The arm rotation pulse motor 303 and the cursor drive pulse linear motor 304 are driven by this, and the cursor is moved to the mark point position. after that,
The solenoid 19 is driven by a signal from the program counter 20 to mark a point.

Another embodiment of the arm rotating type marking mechanism section, as shown in FIG. 15, marks the lens to be tested using two rotating arms and a marking section attached to the intersection of these arms. It is a mechanism. In FIG. 15, a first arm 406 is fitted onto a rotating shaft 410 of a first arm rotating pulse motor 404, and a slot 408 is formed in the first arm. In addition, the second arm rotation pulse motor 4
A second arm 407 is fitted to the rotating shaft 411 of the 05, and a slot 409 is fitted to the second arm.
is formed. and slots 408, 40
At the intersection of 9, there is a shaft member 412 that is slidably inserted into these slots, and this shaft member 412
A marking needle part 67 is attached below. 1st
In FIG. 5, blocks that operate in the same way as the blocks shown in FIG. 6 are given the same numbers.
In the operation of this embodiment, as shown in FIG.
After being input to 0 and 21 and selected, it is input to a first rotation angle converter 402 and a second rotation angle converter 403. Here, the calculated value from the calculation circuit is converted into a rotation amount. After that, it is converted into a pulse signal by pulse generators 23 and 24, and the motor driver 1
4 and 15. Based on the signal from the motor driver, the first arm rotation pulse motor 404 and the second arm rotation pulse motor 40 are activated.
5 to drive the first arm 406 and the second arm 40.
7 by the required angle. Rotation of both arms causes the shaft members 412 in the slots of both arms to slide, thereby locating the marking points. Thereafter, the solenoid 19 in the marking needle section 67 is driven by the marking signal to mark the lens to be tested.

[Brief explanation of the drawing]

Fig. 1 is an optical diagram showing the principle of the configuration of the present invention, Fig. 2 is a diagram showing the coordinates of the P plane in Fig. 1, Fig. 3 is an optical diagram explaining the prism refractive power, and Fig. 4 is an optical diagram showing the optical center and A front view of the lens to be tested showing the relationship between the geometric center and the measurement point, FIG. 5 is an explanatory diagram of calculations used in the present invention, FIG. 6 is a perspective view and circuit diagram of the first embodiment,
FIG. 7 is a diagram showing marking points, FIG. 8 is a perspective view and circuit diagram of the second embodiment, FIG. 9 is a perspective view of the printed section, FIG. 10 is a perspective view of another printed section, and FIG. FIG. 12 is a perspective view of still another printing section, FIG. 13 is a sectional view of the printing needle section taken along line XII-XII in FIG. 11, and FIG. 14 is a perspective view of another printing section. FIG. 15 is a perspective view of still another printing section. FIG. 15 is a perspective view of still another printing section. 1...Cursor, 2...Y-direction arm, 3...X-
Direction arm, 4...Test lens, 5...Lens support stand, 8...Detection processing section, 9...Arithmetic circuit, 20...Program counter, 21...Selector, 23...Pulse generator.

Claims (1)

[Claims] 1. In a marking device that marks the optical center or geometric center of a lens to be detected of a lens meter that automatically measures the refractive properties and prism properties of the lens to be detected, A marking means comprising a movable test lens holder and a marking section having at least one marking needle; and detecting information on the refractive properties and prism properties of the test lens from the measurement section of the lens meter. a detection means for calculating the optical center position of the test lens from the information of the detection means or a geometric center position from the amount of prism inputted in advance; and a marking means for calculating the information from the calculation means. a drive signal means for converting into a drive signal; and a drive means for driving the marking means so that the marking needle marks the optical center position or the geometrical center position based on information from the drive signal means. A marking device for a lens meter, characterized in that: 2. In claim 1, the marking section of the marking means moves linearly in a first moving mechanism that moves linearly in one direction and in a direction perpendicular to the first moving mechanism. a second moving mechanism; and at least one movable in a direction perpendicular to the moving direction of the second moving mechanism.
A marking device for a lens meter, comprising a marking needle portion having a book marking needle. 3. In claim 1, the lens holder of the marking means includes a first movable stage portion that moves linearly in one direction, and a first movable stage portion that moves linearly in a direction perpendicular to the first movable stage portion. 1. A marking device for a lens meter, comprising: a second movable stage section that moves in a direction, and the second movable stage section has a holder for holding a lens to be tested. 4. In claim 1 or 3, the arm section on which the marking section is rotatably held has at least one marking needle movable in a direction perpendicular to the extending direction of the arm section. A marking device for a lens meter, characterized in that it has a marking device. 5. According to any one of claims 2 to 4, there is provided a solenoid in which the marking needle part operates in response to a marking command, a marking stage that moves repulsively due to the magnetic force generated by the solenoid, and a marking stage on which the marking needle part operates in response to a marking command; A lens meter marking device characterized by being composed of a built-in ink pot and a needle tip. 6. In any one of claims 1 to 5, the calculation means sets the refractive power of the lens to be tested as D, the amount of prism in the X direction as Px, the amount of prism in the Y direction as Py, and calculates the mark point. The amount of movement of the marking point needle in the X direction from the refractive characteristic measurement point of the test lens is hx,
A marking device for a lens meter, which calculates hx=Px/D hy=Py/D when the amount of movement in the Y direction is hy. 7. In any one of claims 1 to 5, the calculation means calculates a mark such that Ax=r cosθ Ay=r sinθ from the cylindrical axis angle θ of the test lens and an arbitrary mark point radius r. A marking device for a lens meter, characterized in that it has a calculation means for calculating a point position (Ax, Ay). 8. In any one of claims 1 to 5, the calculation means calculates the spherical refractive power of the test lens as S, the cylindrical refractive power as C, the axis angle as θ, and the X direction at an arbitrary measurement point. Prism amount Px, Y
When the direction prism amount is Py, the amount of movement in the X-axis direction from this arbitrary measurement point to the point to be marked is hx,
When the amount of movement in the Y-axis direction is hy, hx=
Px・S+Px・C・cos ² θ−Py・C・sinθ・cosθ/S・
(S+C) hx=
Py・S+Py・C・sin ² θ−Px・C・sinθ・cosθ/S・
A marking device for a lens meter, characterized in that it calculates (S+C). 9. In any one of claims 1 to 5, the calculation means includes means for inputting the amount of prism of the lens to be inspected to be prism-processed, and calculating the amount of prism processing from the input information to the input means. and subtraction means for subtracting a prism measurement amount at an arbitrary measurement point of a lens to be tested. 10 In claim 9, when the calculation means or the input means inputs the prism amount of the prism-processed lens to be tested as the prism refractive power P and its base direction θ, the X-direction prism amount Px , a marking device for a lensmeter, comprising a conversion means for converting the prism amount Py in the Y-axis direction as Px=P cosθ Py=P sinθ. 11. In claims 1 to 10, the driving means has an initial drive means for retracting the marking means outside the refraction specific measurement optical axis of the lens meter other than when marking. A marking device for a lens meter, characterized by having a control circuit. 12. The marking device for a lens meter according to any one of claims 1 to 10, wherein the driving means includes a pulse motor driven by a pulse signal from a pulse generator. 13. In any one of claims 1 to 12, the marking means comprises at least one marking needle that moves on an arm and at least one rotational drive means that rotates the arm. A marking device for a lens meter, characterized in that: