JP6433258B2 - How to make a binocular loupe - Google Patents

Description

  The present invention relates to a binocular loupe used in medical surgery and precision work, and more particularly, to a method for manufacturing a binocular loupe for attaching a loupe to a carrier lens of a frame.

  The binocular loupe has been widely used in the medical field, precision work, jewelry processing, and other fields as a means of magnifying and visually recognizing a local visual object at hand. It is required to be visible with

  As shown in FIG. 1, a general lens-fitting binocular loupe 10 includes a frame 1 having the same structure as glasses for adjusting a user's visual acuity and a binocular loupe main body for enlarging an image of a work target. A certain loupe 2, a carrier lens 5 that is fitted into the frame 1 and attaches the loupe 2, an attachment portion 3 that attaches the loupe 2 to the carrier lens 5, and a frame vine portion that is attached to the face of a precision worker 6 and. The loupe 2 is inserted into an opening cut out on the surface of the carrier lens 5 and is fixed by the mounting portion 3.

  FIG. 2 is an explanatory view showing a state in which the operator wears the binocular loupe 10. The binocular loupe 10 can be worn on the face by putting the frame vine portion 6 of the frame 1 on the ears of the operator, like normal glasses.

  As shown in FIG. 3, the posture when the worker is working is determined by staring at the tip (work operation point P) of the instrument that is being held in a forward tilted posture and passing through the loupe 2. Magnify and observe. Accordingly, the loupe 2 is inclined downward (downward mounting angle r) as shown in FIG. 2 in the vertical direction with respect to the plane of the carrier lens 5, and in the horizontal direction in FIG. As shown, it is attached with an inclination angle toward the inside (the nose pad side) (inner mounting angles p and q of the left and right eyes).

  However, since such a binocular loupe 10 is related to human life when used in the medical field, in order to ensure high-precision visibility, an accurate pupil position, lower mounting angle r depending on the user. In addition, it is necessary to measure the inner mounting angles p and q and attach the loupe 2 to the carrier lens 5 based on the measurement result.

  Therefore, the operator (doctor) who tried on the frame 1 reproduces the actual work posture (surgical posture), and measured the distance from the work operation point P to the frame, the distance to the pupils of the left and right eyes, etc. with a measure. Alternatively, the binocular loupe is manufactured by attaching the loupe 2 to the carrier lens 5 based on the pupil position, the lower mounting angle r, and the inner mounting angles p and q, which are obtained by calculation from the captured image and derived from the measurement result. Is known (see, for example, Patent Document 1).

Japanese Patent No. 531601

  As shown in FIG. 5, the lower mounting angle r is determined by measuring the horizontal distance N perpendicular to the vertical line passing through the distance M from the work operation point P to the carrier lens 5 and the sides of the distances M and N. And the forward tilt angle α of the carrier lens 5 when the operator performs an operation.

  At this time, it is difficult to obtain the forward tilt angle α by actual measurement, and in Patent Document 1, the head or carrier lens 5 with respect to a vertical line passing through the spine from the image from the side of the wearer who is in the forward tilt posture. It is obtained by measuring the forward tilt angle.

  However, due to the structure of the frame 1, the carrier lens 5 is not attached at right angles to the frame vine portion 6. Even when the wearer puts the frame 1 on his / her ear and faces his face horizontally, the frame vine portion 6 is not strictly horizontal. Therefore, an error occurs if the inclination angle with respect to the vertical line is simply measured to measure the forward inclination angle α.

  The present invention has been made in view of the above points, and it is possible to accurately measure the forward tilt angle α when an operator performs work and attach the loupe to the carrier lens at an accurate downward mounting angle. The object is to provide a method for producing a binocular loupe.

Therefore, a binocular loupe manufacturing method according to the present invention is a binocular loupe manufacturing method in which a loupe is attached to a carrier lens mounted on a frame under conditions according to the wearer of the binocular loupe. Attaching a square marker having all four interior angles of 90 ° to the frame; (b) when the wearer of the frame stares at a lower work operation position in a working posture when using a binocular loupe; Imaging the wearer's face from the work operation location; (c) detecting the marker from the captured oblique image of the face from below; (d) a trapezoid from the square of the marker detected in the image processing step The forward tilt angle α of the carrier lens is calculated from the degree of change in shape of the carrier lens, and the loupe is attached to the carrier lens based on the forward tilt angle α. Determining a lower mounting angle r during that, staring at the working operation location wearer beneath the frame by identifying a portion that changes discontinuously brightness from (e) the image Identifying a right eye pupil position QR (XR, YR) and a left eye pupil position QL (XL, YL) on the XY axis on the carrier lens surface when being, (f) a wearer of the frame The right eye pupil position QR and the left are based on the angles when the respective corneas are rotated downward as the left and right pupils move when the eye gaze shifts from a posture looking at the horizontal direction to the working posture. Correcting each Y-coordinate value of the eye pupil position QL to determine an attachment right loupe attachment coordinate position Q′R and a left loupe attachment coordinate position Q′L of the left and right loupes on the carrier lens surface; ) Right eye pupil position Q Mounted on the surfaces of the left and right carrier lenses based on the distance in the X coordinate direction from each of R and the left eye pupil position QL to the center point C of the marker and the distance L from the center point C to the work operation point P. Determining each inner mounting angle p, q of the loupe, (h) the right loupe mounting coordinate position Q′R and the left loupe mounting coordinate position Q′L, the lower mounting angle r, and the inner mounting Each of the steps includes forming openings in the left and right carrier lens surfaces based on the angles p and q, and inserting and fixing the left and right loupes in the openings .

At this time, in the step (c), an image feature specific to the face is extracted from the image to perform face detection, and the marker is detected from the detected face image .

  In the step (d), the forward tilt angle α is determined by specifying the coordinate positions of the four corners of the marker. Specifically, the image is polylined, and the coordinate position is specified by searching for an angle close to 90 degrees from four angles.

  Then, if the coordinate position is specified, the top and bottom dimensions of the trapezoid derived from the coordinate position, the vertical / horizontal dimension ratio of the actual marker, and the distance from the work operation location to the center point of the marker Based on this, the forward tilt angle α can be determined.

  In the step (d), if the forward tilt angle α is determined, it passes through the line from the operation position measured in advance to the carrier lens to the carrier lens and the carrier lens measured in advance at the distance N. The lower mounting angle can be determined based on the remainder angle of the angle sandwiched between the horizontal lines orthogonal to the vertical line and the forward tilt angle α.

  Further, (e) the right eye pupil position (XR, YR) and the left eye pupil position (XL, YL) on the XY axis where the wearer of the frame stares at the work operation position below from the image. And a step of specifying.

  In the step (e), the position of the pupil is detected by specifying a location where the brightness changes discontinuously from the image. For this purpose, it is preferable to detect a face by extracting an image feature specific to the face from the image and detect the pupil position from the detected face portion.

  In this case, image features specific to the eyes are extracted from the detected face. Then, the pupil position is detected by binarizing the detected eye image to detect the outline of the iris, and further performing morphological processing to detect a rectangle with the maximum luminance.

  In this case, the Y coordinate value for attaching the loupe to the carrier lens is determined based on the angle by which the wearer of the frame rotates the cornea upward in order to turn the line of sight in the horizontal direction. At this time, the angle at which the cornea rotates upward is the forward tilt angle α, the tilt angle θ of the carrier lens with respect to the vertical line, the distance V between the cornea and the carrier lens, and the work operation. It may be based on the distance M from the location to the surface of the carrier lens.

  According to the binocular loupe manufacturing method according to the present invention, a square marker is captured in a trapezoidal shape by imaging from a lower work target location, and the inclination of the marker according to the degree of change from the regular square to the trapezoid, That is, in order to detect the tilt of the carrier lens, the wearer's forward tilt angle can be accurately grasped. Therefore, the loupe can be attached to the carrier lens at an appropriate downward mounting angle corresponding to the forward tilting posture during the wearer's work.

The whole block diagram of a binocular loupe is shown. A state in which a binocular loupe is worn is shown in a side view. Explanatory drawing which shows typically a state when an operator wears a binocular loupe and takes a working posture is shown. Explanatory drawing of the inner side mounting angle at the time of attaching a loupe to a carrier lens is shown. Explanatory drawing of the downward mounting angle at the time of attaching a loupe to a carrier lens is shown. The block diagram which shows the structure of a camera roughly is shown. 1 shows a schematic configuration of a computer in a block diagram. A user interface screen by a computer when processing a photographed image is schematically shown. The explanatory view of the processing procedure by a cascade type classification program is shown. The front image from the work object location of the marker attached to the frame is typically shown. Explanatory drawing from the plane of the image of FIG. 10 is shown. Explanatory drawing from the side of the image of FIG. 10 is shown. The schematic diagram explaining the positional relationship of a pupil, a carrier lens, and a work operation location from the side is shown. An explanatory view of detection of an inner wearing angle from a pupil position of both right and left eyes is shown. The front view for demonstrating the coordinate position of the pupil on the surface of a carrier lens is shown. The schematic diagram explaining the state which the centerline v1 of a face and the centerline v2 of a flame | frame have shifted | deviated by inclination is shown. The schematic diagram explaining the state which the centerline v1 of a face and the centerline v2 of a flame | frame have shifted | deviated in parallel with the space | interval is shown.

  Embodiments of a binocular loupe manufacturing method according to the present invention will be described below in detail with reference to the drawings.

  In this manufacturing method, the orderer of the binocular loupe wears the frame 1 to which the loupe 2 is not attached and reproduces the work posture, and the face at that time is photographed by the camera 11 installed at the work operation point P. The computer processes the photographing data to measure the pupil position, the lower mounting angle r, and the inner mounting angles p and q according to the wearer of the frame 1. A binocular loupe is manufactured by attaching the loupe 2.

  FIG. 6 schematically shows the configuration of the camera 11. The camera 11 includes a control unit 12, a strobe light irradiation device 13, an optical system 14, an image sensor 15, an image memory 16, a computer 20 that performs image processing, and an interface 17 that transmits and receives data and signals. It is.

  The control unit 12 includes a program storage unit that controls each unit of the camera 11 and a CPU that executes the program. As control of the control unit 12, control such as imaging magnification and focusing of the optical system 14 according to an instruction from the computer 20, and control such as saving and reading of an image with respect to the image memory 16 are performed.

  FIG. 7 schematically shows the configuration of the computer 20. The computer 20 includes a monitor unit 21, an input device 22, a central control unit 23 that performs predetermined arithmetic processing and control processing based on a program, and an interface 24 that exchanges data and signals with the camera 11.

  The central control unit 23 includes an imaging program 23a, a user interface program 23b, an image processing program 23c, an analysis program 23d, and a central processing unit CPU that executes these programs. The image processing program 23c is a cascade classifier that performs processing for subdividing and classifying the identification target in order from the top. In this example, the image processing program 23c identifies a face and eyes from a human image. Therefore, the image processing program 23c includes a face detection cascade file 23e and an eye detection cascade file 23f in which features of faces and eyes are stored in advance by learning.

  When photographing a wearer wearing the frame 1 with the camera 11, a regular square marker 8 is attached to the bridge 7 between both eyes of the frame 1 with screws. In this case, the marker 8 is attached to the center position in the horizontal direction of the frame 1 so that the center thereof is located. The marker 8 is made of a white acrylic plate, and is engraved and painted in black except for the peripheral portion and the central portion to be screwed.

  Shooting is performed by the computer 20 operating the camera 11. The central control unit 23 executes the imaging program 23 a to control the camera 11, and the center point C of the marker 8 attached to the frame 1 (shown in FIG. 8). Set the focal length to. In response to an instruction from the computer 20, the camera 11 outputs an image signal obtained by converting an image captured by the optical system 14 into an electrical signal by the image sensor 15. Then, the computer 20 displays this image on the monitor unit 21, so that the binocular loupe producer can instruct the input device 22 to adjust the range and alignment of the image captured by the camera 11. Adjusts the image taken by the camera 11 in accordance with the contents of the adjustment instruction.

  In response to an imaging command sent from the computer 20 under the manufacturer's instruction, the camera 11 irradiates the strobe light from the strobe light irradiation device 13 to take a picture. The image sensor 15 of the camera 11 converts the photographic light from the optical system 14 into an electrical signal and outputs it, and the control unit 12 stores the image data in the image memory 16.

  In the computer 20, when an image processing operation is designated, the central control unit 23 processes the user interface program 23 b and displays the user interface screen shown in FIG. 8 on the monitor unit 21. When the “open image file” button in the input section of this screen is operated to specify an image data file of a specific wearer, the central control section 23 reads this image data from the image memory 16. Are displayed in the image display area IM of the screen.

  Subsequently, when the “Perform pupil detection” button or the “Perform marker detection” button on the user interface screen is checked and the “Start analysis” button is operated, the computer 20 analyzes the pupil position and the center position of the marker 8. To do.

  FIG. 9A shows the processing procedure of pupil position detection by the image processing program 23c, and the central control unit 23 processes the image processing program 23c so that the brightness is sharp from the image, in other words. The pupil position is detected by specifying a discontinuously changing portion. First, the central control unit 23 performs face detection by using the face detection cascade file 23e in the first stage to determine whether an identification target corresponds to a face from image characteristics unique to the face. In the next second stage, the eye is detected by subdividing the object to be identified and using the eye detection cascade file 23f to determine whether the object to be identified corresponds to the eye from image characteristics unique to the eye. In the third stage, the eye detection image is binarized to detect the contour of the iris. Further, in the fourth stage, by performing a morphological process to detect a rectangle with the maximum luminance, the computer 20 detects the coordinate position of the wearer's right pupil (XR, YR) and the coordinate position of the left pupil (XL, YL). Is detected and displayed on the screen. In this case, for example, the point at the upper left corner of the image display area IM is set as the coordinate reference point O.

FIG. 9B shows a marker detection processing procedure by the image processing program 23c , and the central control unit 23 uses the face detection cascade file 23e in the first stage to detect the marker 8. Narrow down the area where the. In the next second stage, the marker 8 is recognized by converting the detected face image into a polyline and extracting one having four angles, each having an angle close to 90 degrees. In the third stage, the computer 20 displays the coordinate position and scale of the center of the marker 8 on the screen. The scale indicates how many pixels in the image corresponds to 1 mm, and the central control unit 23 calculates based on the actual size of the marker 8 input in advance.

  When the pupil position and the center position of the marker 8 are detected in this way, the computer 20 processes the analysis program 23d, so that the hole position when attaching the loupe 2 on the surface of the carrier lens 5 from these detection data. And the lower mounting angle and the inner mounting angle are derived by calculation.

[Determination of the lower mounting angle of the loupe]
The lower mounting angle r can be obtained from the forward tilt angle α and the angle β of the carrier lens 5 as described with reference to FIG. 5. At this time, how to obtain the forward tilt angle α will be described.

  An image of the marker 8 viewed from the front when the wearer tilts his / her face downward and stares at the work operation place P is shown in FIG. 2 because the lower side is closer to the work operation place P than the upper side. As shown by a solid line in FIG. 10, the upper side has a trapezoidal shape shorter than the lower side. At this time, the coordinate positions of the four corners A, B, C, and D of the trapezoid 8 of the marker 8 recognized by the central control unit 23 are respectively (X1, Y1), (X2, Y2), (X3, Y3). And (X4, Y4). At the same time, since the vertical and horizontal dimensions of the regular square marker 8 are input in advance, the central control unit 23 has four corners A, B, C, D at the virtual positions indicated by the broken lines of the original regular square 8. (X1 ′, Y1 ′), (X2 ′, Y2 ′), (X3 ′, Y3 ′) and (X4 ′, Y4 ′) are obtained by calculation.

  Accordingly, the height dimension a of the marker 8 captured as a trapezoid can be represented by (Y1 + Y3), the upper side dimension b1 can be represented by (X1 + X2), and the bottom side dimension b2 can be represented by (X3 + X4). Further, when the marker 8 is a regular square, the vertical dimension a ′ can be expressed by (Y1 ′ + Y3 ′) and the horizontal dimension b ′ (X1 ′ + X2 ′).

The forward tilt angle α can be obtained from the following equation using these dimension values b1, b2, a ′, and b ′. Note that L is the distance from the work operation point P to the center point C of the marker 8, and is measured by measurement with a measure.
α = sin ⁻¹ {(1 / b1-1 / b2) × b ′ / a ′ × L}

Here, the above formula for calculating the forward tilt angle α will be described. FIG. 11 shows a plan view of the marker 8 viewed from the work operation place P. FIG.
(1) In FIG. 12, when the marker 8 is tilted and its vertical dimension a ′ is the hypotenuse and the horizontal side dimension is ΔL, the forward tilt angle α is expressed as follows.
α = sin ⁻¹ (ΔL / a ′)
(2) Since a ′ is known from the actual measurement of the marker 8, when ΔL is obtained, if ΔL is divided into ΔL1 and ΔL2 at the center C of the marker 8, the following relationship is established (FIG. 11).
tan θ1 = (b1 / 2) / L = (b ′ / 2) / (L + ΔL1)
∴ΔL1 = (b ′ / b1-1) × L
tan θ2 = (b2 / 2) / L = (b ′ / 2) / (L−ΔL2)
∴ΔL2 = (1−b ′ / b2) × L
(3) Therefore, ΔL is obtained as follows.
ΔL = ΔL1 + ΔL2 = {(b ′ / b1-1) + (1-b ′ / b2)} × L = {(1 / b1-1 / b2) × b ′ × L}
(4) By obtaining ΔL, the above equation for obtaining the forward tilt angle α is established as follows.
α = sin ⁻¹ (ΔL / a) = sin ⁻¹ {(1 / b1-1 / b2) × b ′ / a ′ × L}

Incidentally, the distance L can be measured by irradiating the center point C of the marker 8 with a laser from the operation point P using a laser measuring machine in addition to measurement by a measure. In addition to such actual measurement, it can be obtained by the following calculation from the focal length f of imaging, the actual size of the horizontal dimension b ′ of the marker 8 and the image size by the camera 11.
L = {f × (actual size of marker 8)} / (image size of marker 8)

  When the forward tilt angle α is obtained in this way, the angle β is set in the horizontal direction orthogonal to the distance M from the operation point P to the carrier lens 5 and the vertical line passing through the carrier lens 5 as described in FIG. Since the distance N can be obtained by measuring, the lower mounting angle r can be derived.

[Determination of the mounting angle of the loupe]
The respective inner mounting angles p and q when the left and right loupes 2 are mounted on the carrier lens 5 are X from the wearer's right and left pupil positions to the center point C of the marker 8, as shown in FIG. It is determined based on the distance in the direction and the distance L from the same center point C to the work operation place P.

The distance in the X direction from the center point C at the pupil position of the left and right eyes of the wearer is the same whether the face is tilted or the front is turned. The computer 20 determines the right eye from the coordinates of the pupil position. XR and the left eye measures XL. Further, the distance L can be obtained by various methods as described above. Therefore, the left and right inner mounting angles are as follows.
p = tan ⁻¹ (L / XR)
q = tan ⁻¹ (L / XL)

[Detect hole position]
The detection of the drilling position when the loupe 2 is attached to the carrier lens 5 will be described with reference to FIGS.

FIG. 13A shows a state in which the wearer of the frame 1 is gazing at the pupil's cornea 25 toward the work operation position P with the upper body tilted downward. As shown in FIG. 15 , the coordinates of the point Q on the surface of the carrier lens 5 that connects are QR (XR, YR) for the right pupil or QL (XL, YL) for the left pupil. α and M are the forward tilt angle α described in FIG. 5 and the distance from the work operation point P to the surface of the carrier lens 5. The frame 1 is designed so that the surface of the carrier lens 5 is inclined with respect to the vertical line when a person puts it on the face, and this inclination angle of the carrier lens 5 is indicated by δ. Further, the distance between the cornea 25 and the carrier lens 5 (corner apex distance) is indicated by V. For the distance M, it is preferable to separately measure the distance from the work operation point P to the left and right eye carrier lenses 5 if accuracy is expected. Then, like the distance L, the measurement is obtained by actual measurement using a measure or a laser measuring instrument or calculation from a captured image.

  Then, when the frame wearer releases the forward leaning posture and turns the line of sight e in the horizontal direction as shown in FIG. 13B, the pupil moves, and the cornea 25 is angled upward (α− Rotate by δ). Therefore, the pupil position on the surface of the carrier lens 5 moves according to the rotation amount by a distance d on the Y coordinate axis as shown in FIG. This distance d can be expressed by (V + M) tan (α−δ).

Accordingly, the coordinate positions of the left and right pupils when the line of sight e is directed in the horizontal direction are as follows. These coordinate positions are drilled in the surface of the carrier lens 5 and the right drilling position Q′R where the loupe 2 is attached. The left drilling position Q′L.
Q′R (XR, YR + (V + M) tan (α−δ))
Q′L (XL, YL + (V + M) tan (α−δ))

By the way, when photographing with a spectacle frame, the center line v1 of the wearer's face may not coincide with the center line v2 of the frame due to physical characteristics of the wearer, adjustment of the frame, and the like. In FIG. 16, the center line v2 is rotated rightward about the center point C , that is, the center line v2 is inclined by an angle γ with respect to the center line v1. In FIG. 17, the center lines v1 and v2 are perpendicular to each other, but they are in a parallel state with an interval t.

Therefore, when the discrepancy shown in FIG. 16 has occurred, when the central control unit 23 specifies the coordinate positions QR (XR, YR) and QL (XL, YL) of the left and right pupils, the following correction is performed. I do.
QR (XR, YR + XRtanγ)
QL (XL, YL + XLtanγ)
Here, the angle γ is calculated from the difference between the numerical values of Y1 and Y2 (or Y3 and Y4) at the coordinate positions of the four corners A and B (or C and D) of the marker 8. be able to.

When the discrepancy shown in FIG. 17 occurs, the central control unit 23 specifies the following corrections when the coordinate positions QR (XR, YR) and QL (XL, YL) of the left and right pupils are specified. I do.
QR (XR + t, YR)
QL (XL-t, YL)
Here, the interval t can be derived from the difference between the X coordinate value at the intermediate position between the left and right pupils and the X coordinate value of the center point C of the marker 8.

  As described above, even if there is a mismatch between the face center line v1 and the frame center line v2, the central control unit 23 can accurately obtain the coordinate positions QR and QL of the left and right pupils. In this case, even if the mismatches shown in FIGS. 16 and 17 occur in combination, the above correction can be used. That is, even when the Y coordinate values YR and YL of the pupil position are corrected based on the angle γ, if the center line v1 and the center line v2 are displaced in parallel with an interval t ′, the pupil The X coordinate values XR and XL of the position are corrected based on the interval t ′.

[Production of binocular loupe]
The binocular loupe is manufactured by programming the NC machine with the position of inserting the loupe 2 into the carrier lens 5 from the hole position coordinates thus determined, the lower mounting angle r and the inner mounting angles p and q, and cutting the insertion portion. Then, the surface of the carrier lens 5 is cut out to form an opening. After the opening is formed, the loupe 2 is inserted into the carrier lens 5 from the opening, and the lower mounting angle r and the inner mounting angles p and q are adjusted by the laser positioning machine, and the loupe 2 is moved by the mounting portion 3 to the carrier lens. Fix to 5. The mounting portion 3 is composed of an adapter for fixing the loupe 2 and a ring for tightening the adapter with the carrier lens 5 sandwiched therebetween. The adapter is mounted at the lower mounting angle r and the inner side with respect to the surface of the carrier lens 5. It is configured to be held and fixed at angles p and q. Further, in order to fix the loupe 2 to the carrier lens 5, the loupe 2 may be fitted into the opening while being maintained at the lower mounting angle r and the inner mounting angles p and q, and bonded with an adhesive.

  The present invention relates to a binocular loupe used in medical surgery and precision work, and a method for producing a binocular loupe suitable for the left and right eye pupil positions and work postures according to the characteristics of each worker. Have industrial applicability.

DESCRIPTION OF SYMBOLS 1 Frame 2 Loupe 3 Attaching part 5 Carrier lens 8 Marker 10 Binocular loupe 11 Camera 13 Strobe light irradiation device 18 Laser measuring instrument P Work operation place p, q Inner mounting angle r of left and right loupes Lower mounting angle

Claims (16)

A binocular loupe is produced by attaching a loupe to a carrier lens mounted on a frame under conditions according to a binocular loupe wearer,
(A) attaching a square marker having four interior angles of 90 ° to the frame;
(B) imaging the wearer's face from the work operation location when the wearer of the frame is staring at the lower work operation location in a working posture when using a binocular loupe;
(C) detecting the marker by an oblique image of the face taken from below;
(D) The forward tilt angle α of the carrier lens is calculated from the degree of change in the shape of the marker from the square to the trapezoid detected in the image processing step, and the loupe is attached to the carrier lens based on the forward tilt angle α. Determining a lower mounting angle r at the time,
(E) XY on the carrier lens surface when the wearer of the frame stares at the work operation position below by specifying a position where the brightness changes discontinuously from the image Identifying a right eye pupil position QR (XR, YR) and a left eye pupil position QL (XL, YL) on an axis;
(F) The forward tilt angle is an angle when each cornea is rotated downward along with the movement of the left and right pupils when the line of sight of the wearer of the frame shifts from a posture looking at the horizontal direction to the working posture. α and the tilt angle δ of the carrier lens with respect to the vertical line, and based on the angle, the Y coordinate values of the right eye pupil position QR and the left eye pupil position QL are corrected, and the left and right loupes Determining a mounting right loupe mounting coordinate position Q′R and a left loupe mounting coordinate position Q′L on the carrier lens surface;
(G) Left and right based on the distance in the X coordinate direction from each of the right eye pupil position QR and the left eye pupil position QL to the center point C of the marker and the distance L from the center point C to the work operation point P Determining each inner mounting angle p, q of the loupe to be mounted on the surface of the carrier lens of
(H) Open to the left and right carrier lens surfaces based on the right loupe mounting coordinate position Q′R and the left loupe mounting coordinate position Q′L, the lower mounting angle r, and the inner mounting angles p and q. And inserting and fixing the left and right loupes in the opening,
A method for producing a binocular loupe comprising the steps of:   2. The binocular loupe according to claim 1, wherein in step (c), an image characteristic specific to a face is extracted from the image to detect a face, and the marker is detected from a detected image of the face. Method.   The step (c) is characterized in that the marker is detected by converting the detected image of the face into a polyline and extracting one having an angle close to approximately 90 degrees from those having four angles. Item 3. A binocular loupe manufacturing method according to Item 2.   The binocular loupe manufacturing method according to claim 3, wherein, in the step (c), coordinate positions on the XY axes of the four corners of the marker in the oblique image are determined.   5. The method for manufacturing a binocular loupe according to claim 4, wherein, in the step (c), a coordinate position of a center is detected from the coordinate positions of the four corners of the marker.   In the step (c), the number of pixels per unit dimension in the image is obtained from the known actual dimensions of the marker, and the X and Y values of the coordinate position are represented by the number of pixels as coordinate values. A method for manufacturing a binocular loupe according to claim 4 or 5.   In the step (d), based on the top and bottom dimensions of the trapezoid derived from the coordinate position, the actual vertical / horizontal dimension ratio of the marker, and the distance from the work operation location to the center point of the marker The binocular loupe manufacturing method according to claim 4, wherein the forward tilt angle α is determined.   In the step (d), a line from the work operation point measured in advance at a distance M to the carrier lens and a horizontal line orthogonal to a vertical line passing through the carrier lens measured in advance at a distance N are used. 2. The method for manufacturing a binocular loupe according to claim 1, wherein the downward mounting angle r is determined based on an additional angle of a sandwiched angle and the forward tilt angle α. In the step (e), an eye image portion is extracted from the image, and the extracted eye image is binarized to detect an iris outline, whereby the right eye pupil position QR and the left eye pupil position QL are detected. The method for manufacturing a binocular loupe according to claim 1, wherein: In addition to the angle, the correction of the Y coordinate value in the step (f) further includes a distance V between the cornea and the carrier lens and a distance M from the work operation location to the surface of the carrier lens. The method for manufacturing a binocular loupe according to claim 1 , wherein: The method for manufacturing a binocular loupe according to claim 10, wherein the distance M to the surface of the carrier lens is measured by a distance measuring sensor using ultrasonic waves or infrared rays . In the step (f) , the right eye pupil position QR and the left eye pupil position QL are corrected according to the deviation between the center line v1 in the vertical direction of the face and the center line v2 in the vertical direction of the marker. The method of manufacturing a binocular loupe according to claim 1 . In the step (f) , when the center line v1 and the v2 center line are displaced due to skew, the Y coordinate values YR and YL of the right eye pupil position QR and the left eye pupil position are calculated as described above. 13. The method for manufacturing a binocular loupe according to claim 12, wherein the correction is performed based on an angle [gamma] that intersects with each other . In the step (f) , when there is a shift in which the center line v1 and the v2 center line are parallel to each other with an interval t, each of the right eye pupil position QR and the left eye pupil position is determined. 13. The method for manufacturing a binocular loupe according to claim 12 , wherein the X coordinate values XR and XL are respectively corrected based on the interval t . The binocular loupe manufacturing method according to claim 14 , wherein the interval t is obtained from a difference between an X coordinate value of an intermediate position between the left and right pupil positions and an X coordinate value of a center point C of the marker . In the step (f) , even after the Y coordinate values YR and YL of the pupil position are corrected based on the angle γ, the center line v1 and the v2 center line are shifted in parallel with an interval t ′. 14. The method for producing a binocular loupe according to claim 13 , wherein the X-coordinate values XR and XL of the pupil position are respectively corrected based on the interval t ′ .

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