JP2007093636A - Spectacle wearing parameter measuring instrument, spectacle lens, and spectacles - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To manufacture optimal dedicated spectacle lenses or spectacles for spectacle wearers respectively. <P>SOLUTION: A spectacle wearing parameter measuring instrument 30 for measuring spectacle wearing parameters of a spectacle wearer includes a movable unit 34 for setting the spectacle wearer wearing a spectacle frame to a measurement position of a far viewing or near viewing state, a light source 56, lenses 60, imaging cameras 62 and 63 which photograph the spectacle wearer set to the far viewing or the near viewing state and take in his or her images, and an instrument controlling terminal 32 for measuring and operating the spectacle wearing parameters on the basis of these obtained photographic images. The spectacle wearing parameters are at least one of a distance vision inter-pupil distance, a near vision inter-pupil distance, a distance vision spectacle wearing distance, a near vision spectacle wearing distance, a spectacle frame wearing angle, an eyeball rotation angle, and a near vision target distance, and the instrument controlling terminal uses spectacle wearing parameters, spectacle lens data, and spectacle frame data to determine layout information of spectacle lenses to the spectacle frame. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention captures an image of a spectacle wearer wearing a spectacle frame, measures various spectacle wearing parameters required to produce spectacles from the image, and determines layout information for the spectacle frame of the spectacle lens. The present invention relates to a spectacle wearing parameter measuring device, a spectacle lens, and spectacles.

  In the production of spectacles, optical design is performed according to spectacle prescription values, selection of spectacle frames, and various spectacle wearing parameters related to spectacle wearers, and spectacle lenses manufactured based on the design values are shaped into spectacle frames. It is necessary to cut so that it is put into a frame in accordance with The spectacle wearing parameters related to the spectacle wearer include a distance vision pupil distance, a distance vision pupil distance, a distance vision distance (vertex distance), a spectacle frame wearing angle, and the like.

  Conventionally, various optical measurement methods are known for measuring the spectacle wearing parameters. For example, in a spectacle store, a purometer (PD meter) is mainly used, and the distance between the far vision pupil and the distance between the near vision pupils of the spectacle wearer is measured as a spectacle wearing parameter. Although this method can obtain an accurate value to some extent, it requires a spectacle wearer to take an unnatural posture and looks into the device, so that there are variations in measured values unlike a natural spectacle wearing environment.

As an apparatus that overcomes these disadvantages, Video-Infral of Carl Zeiss described in Patent Document 1 is known. This apparatus is used in a spectacle store, and uses two video cameras and one reflector to obtain a front image and a side image of a spectacle wearer. In order to determine the center position of the eye of the spectacle wearer, a tangent line that touches the spectacle frame shape is traced in a rectangular shape using a mouse-type pointing device on these images. Thereafter, on the front image of the spectacle wearer, the relative position of the pupil of the spectacle wearer with reference to the spectacle frame, that is, the distance between the far vision pupils as the spectacle wearing parameter is measured. Furthermore, on the side image of the spectacle wearer, the inclination angle of the spectacle frame when the vertical line is the reference (that is, the spectacle frame wearing angle as the spectacle wearing parameter) and the apex of the cornea based on the spectacle frame position The distance between vertices, that is, the distance for wearing spectacles as a spectacle wearing parameter, is measured.
JP-A-8-47481 (page 3)

  According to the conventional apparatus described in Patent Document 1, the distance between the far vision pupil, the spectacle frame wearing angle, and the distance between the vertices are mainly measured, and the distance between the vertices takes into consideration the three-dimensional shape of the spectacle frame. Therefore, it cannot be said that the distance spectacle wearing distance is actually used as a spectacle wearing parameter, and this value cannot be used effectively. In other words, in order to measure and calculate the distance spectacle wearing distance and the near vision spectacle wearing distance as spectacle wearing parameters, data relating to the three-dimensional shape of the spectacle frame such as the frame tilt angle is necessary. There has been no device for measuring and calculating the distance for wearing far vision glasses and the distance for wearing near vision glasses.

  Further, in the apparatus described in Patent Document 1, the near-eye spectacle wearing distance, which is a spectacle wearing parameter related to the near vision necessary for the spectacle lens including the progressive addition lens, the eyeball rotation angle in the near vision, and the near It is not possible to measure and set the target distance for viewing. Furthermore, the eyeball rotation angle and the near vision target distance in this near vision state are changed according to the spectacle wearer, the optimum near vision state for the spectacle wearer is detected, and the spectacle wearer is photographed in that state. There was no device.

  In addition, the spectacle wearing parameters necessary to produce a spectacle lens for refractive power correction (progressive power lens, multifocal lens, single focus lens for near use, single focus lens, etc.) according to the prescription of the individual spectacle wearer There was no device that could be selected and measured.

  An object of the present invention has been made in consideration of the above-described circumstances, and measures spectacle wearing parameters necessary for the production of spectacles with high accuracy, measured values of the spectacle wearing parameters, lens information of spectacle lenses, and spectacles. It is an object of the present invention to provide a spectacle wearing parameter measurement device capable of producing a dedicated spectacle lens or spectacles that is optimal for an individual spectacle wearer by obtaining layout information of the spectacle lens with respect to the spectacle frame using the frame information of the frame.

  The spectacle wearing parameter measuring device according to the first aspect of the present invention is a spectacle wearing parameter measuring device for measuring spectacle wearing parameters required for producing spectacles suitable for a spectacle wearer. The person is set to a distance vision state or a near vision state, and in this near vision state, at least one of the eyeball rotation angle and the near vision target distance can be arbitrarily changed, and the fixation means The eyeglass wearer set to the far vision state or the near vision state is photographed by the photographing device, the image wearing means for capturing the image, and the eyeglass wearing parameters are measured based on the captured image obtained by the image input means. A spectacle wearing parameter that is measured and calculated by the measurement calculating means, the distance between the distance vision pupil, the distance between the near vision pupil, and the distance vision eyewear Distant, near vision spectacle wearing distance, spectacle frame wearing angle, eyeball rotation angle, near vision target distance, and further, spectacle wearing parameters obtained by the measurement calculation means, the refractive index of the lens, Eyeglass lens including any of eyeglass lens data including eyeglass lens shape data, eyeglass lens prescription data, layout mark data, and target lens shape data, target lens center distance, and frame tilt angle. The frame information is used to determine layout information for the spectacle frame of the spectacle lens.

  According to a second aspect of the present invention, there is provided the spectacle wearing parameter measuring apparatus according to the first aspect of the present invention, wherein the distance between the far vision pupil distance and the near vision pupil distance is measured by the measurement calculation means according to the frame information. Drawing means for drawing the frame shape of the mold shape data on the photographed image of the spectacle wearer, and moving means for moving the frame shape drawn by the drawing means so as to substantially match the frame image on the photographed image And calculating the distance between the pupils of the left and right eyes on the photographed image and the frame shape of the target lens shape data, and calculating the distance between the left and right eye pupils, Is calculated.

  According to a third aspect of the present invention, in the spectacle wearing parameter measuring device according to the first or second aspect of the invention, the layout means includes a frame shape of target lens shape data based on frame information on a photographed image of the spectacle wearer. The image of the desired spectacle lens having the layout mark is drawn and superimposed, and the layout information determined by the layout means confirms whether the spectacle frame and the spectacle lens are combined properly. Is included.

  According to a fourth aspect of the present invention, there is provided the spectacle wearing parameter measuring device according to any one of the first to third aspects, wherein the lens processing information is based on the layout information for the spectacle frame of the spectacle lens obtained by the layout means. It has the process calculating means which calculates.

  According to a fifth aspect of the present invention, in the spectacle wearing parameter measuring apparatus according to the fourth aspect of the present invention, the processing calculation means may determine the spectacle lens reference point and the spectacle lens from the layout information of the spectacle lens with respect to the spectacle frame. The lens processing information is calculated based on a positional deviation amount from the lens center of the frame or a distance between a reference point of the spectacle lens and an under rim of the spectacle frame.

  According to a sixth aspect of the present invention, in the spectacle wearing parameter measuring device according to the fourth or fifth aspect of the present invention, at least a position for fixing the lens processing jig is included in the lens processing information obtained by the processing calculation means. Information is included.

  The spectacle lens according to the invention of claim 7 performs optical design using at least one of the spectacle wearing parameters measured by the spectacle wearing parameter measurement device according to any one of claims 1 to 6, The eyeglass lens is manufactured by processing based on the layout information for the eyeglass frame.

  An eyeglass according to an eighth aspect of the present invention is manufactured using the spectacle lens according to the seventh aspect.

  According to the first aspect of the present invention, the spectacle wearer is set to the far vision state or the near vision state, and in this near vision state, at least one of the eyeball rotation angle and the near vision target distance is arbitrarily changed. A fixation means that can be obtained; an image input means that captures an image of a spectacle wearer set in a distance vision state or a near vision state by the fixation means; Since it has measurement calculation means for measuring and calculating the above spectacle wearing parameters based on the captured image, the spectacle wearing parameters for far vision and near vision can be measured with high accuracy.

  Whether the layout unit can lay out the spectacle lens with respect to the spectacle frame using the spectacle wearing parameter measurement value obtained by the measurement calculation unit, the lens information of the spectacle lens, and the frame information of the spectacle frame. Therefore, the spectacle lens can be manufactured by designing a dedicated spectacle lens that is most suitable for each spectacle wearer.

  Furthermore, since the lens information of the spectacle lens includes any one of the refractive index of the lens, spectacle lens prescription data, spectacle lens shape data, and layout mark data, the layout information in the state where the actual spectacle lens is worn. Calculation can be performed, and the layout state of the spectacle lens with respect to the spectacle frame can be confirmed well even in the case of a progressive power lens.

  Further, since the frame information of the spectacle frame includes any one of the target lens shape data, the target lens center distance, and the frame tilt angle, the distance spectacle wearing distance and the distance spectacle wearing distance are set to It can be calculated in consideration of the three-dimensional shape of the frame. For this reason, each of the distance vision glasses wearing distance and the near vision glasses wearing distance is corrected by the above three-dimensional shape, so that these distance vision glasses wearing distance and near vision glasses wearing distance are measured with high accuracy. be able to.

  According to the invention described in claim 2, when measuring the distance between the far vision pupil and the distance between the near vision pupils of the spectacle wearing parameters, the frame shape of the lens shape data based on the frame information is determined by the drawing means and the moving means. The frame image on the photographed image is substantially matched. As a result, it is possible to accurately measure the distance between the bridge center position of the frame shape of the target lens shape data and the pupil center position of the left and right eyes on the captured image, and accurately measure the distance between the one-eye far vision pupils of the left and right eyes individually. The distance between the near vision pupils can be calculated with high accuracy.

  According to the third aspect of the present invention, the layout means draws the frame shape of the target lens shape data based on the frame information on the photographed image of the spectacle wearer, and further draws the image of the desired spectacle lens having the layout mark. Since the eyeglass lens is determined by checking the appropriateness of the combination of the eyeglass frame and the eyeglass lens, it is possible to select the most suitable eyeglass lens for the eyeglass frame. Glasses can be provided.

  According to the invention described in claim 4 or 5, since the processing calculation means calculates the lens processing information based on the layout information of the spectacle lens with respect to the spectacle frame, a dedicated spectacle lens optimum for each individual of the spectacle wearer is obtained. It can be processed to produce eyeglasses.

  According to the invention described in claim 6, since the lens processing information includes at least position information (centering position) for fixing the lens processing jig, accurate centering is performed based on the position information. As a result, the edge of the spectacle lens can be processed.

  According to the seventh aspect of the present invention, an optical design is performed using the spectacle wearing parameters measured with high accuracy by the spectacle wearing parameter measuring device, and the spectacle lens is processed based on the layout information of the spectacle lens with respect to the spectacle frame. Therefore, this spectacle lens can be a dedicated spectacle lens that is most suitable for each individual spectacle wearer whose spectacle wearing parameters have been measured.

  According to the invention described in claim 8, the optical design is performed using the spectacle wearing parameters measured with high accuracy, and the spectacle lens is manufactured by processing based on the layout information for the spectacle frame of the spectacle lens. The spectacles in which the spectacle lens is mounted on the spectacle frame can be dedicated spectacles that are optimal for individual spectacle wearers whose spectacle wearing parameters have been measured.

The best mode for carrying out the present invention will be described below with reference to the drawings.
FIG. 1 is a diagram showing a connection relationship between one embodiment of a spectacle wearing parameter measurement apparatus according to the present invention and other devices, and is a communication line diagram in a spectacle store or an ophthalmic clinic. FIG. 2 is a side view of the spectacle wearing parameter measuring apparatus in FIG. 3 is a view taken in the direction of arrow III in FIG.

  A spectacle wearing parameter measuring device 30 shown in FIG. 1 measures spectacle wearing parameters for producing spectacles suitable for a spectacle wearer, determines layout information for spectacle frames of spectacle lenses, and calculates lens processing information. And has a measuring device main body 31 and a device control terminal 32. Here, the spectacle wearing parameters are the distance vision pupil distance, the distance vision pupil distance, the distance vision spectacle wearing distance, the near vision spectacle wearing distance, the spectacle frame wearing angle, the eyeball rotation angle, and the near vision target distance. At least one. These spectacle wearing parameters will be described below with reference to FIGS.

  The distance between the far vision pupils is the distance between the pupils of the left eye 82 and the right eye 83 when gazing at a distance of 5 m or more, and is the FPD of the far vision front image in FIG. The near-eye pupil distance is a distance between the pupils of the left eye 82 and the right eye 83 when an object at a near vision target distance (usually about 20 to 60 cm) is gaze, It is NPD of a visual front image. In FIG. 21, the distance for distance vision (distance between vertices) is the distance from the back surface of the spectacle lens 13 on the distance vision axis 17 of the spectacle wearer to the corneal apex of the eyeball (eye 11 to be examined) of the spectacle wearer. Yes, A in the figure. The near vision distance is the distance from the back surface of the spectacle lens 13 on the near vision axis 18 of the spectacle wearer to the apex of the cornea of the eyeball (eye 11 to be examined) of the spectacle wearer in FIG. B inside. Further, VR in the figure indicates the distance from the corneal apex of the eye 11 to be examined to the eyeball rotation point 12.

  In general, in a near vision state (for example, reading), the subject who is a spectacle wearer rotates the eye 11 around the rotation point 12 of the eyeball (the eye 11 to be examined), lowers the line of sight, and performs near vision. Observe the target (object for near vision). The eyeball rotation angle θ is an angle formed by the two visual axes 17 and 18 when the line of sight is lowered from the distance visual axis 17 to the near visual axis 18 around the rotation point 12. The near vision target distance is the distance from the eye (test eye 11) to the near vision object when observing the near vision object in the near vision state, and is NL in the figure. In addition, FL in a figure is the distance from the eye (examined eye 11) when observing a distance vision target object in a distance vision state to a distance vision object.

  As shown in FIG. 23, the angle formed by the temple 16 and the rim 15 of the spectacle frame 14 is generally referred to as a frame inclination angle. The spectacle frame wearing angle in the present embodiment is the distance visual axis of the spectacle wearer in the far vision state. Suppose that 17 is an optical axis and an angle α formed by a straight line perpendicular to the optical axis and a target lens shape formed by the rim 15 of the spectacle frame 14. Further, the frame tilt angle differs depending on each spectacle frame 14, and in FIG. 24, refers to an angle β formed by the target lens formed by the rim 15 with respect to the bridge 19 when the spectacle frame 14 is observed from directly above.

  As shown in FIG. 2, the measuring device main body 31 includes a frame unit 33 including a pair of curved track frames 36, a movable unit 34 that moves on the track frame 36, and a wearer who is a spectacle wearer. And a positioning unit 35 for positioning the face of the examiner 10.

In the frame unit 33, a support frame 38 is erected on a base 37, and the track frame 36 is erected on the base 37 and is supported by being leaned on the support frame 38. A rack rail 39 is laid on the track surface of each track frame 36.
As shown in FIG. 3, a positioning main frame 40 and a positioning subframe 41 of the positioning unit 35 are erected on the base 37. A chin rest 42 on which the chin of the subject 10 is placed and a forehead support 43 on which the forehead of the subject 10 is applied are provided on the upper portion of the positioning main frame 40. The forehead support 43 is supported by the chin rest 42 via the forehead support post 44, and a reference mark 45 for matching the eye height of the subject 10 is provided on the forehead support post 44. .

  Incidentally, as shown in FIGS. 4 and 5, a pair of drive gears 47 that can rotate synchronously are rotatably disposed on the unit frame 46 of the movable unit 34. Similarly, a pair of drive gears 48 are rotatably disposed. These drive gears 47 and 48 mesh with the rack rail 39 of the track frame 36. Further, a guide roller 49 is rotatably supported on the unit frame 46 on the opposite side of the drive gears 47 and 48, and these guide rollers 49 are fitted to the rear rail portion 50 of the track frame 36.

  A rotation motor 51 is further installed on the unit frame 46, and a worm 52 is integrally attached to the motor shaft of the rotation motor 51. The worm 52 meshes with a worm wheel 53 provided on a shaft connecting a pair of drive gears 47, and the driving force of the rotation motor 51 is transmitted to the drive gear 47 via the worm 52 and the worm wheel 53, and further the timing. It is transmitted to the drive gear 48 via the belt 54. The drive gears 47 and 48 mesh with the rack rail 39 of the track frame 36 and are driven to rotate by the rotation motor 51. At this time, the guide roller 49 rolls on the back rail portion 50 of the track frame 36, so that the movable unit 34 is It rotates along the curved shape of the track frame 36. As shown in FIG. 2, the center of rotation of the movable unit 34 is designed to be the rotation point 12 of the eyeball of the subject 10 positioned by the positioning unit 35.

  As shown in FIGS. 4 and 5, a drive screw 55 is erected on the unit frame 46 of the movable unit 34 so as to be rotatable about its axis. A light source support portion 57 that supports a light source 56 such as a light emitting diode (LED) is screwed to the drive screw 55. The unit frame 46 is provided with a light source motor 58, and the driving force of the light source motor 58 is transmitted to the drive screw 55 through the timing belt 59 to rotate the drive screw 55. Thereby, the light source 56 is provided so as to be movable in a direction approaching or moving away from a lens 60 described later via the light source support portion 57.

  The lens 60 is installed on the unit frame 46 of the movable unit 34, and the light source 56 is disposed on the optical axis of the lens 60. The movable unit 34 having the lens 60 and the light source 56 constitutes a fixation means for installing the spectacle wearer wearing the spectacle frame at each measurement position in the far vision state or the near vision state. The measurement positions of the far vision state and the near vision state are set by moving the light source 56 toward or away from the lens 60 and simultaneously rotating the movable unit 34 along the curved shape of the track frame 36. Realized by moving.

  That is, as shown in FIG. 6, by setting the distance between the light source 56 and the lens 60 to an arbitrary distance, an image of the light source 56 in the far vision state and the near vision state is displayed on the subject 10 who is a spectacle wearer. Observe as a fixation lamp (distant vision object, near vision object). At the same time, by rotating the movable unit 34 along the curved shape of the track frame 36, the far-sighted state measurement position (FIG. 6A) is far away in the substantially horizontal direction of the eye 11 in the subject 10. An image of the light source 56 is generated on the visual axis 17, and at the near vision state measurement position (FIG. 6B), a predetermined eyeball rotation angle θ downward from the far visual axis 17 of the subject eye 11 in the subject 10. An image of the light source 56 is generated on the near visual axis 18 that has been rotated only by that amount. Thus, setting of each measurement position in the far vision state and the near vision state is realized.

  In particular, at the near vision state measurement position shown in FIG. 6B, the eyeball rotation angle θ can be arbitrarily changed by moving the movable unit 34 to an arbitrary position along the curved shape of the track frame 36. Furthermore, the near vision target distance NL can be arbitrarily changed by adjusting the distance between the light source 56 and the lens 60. Note that either one of the eyeball rotation angle θ and the near vision target distance NL may be configured to be changeable. In this embodiment, the light source 56 is connected to and separated from the lens 60 and is used for both far vision and near vision. However, the far vision light source and the near vision light source are separately provided. May be provided.

  As shown in FIGS. 4 and 5, a half mirror 61 functioning as a beam splitter is disposed on the unit frame 46 of the movable unit 34 below the lens 60 in the drawing. The half mirror 61 is disposed at an angle of 45 ° so as to reflect the light emitted from the light source 56 and direct it toward the positioning unit 35. Then, a front imaging camera 62 as a photographing device is installed behind the half mirror 61 in the unit frame 46. The front imaging camera 62 is, for example, a CCD camera having an imaging lens.

  As shown in FIG. 2, when the movable unit 34 rotates along the curved shape of the track frame 36 around the rotation point 12 of the eyeball (the subject's eye 11) of the subject 10, Similarly, the installed front imaging camera 62 is rotated. At this time, as shown in FIG. 6, the optical axis of the front imaging camera 62 is held in a state that always coincides with the far vision axis 17 or the near vision axis 18 of the subject 10. Accordingly, the front-side imaging camera 62 takes images of the front of the face of the subject 10 installed at the measurement positions in the far vision state or the near vision state by the movable unit 34 through the half mirror 61 and images thereof. Capture. Although the transmission / reflection ratio of the half mirror 61 is 7: 3, it is not particularly defined. The distance between the half mirror 61 and the eye of the subject 10 positioned by the positioning unit 35 is set to about 70 cm.

  As shown in FIGS. 2 and 3, the side surface imaging camera 63 and the mirrors 64 and 65 are installed on the positioning subframe 41 of the positioning unit 35. The side imaging camera 63 is, for example, a CCD camera installed at the lower left side of the chin rest 42 in FIG. 3 and having an imaging lens. The mirror 64 is installed in the vicinity of the side imaging camera 63 and the mirror 65 is installed in the vicinity of the forehead support 43 and inclined at 45 °. As shown in FIG. 7, the side surface of the face of the subject 10 set at the measurement position in the far vision state or near vision state by the movable unit 34 is sequentially reflected by the mirror 65 and the mirror 64 and used for the side surface. The image is taken by the imaging camera 63 and the image is captured. The front imaging camera 62, the half mirror 61, the side imaging camera 63, and the mirrors 64 and 65 function as imaging input means.

  As shown in FIG. 2, a frame unit 33 including the track frame 36 and a movable unit 34 including a light source 56, a lens 60, a half mirror 61, a front imaging camera 62, and the like are covered with a cover 66. As shown in FIGS. 3 and 8, the cover 66 is provided with a far vision window 27 and a near vision window 28 on the front side. As shown in FIG. 2, the far vision window 27 is formed at a position where the far vision axis 17 of the subject eye 11 crosses the cover 66 in the far vision state of the subject 10 whose face is positioned by the positioning unit 35. Is done. Further, the near vision window 28 is a position where the near vision axis 18 of the subject eye 11 crosses the cover 66 in the near vision state of the subject 10 whose face is similarly positioned by the positioning unit 35. When the eyeball rotation angle θ is changed, the near visual axis 18 is formed in a region where the eyeball rotates.

  The apparatus control terminal 32 shown in FIG. 1 stores the program software shown in FIG. 9 and activates the fixation lamp driving program software that can be set to the far vision state or the near vision state. Thus, the rotating motor 51 is driven and controlled to rotate the movable unit 34, the light source motor 58 is driven and controlled to move the light source 56, and the eyeball among the spectacle wearing parameters in the near vision state as described later. The rotation angle θ and the near vision target distance NL are determined.

  In addition, the device control terminal 32 activates the measurement program software to display on the monitor a captured image that is captured by the front imaging camera 62 and the side imaging camera 63 and temporarily stored in the device control terminal 32. Based on this captured image, the distance vision pupil distance FPD, the distance vision pupil distance NPD, the distance vision eyeglass wear distance A, the distance vision eyeglass wear distance B, and the eyeglass frame wear angle α among the eyeglass wear parameters. It functions as a measurement and calculation means for measuring and calculating. Further, the magnification correction program software of the program software has a function of correcting and matching the magnifications of the images captured by the front imaging camera 62 and the side imaging camera 63 as described later.

  Further, the apparatus control terminal 32 functioning as a measurement calculation means calculates an inset amount as described later using the distance vision spectacle wearing distance a, the near vision target distance NL, and the like, and calculates an addition degree and the like. .

  Further, the device control terminal 32 activates the spectacle layout simulation program software shown in FIG. 9, whereby the spectacle wearing parameter V, the lens information of the spectacle lens 13 (spectacle lens data W), and the spectacle frame 14 are displayed. Using the frame information (eyeglass frame data Z), it functions as a layout means for determining layout information indicating whether or not the eyeglass lens can be laid out on the eyeglass frame. Furthermore, the device control terminal 32 functions as a processing operation unit that calculates lens processing information for edge-processing the spectacle lens based on the layout information and the like by starting the lens processing information calculation program software. .

  These layout information and lens processing information will be described later. The spectacle lens data W includes lens refractive power, spectacle lens shape data (convex and concave curvature radii, lens center thickness, etc.), spectacle lens prescription data (described later), layout mark data (distant eye shown in FIG. 32). Point 90, distance reference circle 91, near reference circle 92, horizontal reference line 93, optical center 94, small ball shape 95, etc.). Further, the spectacle frame data Z is measured by, for example, the frame tracer 74 (FIG. 1) and the like, and the target lens shape data (the target shape data formed by the rim 15), the target lens center distance BCL ( The distance between the centers of the two target lenses of the spectacle frame 14), the frame tilt angle β, and the frame material are included.

  The spectacle wearing parameter measurement procedure executed by the device control terminal 32 will be described first with reference to the flowchart shown in FIG. 20, and will be described in detail later.

  First, power is supplied to the spectacle wearing parameter measurement device 30 to activate the device control terminal 32 (S1), and calibration for magnification correction of the captured image by the front imaging camera 62 and the side imaging camera 63 is performed. This is executed as necessary (S2). Next, customer personal data, lens prescription data, and spectacle frame data are input from the outside, and the near vision target distance NL and the eyeball rotation angle θ are arbitrarily input (S3).

  Thereafter, the eye of the subject 10 who is a spectacle wearer is aligned with the reference mark 45 (FIG. 3) of the positioning unit 35, and the eye 10 is aligned in the vertical direction (S4). In this state, the fixation lamp is turned on about 5 meters ahead, and images of the front and side faces of the subject 10 in the distance vision state are taken (S5).

  Next, while the fixation lamp is turned on, the near vision target distance NL and the eyeball rotation angle θ are arbitrarily changed, and these near visions are confirmed while confirming the near vision state suitable for the subject 10. The target distance NL and the eyeball rotation angle θ are determined (S6). In this state, the front and side images of the face of the subject 10 in the near vision state are taken (S7).

  Based on the captured far vision and near vision images and data input from the outside, the spectacle wearing parameters (far vision pupil distance FPD, near vision pupil distance NPD, far vision glasses wearing distance A, near vision The eyeglass wearing distance B and the eyeglass frame wearing angle α) are measured and calculated (S8). Then, these measured spectacle wearing parameters are stored in the device control terminal 32 together with the captured image, and are stored in the customer database 71 via the spectacle store terminal 70 (S9).

  After the above-described operations S1 to S9 by the spectacle wearing parameter measuring device 30, the spectacle store terminal 70 stores data of individual spectacle wearers (customer personal data X, spectacles) necessary for producing spectacles stored in the customer database 71. The lens prescription data Y, the spectacle frame data Z, the spectacle wearing parameter V, etc.) are transmitted to a spectacle manufacturer's factory server (not shown) to order spectacle lenses or spectacles (S10). Each operation described above will be described in further detail.

[Startup (S1)]
In FIG. 1, when power is supplied to the measurement device main body 31 of the spectacle wearing parameter measurement device 30, the device control terminal 32 connected to the measurement device main body 31 is activated.

[Calibration (S2)]
Since the two shooting cameras 62 and 63 for shooting the front face image and the side face image may have different magnifications, the shooting menu screen (FIG. 11) displayed on the monitor of the device control terminal 32 may be used as necessary. The calibration button 67 is selected to execute calibration. In this calibration, the magnification difference between the photographing cameras 62 and 63 is obtained in advance from the images obtained by photographing the scales and the like in advance by the two photographing cameras 62 and 63, and the front image and the side image are obtained based on the magnification difference. The error correction by the magnification difference is performed.

[Data input (S3)]
Next, customer personal data X, spectacle lens prescription data Y, and spectacle frame data Z are input using, for example, a data input screen as shown in FIG. 10 displayed on the monitor of the device control terminal 32. Although these data can be input manually, the data can be automatically read from the outside in order to save this time and eliminate input errors.

  For example, in FIG. 10, when customer personal data X is registered in advance, it can be automatically input from the customer file of the customer database 71 (FIG. 1) via the spectacle store terminal 70 when an ID number or the like is input. The spectacle lens prescription data Y is obtained by operating the button 73 (FIG. 10) if the device control terminal 32 of the spectacle wearing parameter measurement device 30 and the optometer 72 (phoropter, autorefractometer, etc.) can be connected. Can be transferred. The spectacle frame data Z including the frame tilt angle β is also obtained by operating the button 75 (FIG. 10) if the device control terminal 32 of the spectacle wearing parameter measuring device 30 and the frame tracer 74 (FIG. 1) can be connected. Can be transferred. As described above, the frame tilt angle β can be obtained from the trace data of the spectacle frame 14 measured by the frame tracer 74. As another acquisition method, for example, by the imaging camera 62 or 63 of the spectacle wearing parameter measurement device 30. It is also possible to photograph the spectacle frame 14 and obtain it from the image.

  In addition, SPH of the spectacle lens prescription data Y shown in FIG. 10 is spherical power (unit: dpt), CYL is astigmatism power (unit: dpt), AXS is astigmatic axis (unit: °), and PX is X-direction prism power (unit). : Dpt), PY is the Y-direction prism power (unit: dpt), and PD is the interpupillary distance (unit: mm).

Further, if the near vision target distance NL and the eyeball rotation angle θ of the spectacle wearer are known, those data are respectively stored in the “near vision distance” and “near vision angle” columns of the data input screen of FIG. input. In this embodiment, the eyeball rotation angle θ (that is, the near vision angle) is input, but the progressive zone length L (the distance eyepoint center and the near eyepoint center used in the progressive power lens is used). (Distance) may be used. This is because, as shown in FIG. 21, the following equation is simply established between the eyeball rotation angle θ and the progressive zone length L.
L = P × tanθ
Here, P is the distance from the eyeball rotation center (rotation point 12) to the spectacle lens 13, and normally 27 mm is used. In this case, the above formula is a simple formula that does not consider the spectacle frame wearing angle α and the like, and the value of P may be different for each spectacle wearer, but it is a certain standard. An eyeball rotation angle θ is calculated from the progressive zone length L to allow a spectacle wearer to look closer, and if necessary, this eyeball rotation angle θ is finely adjusted.

[Vertical alignment (S4)]
After the data is input, the chin rest 42 or the base 37 is moved up and down with the jaw of the subject 10 placed on the chin rest 42 of the positioning unit 35 shown in FIG. The eye of the subject 10 (that is, the spectacle wearer) when viewed from the side is matched with the reference mark 45 of the forehead support column 44 by moving the eye.

[Shooting in the far vision state (S5)]
After completion of data input using the data input screen of FIG. 10, the shooting menu screen shown in FIG. 11 is displayed on the monitor of the device control terminal 32. When the far vision button 68 on this shooting menu screen is selected, the light source 56 is turned on at the far vision state measurement position in FIG. The light source 56 serves as a fixation lamp. In this far vision state, for example, when it is desired to set the target distance of the fixation lamp viewed by the subject 10 who is a spectacle wearer to about 5 m, the light source 56 is moved on the optical axis of the lens 60, and the half mirror 61 and Adjustment is performed so that an image (virtual image) of the light source 56 is formed in the vicinity of 5 m behind these 61 and 60 via the lens 60.

  The subject 10 observes the light source image as a fixation lamp, and the examiner confirms that the subject's line of sight is horizontal and that the face is not tilted on the imaging screen (far vision) shown in FIG. Then, the height of the base 37 or the subject chair is adjusted so that the eye of the subject 10 falls within the upper and lower reference lines in FIG. After confirming the horizontal state of the line of sight of the subject 10 and that the eyes are within the upper and lower reference lines, the imaging button 76 displayed on the monitor of the device control terminal 32 is operated, and the front imaging camera At 62, a front face image of the subject 10 in the distance vision state is captured. At the same time, the side face image of the subject 10 in the far vision state is imaged by the side imaging camera 63 shown in FIGS. 3 and 7.

[Shooting in near vision state (S6, S7)]
After the front and side face images are captured in the far vision state, when the near vision button 69 is selected on the shooting menu screen (FIG. 11) of the device control terminal 32, the movable unit 34 measures the far vision state in FIG. 6 (A). From the position to the near vision state measurement position in FIG. 6B, the eye 11 rotates along the trajectory frame 36 around the rotation point 12 of the eye 11 and the light source 56 of the movable unit 34 is on the optical axis of the lens 60. In this embodiment, an aerial image (real image) is formed 30 to 50 cm ahead of the subject 10 in this embodiment, and this image is observed by the subject 10 as a fixation lamp.

  If the eyeball rotation angle θ and the near vision target distance NL in near vision of the subject 10 are known, those values have already been entered using the data input screen (FIG. 10). The light source 56, which is a fixation lamp, is rotated by the movable unit 34 so that an aerial image of the fixation lamp is formed at the eyeball rotation angle θ and the near vision target distance NL. Automatic control to move on the axis is provided. It is confirmed on the imaging screen (near vision) shown in FIG. 14 that the subject 10 is observing the fixation lamp, and the eye of the subject 10 enters the upper and lower reference lines in FIG. Then, the photographing button 77 displayed on the monitor of the device control terminal 32 is operated, and a front face image of the subject 10 in the near vision state is imaged by the front imaging camera 62. To do. At the same time, the side face image of the subject 10 in the near vision state is imaged by the side imaging camera 63 shown in FIGS. 3 and 7.

  When the eyeball rotation angle θ and the near vision target distance NL in the near vision state of the subject 10 are not known, “Near vision distance” “Near vision” on the imaging screen (near vision) in FIG. An arbitrary numerical value is input in the “viewing angle” field, the set button 78 is operated, the light source 56 is rotated by the movable unit 34 to a position that matches the input numerical value, and is moved on the optical axis of the lens 60. . From this state, the eyeball rotation angle θ and the near vision target distance NL are changed to confirm the near vision state suitable for the subject, and the eyeball rotation angle θ and the near vision target distance NL in the near vision state are confirmed. Are detected as the eyeball rotation angle θ to be obtained and the near vision target distance NL. Thereafter, the photographing button 77 is operated in the same manner as described above, and the front face image and the side face image in the near vision state are photographed by the imaging cameras 62 and 63, respectively.

  For example, as one method, the near vision target distance NL is fixed, and the light source 56 is rotated by the movable unit 34 to change the eyeball rotation angle θ (near vision angle), so that the eyeglass rotation angle optimum for the spectacle wearer is obtained. Find θ. Thereafter, the spectacle rotation angle θ is held, the light source 56 is moved on the optical axis of the lens 60 to change the near vision target distance NL, and the optimum near vision target distance NL is obtained. The reverse is also possible.

[Measurement and calculation of wearing parameters (S8)]
In order to measure and calculate various spectacle wearing parameters required for producing spectacles using the image acquired in this way, an operation menu screen on the monitor of the device control terminal 32 (FIG. 12). Then, the interpupillary distance measurement button 80A and the wearing angle / wearing distance measurement button 81 are arbitrarily selected, and the respective measurement programs (FIG. 9) are activated.

  When the interpupillary distance measurement button 80A is selected, the interpupillary distance measurement program is activated, and at the same time, as shown in FIGS. 15 and 16A, a front image obtained by imaging the front face of the subject 10 in the far vision state is displayed. It is displayed on the monitor of the device control terminal 32. This image is displayed on the monitor after magnification correction (calibration). Then, on the front image of the subject 10 in the distance vision state, for example, the pupil center positions of the left eye 82 and the right eye 83 are obtained by the following detection method, and the distance between the pupil centers is determined between the distance vision pupils. The distance is FPD.

  As a first detection method, the pupil center positions of the left eye 82 and the right eye 83 are directly designated by a pointing device such as a mouse, and the apparatus control terminal 32 measures the distance on the screen. As a second detection method, a pupil center position is automatically obtained by image processing. In this second detection method, in order to shorten the image processing time, the pupil vicinity region 89 is dragged with the mouse as shown by the broken line in FIG. Next, in this image, the scanning line 84 of the image is scanned to determine a change in the amount of reflected light. Since the pupil portion of the eye to be examined (the left eye 82 and the right eye 83) is dark, the amount of reflected light is greatly reduced at the pupil portion as shown in FIG. Accordingly, the portion where the amount of reflected light is reduced is detected as a pupil region to determine the pupil center position, and the distance between these pupil centers is converted to determine the distance vision pupil distance FPD.

  In the present embodiment, the pupil center position may be obtained using either the first detection method or the second detection method, or may be obtained by another method. The center of the face (for example, the center of the nasal column) or the center of the bridge 19 of the spectacle frame is designated by a pointing device or the like, and the distance from the center to the pupil center of the left eye 82 and the distance to the pupil center of the right eye 83 are set. You may obtain | require as a left eye FPD (L-FPD) and a right eye FPD (R-FPD), respectively, and you may obtain | require these and add distance FPD between distance vision.

  The near vision interpupillary distance NPD can be obtained by the same operation, but the near vision state is different from the far vision state in that the line of sight approaches the inside due to convergence. Therefore, the distance between the pupils of the left eye 82 and the right eye 83 in the near vision pupil distance measured in the same manner as the distance vision pupil distance FPD, that is, in the front image of the subject 10 in the near vision state. The distance between the near vision pupils measured from the distance is a distance on the eye 11 to be examined. Referring to FIG. 17, when producing the spectacle lens 13, it is necessary to calculate where the line of sight passes on the surface of the spectacle lens 13 fitted into the rim 15 of the spectacle frame 14 in the near vision state. The distance between the near vision pupils on the surface of the spectacle lens 13 is the distance between the near vision pupils NPD to be obtained.

A method of obtaining the near vision pupil distance NPD on the surface of the spectacle lens 13 from both front images of the subject 10 in the far vision and near vision states will be described with reference to FIG. In order to simplify the description, the frame tilt angle β and the spectacle frame wearing angle α (described later) are set to 0 °. In FIG. 17, the distance from the corneal apex of the eye to be examined 11 to the rotation point 12 is a (corresponding to VR in FIG. 21), the distance for wearing far vision glasses is b (corresponding to A in FIG. 21), When the distance difference between the corneal apex position and the near vision corneal apex position is c, the inward amount d is expressed by the following equation.
d = c (a + b) / a
If the distance between the far vision pupil and the distance between the near vision pupils on the surface of the spectacle lens 13 is FPD and NPD, respectively, the distance between the far vision pupils FPD is equal to the distance between the pupils of the front image in the distance vision. The interpupillary distance NPD is expressed by the following equation.
NPD = FPD-2 · d
Here, the distance a from the corneal apex to the turning point 12 is usually 13 mm in many cases, but other values may be used. In order to obtain the near vision pupil distance NPD more accurately, it is necessary to correct using the frame tilt angle β and the spectacle frame wearing angle α, but this is omitted here.

  Next, the wearing angle / wearing distance measurement button 81 is selected on the operation menu screen (FIG. 12) of the device control terminal 32. Then, first, the eyeglass frame wearing angle measurement program (FIG. 9) is started, and at the same time, as shown in FIG. 18, the side surface of the subject 10 in the far vision state of the subject 10 corrected for magnification on the monitor of the device control terminal 32. An image is displayed. This side image is used to measure the spectacle frame wearing angle α and the far vision spectacle wearing distance A. On the screen shown in FIG. 18, the apex of the cornea of the eye 11 to be examined is designated with a pointing device such as a mouse, and the optical axis, that is, the far vision axis 17 is drawn by drawing a horizontal line. The spectacle frame wearing angle α is an angle formed by the rim 15 of the spectacle frame 14 with respect to a straight line 85 perpendicular to the optical axis (far vision axis 17). In order to determine the spectacle frame wearing angle α, two or four points are designated by a pointing device such as a mouse along the side surface shape of the rim 15 of the spectacle frame 14, and a straight line 86 is displayed by calculation from these coordinate values. The angle formed by the straight line 86 and the straight line 85 is set as a spectacle frame wearing angle α.

  After the measurement of the spectacle frame wearing angle α, the spectacle wearing distance measurement program (FIG. 9) is started. Since the spectacle frame wearing angle α is already known, first, a reference straight line 87 that is parallel to the straight line 86 from which the spectacle frame wearing angle α is obtained and passes through the apex of the cornea is displayed. A straight line 88 parallel to the reference straight line 87 is generated on the screen, and the straight line 88 is translated by a pointing device such as a mouse and moved to the position of the rim 15 of the spectacle frame 14. The distance between the straight line 88 that has moved to the position of the rim 15 and the reference straight line 87 is measured and used as a temporary disposition distance. Since the actual distance vision spectacle wearing distance A is affected by the three-dimensional shape of the spectacles such as the frame tilt angle β and the lens curve, the spectacle wearing distance measurement program can execute the trace data of the spectacle frame 14 and the lens curve (spectacle lens shape data). ) Is calculated, and the distance A for distance vision spectacles is calculated by taking into account the calculated value and the distance for temporary wearing.

  The near vision glasses wearing distance B can also be obtained by a similar operation. That is, the side image of the face of the subject 10 in the near vision state is displayed on the monitor of the device control terminal 32, and the corneal apex of the eye 11 to be examined is designated with a pointing device such as a mouse on this image. Since the eyeball rotation angle θ is known, the optical axis passing through the corneal apex, that is, the near vision axis 18 is drawn according to the eyeball rotation angle θ. The distance between the apex of the cornea on the near vision axis 18 and the rim 15 of the spectacle frame 14 is measured and set as a distant distance. Since the actual near vision spectacle wearing distance B is affected by the three-dimensional shape of the spectacles such as the frame tilt angle β and the lens curve, the trace data and the lens curve of the spectacle frame 14 are read and calculated, and the calculated value and the above The near vision glasses wearing distance B is calculated in consideration of the temporary wearing distance.

  Since the far-sighted spectacle wearing distance A, the near-sighted spectacle wearing distance B, the spectacle frame wearing angle α, and the eyeball rotation angle θ shown in FIG. 21 have already been measured and calculated, the device control terminal 32 is connected to the eye 11 to be examined. The progressive zone length L is calculated by setting the distance VR from the corneal apex to the eyeball rotation point 12 to 13 mm. This progressive band length L is not only useful for selecting the type of progressive-power lens, but is also a necessary and important parameter for designing a progressive-power lens optimum for the spectacle wearer. Although the distance VR from the corneal apex of the eye 11 to the eyeball rotation point 12 is 13 mm, this is a value generally used in Japanese, and in the case of Westerners, 14 mm is often used. . 21 shows a case where the progressive surface is on the eye side of the spectacle lens 13, but when the progressive surface is on the object side of the spectacle lens 13, the progressive zone length L is calculated in consideration of the thickness of the lens.

[Data save (S9)]
The device control terminal 32 displays the spectacle wearing parameters V obtained as described above together with the customer personal data X and the spectacle frame data Z, for example, in the form of a list display on the storage screen shown in FIG. 32 and the customer database 71. At this time, the captured image is also saved.

[Glasses Lens and Glasses Order (S10)]
The spectacle wear parameters of each spectacle wearer stored in the device control terminal 32 of the spectacle wear parameter measuring device 30 and the customer personal data 71 (FIG. 1) are sent to the factory server of the spectacle manufacturer (not shown) by the spectacle store terminal 70. It is sent and a spectacle lens or spectacles is ordered.

  For presbyopic spectacle lenses such as progressive-power lenses, far vision and near vision spectacle wearing parameters are required, but in the case of near-focus single focus lenses, far vision spectacle wearing parameters are not required Therefore, it is possible to omit shooting in the far vision state. In the case of a single focus lens for hyperopia or myopia, the glasses wearing parameters for near vision are not necessary, and photographing in the near vision state can be omitted. In this way, the spectacle wearing parameters are arbitrarily selected and measured by the spectacle wearing parameter measuring device 30 according to the type of spectacle lens worn by the spectacle wearer, and transmitted to the factory server of the spectacle manufacturer by the spectacle store terminal 70. .

  Next, in the above-described spectacle wearing parameter measurement procedure (steps S1 to S10 in FIG. 20), the distance vision inter-pupil distance FPD and the distance vision inter-pupil distance NPD in step S8 are used as the spectacle frame from the frame tracer 74. A procedure different from the above, which is measured using the data Z, will be described.

  In this case, the wearing angle / wearing distance measurement button 81 is selected on the operation menu screen (FIG. 12) of the device control terminal 32, and the glasses frame wearing angle α and the far vision glasses wearing distance A are the same as described above. Then, the near vision spectacle wearing distance B and the progressive zone length L are calculated.

  Thereafter, the interpupillary distance measurement button 80B is selected on the operation menu screen (FIG. 12) of the device control terminal 32. Then, an interpupillary distance measurement program different from that described above is activated, and a front image of the subject 10 in the far vision state is displayed on the monitor of the device control terminal 32 as shown in FIG. This screen is displayed on the monitor after magnification correction (calibration) is performed. Then, on the front image of the subject 10 in the far vision state, the respective pupil center positions of the left eye 82 and the right eye 82 are obtained by using one of the above-described two detection methods or another detection method. The distance vision pupil distance FPD is measured.

  For example, when the right eye pupil center button 101 on the screen of FIG. 25 is selected, a cursor 102 is displayed on this screen, and the cursor 102 is moved to match the right eye 83 of the front image, and the OK button 103 is selected. By determining the position of the cursor 102, the position of the pupil center 97 of the right eye 83 is obtained from the center position of the cursor 102. Next, by selecting the left eye pupil center button 100 on this screen, the position of the pupil center 96 of the left eye 82 is similarly obtained using the cursor 102. A distance vision inter-pupil distance FPD is calculated from the distance between the pupil center 96 of the left eye 82 and the pupil center 97 of the right eye 83. The value of the distance vision inter-pupil distance FPD is displayed on the screen (for example, the “PD, Binocular” column in FIG. 26).

  The front image of the subject 10 displayed in FIG. 25 may be taken with the face tilted. When the image tilt correction button 104 is selected after obtaining the positions of the pupil centers 96 and 97 as described above, the face tilt state is calculated from the positions of the pupil centers 96 and 97, and this value is used. Then, the inclination correction of the front image is executed.

  After the tilt correction, the frame shape 105 obtained from the lens shape data of the spectacle frame data Z measured by the frame tracer 74 is drawn and displayed on the front image of the subject 10 as shown in FIG. To do. The device control terminal 32 has drawing means for drawing the frame shape 105 on the front image. The apparatus control terminal 32 functioning as the drawing means considers the frame tilt angle β of the spectacle frame data Z, the spectacle frame wearing angle α measured before the spectacle wearing parameter V, and the photographing magnification. The frame shape 105 is drawn on the front image of the person 10. The frame shape 105 drawn on the front image of the subject 10 is the frame shape of the spectacle frame 14 of the spectacles worn when the subject 10 was photographed by the spectacle wearing parameter measurement device 30. .

  Then, by operating the movement operation button 106 on the front image shown in FIG. 26, the frame shape 105 on the front image is moved up, down, left and right, and this frame shape 105 is changed to the frame image 107 of the spectacle frame 14 in the front image. Match. The device control terminal 32 includes a moving unit that moves the frame shape 105 by operating the movement operation button 106. The position of the frame shape 105 is determined by operating the OK button 108 after the frame shape 105 obtained from the spectacle frame data Z matches the frame image 107 on the front image.

  From the distance between the bridge center position 109 (FIG. 27) in the frame shape 105 in which this position has been determined and the pupil center 96 of the left eye 82 measured as described above, the distance between the left eye far vision pupils (left eye FPD; L-FPD) is calculated, and the right-eye distance pupil distance (right-eye FPD; R-FPD) is calculated from the distance between the bridge center position 109 and the pupil center 97 of the right eye 83. This calculation method eliminates the need to operate the pointing device as compared with the method of designating the center of the face (for example, the center of the nose column) or the center of the bridge 19 of the spectacle frame 14 on the image with a pointing device or the like. There are few advantages. The values of the left eye FPD and the right eye FPD are displayed, for example, in the columns of “far PD, left eye” and “far PD, right eye” in FIG.

  After measuring the distance vision interpupillary distance FPD, the left eye FPD, and the right eye FPD as described above, the inset amount (synonymous with the above-mentioned inset amount) is calculated to calculate the near vision pupil distance NPD. Further, the addition power is calculated. This calculation such as joining is calculated from the age from the customer personal data X input on the data input screen (FIG. 10) and the value of the near vision target distance NL measured in advance. This addition value is also displayed on the screen of FIG.

ただし、Ｒは遠用処方値であり、図１０のデータ入力画面に入力された球面度数ＳＰＨおよび乱視度数ＣＹＬを用いて、
Ｒ＝ＳＰＨ＋ＣＹＬ／２
として算出されるものである。 The inset amount is displayed with a signal “i” in FIG. FIG. 28 shows a case where the object N at the near vision target distance L (corresponding to NL in FIG. 21) is viewed through the spectacle lens 13. In FIG. 28, the distance from the corneal apex of the eye to be examined 11 to the rotation point 12 is t (corresponding to VR in FIG. 21), the distance for wearing the far vision glasses is d (corresponding to A in FIG. 21), When the eye FPD is P, the left eye or right eye inset amount i is obtained by the following equation. (See Glasses Science Vol.7, 1983, P14-30)

However, R is a distance prescription value, and using the spherical power SPH and the astigmatism power CYL input on the data input screen of FIG.
R = SPH + CYL / 2
Is calculated as follows.

After calculating the left eye inset amount and the right eye inset amount as described above, the left eye near vision pupil distance (left eye NPD) and the right eye near vision pupil distance (right Each eye NPD) is calculated.
Left eye NPD = Left eye FPD−Left eye inset amount Right eye NPD = Right eye FPD−Right eye inset amount Then, these left eye NPD and right eye NPD are added to calculate the near vision pupil distance NPD To do.

  The left-eye inset amount and the right-eye inset amount calculated as described above are displayed in the “inset amount, left eye” and “inset amount, right eye” columns of the screen of FIG. Further, the values of the left eye NPD, right eye NPD, and near vision pupil distance NPD are also shown in the screen of FIG. 27 as “Near PD, Left Eye”, “Near PD, Right Eye”, “Near PD, Both It is displayed in each column of “Eye”.

  Next, a case will be described in which spectacles layout simulation and lens processing information calculation (step S11 in FIG. 20) are executed after measuring and calculating various spectacle wearing parameters in step 8 in FIG. In this spectacle layout simulation and the like, the case where the spectacle lens 13 is a progressive power lens and a bifocal lens will be described, and in the case of a single focus lens, the description is omitted because it is simpler than both lenses.

  In order to execute this spectacle layout simulation and lens processing information calculation, the spectacle layout simulation (lens processing information calculation) button 110 is selected on the operation menu screen (FIG. 12) of the device control terminal 32. Then, first, the eyeglass layout simulation program software (FIG. 9) is activated, and as shown in FIG. 29, the subject 10 photographed on the monitor of the apparatus control terminal 32 for the purpose of measuring the distance between the far vision pupils. In the front image, an image in which the frame shape 105 obtained from the lens shape data of the spectacle frame data Z is drawn is displayed. Similar to the image of FIG. 27, this image is an image in which the inclination of the image is corrected and the frame shape 105 matches the frame image 107 of the photographed image.

  On the screen of FIG. 29, the frame shape 105 is displayed, and the respective values of the lateral dimension AA, the longitudinal dimension BB, and the inter-center distance BCL of the target lens shape of the frame shape 105 are displayed. The value of EPH which is the distance between the under rim 123 of the frame shape 105 and the pupil center 97 (or the pupil center 96) is displayed. Further, on the screen of FIG. 29, the values of the distance vision inter-pupil distance FPD, the left eye FPD, and the right eye FPD are displayed as the spectacle wearing parameter V, and the position where the near line of sight passes through the spectacle lens 13. A near eye point 111 representing is displayed. The near eye point 111 is calculated from the inset amount i (left eye, right eye), eyeball rotation angle θ, and distance vision spectacle wearing distance b.

  In the screen of FIG. 29, when the lens type 13 is selected by inputting the lens type in the “lens manufacturer name” and “lens product name” fields, and the OK button 112 is operated, as shown in FIGS. In addition, the lens images 113 and 120 of the selected desired spectacle lens 13 are drawn on the image of FIG. These lens images 113 and 120 and layout marks described later are displayed with the aspect ratio changed according to the frame tilt angle β and the spectacle frame wearing angle α, as in the case of the frame shape 105.

  When a progressive-power lens is selected as the spectacle lens 13, a lens image 113 of the progressive-power lens is obtained by using a distance eye point 90, a distance reference circle 91, as shown in FIGS. It has layout marks such as a near reference circle 92 and a horizontal reference line 93, and the far eye point 90 is displayed in alignment with the pupil centers 96 and 97 of the front image of the subject 10. At this time, the diameter of the lens image 113 is calculated and displayed based on the values of the spectacle frame data Z, the left eye FPD, and the right eye FPD. The distance reference circle 91 indicates that the distance power is set in the circle, and the near reference circle 92 indicates that the distance power is set in the circle.

  The position adjustment button 114 is operated as necessary on the image of FIG. 30, and the left and right lens images 113 are normally moved in the vertical direction at a pitch of 0.5 mm (or 0.1 mm), for example. In addition, the movement of the lens image 113 in the left-right direction is usually performed by operating the position adjustment button 114, and the left and right lens images 113 are usually linked in the inward or outward direction, for example, 0.5 mm (or 0). .1mm) Adjust the pitch. A minus sign “−” is displayed beside the position adjustment button 114 at the time of inward alignment, and a plus sign “+” is displayed beside the position adjustment button 114 at the time of outward alignment. When the positions of the left and right lens images 113 are individually adjusted, the position adjustment button 114 is operated after the L button 115 or the R button 116 is operated. The individual operation of the left and right lens images 113 is canceled by operating the L button 115 or the R button 116 again.

  The position adjustment of the lens image 113 using the position adjustment button 114 as described above is executed so that the near eye point 111 is within the near reference circle 92. When the glasses place special importance on near vision, the position of the lens image 113 is further adjusted so that the near reference circle 92 is within the frame shape 105. However, since the distance eye point 90 of the lens image 113 is displaced from the pupil centers 96 and 97 of the front image of the subject 10 due to the position adjustment of the lens image 113, in consideration of this point, The position adjustment of the lens image 113 is performed. Each time the position of the left and right lens images 113 is adjusted by the position adjustment button 114, the necessary minimum diameter of the lens image 113 is changed and displayed. When the position adjustment is completed, the OK button 119 is operated to determine the positions of the left and right lens images 113.

  When a bifocal lens is selected as the spectacle lens 13, the lens image 120 of this lens has a layout mark such as an optical center 94 and a small ball shape 95 as shown in FIGS. 31 and 32B. And the optical center 94 is displayed so as to coincide with the pupil centers 96 and 97 of the front image of the subject 10. At this time, the diameter of the lens image 120 is calculated and displayed based on the spectacle frame data Z, the values of the left eye FPD and the right eye FPD. A near power is set in the small ball shape 95.

  The position adjustment of the lens image 120 is also performed using the position adjustment button 114, the L button 115, and the R button 116. First, the position of the small ball shape 95 is adjusted so that the upper end portion of the small ball shape 95 matches the lower eyelid of the front image of the subject 10, and then the near eye point 111 is near the center of the small ball shape 95. The position of the lens image 120 is adjusted so as to fit. Each time the position adjustment of the lens image 120 is performed by the position adjustment button 114, the necessary minimum diameter of the lens image 120 is changed and displayed. When the position adjustment is completed, the position of the left and right lens images 120 is determined by operating the OK button 112.

  In this way, the spectacle lens 13 is determined by confirming whether the spectacle lens 13 and the spectacle frame 14 are properly combined, that is, whether the spectacle lens 13 is properly laid out with respect to the spectacle frame 14. Appropriateness of the layout of the spectacle lens 13 with respect to the spectacle frame 14, determination of the spectacle lens 13 based on the suitability, the position of the distance eyepoint 90 of the spectacle lens 13 determined, and the near eyepoint by changing the distance The far-sighted spectacle wearing distance A and the near-sighted spectacle wearing distance B at which the position 111 is changed are determined as layout information by the device control terminal 32 as the layout means.

  After execution of the eyeglass layout simulation as described above, the lens processing information calculation program software (FIG. 9) is activated. Then, the same image as when layout information is determined (for example, an image in which the frame shape 105 and the lens image 113 or 120 are superimposed on the frame image 107 as shown in FIG. 30 or FIG. 31) is shown in FIG. 33, the values of the spectacle frame data Z such as the horizontal dimension AA, the vertical dimension BB, and the lens center distance BCL of the frame shape 105, the distance between the far vision pupils FPD, and the left eye FPD are displayed on the screen of FIG. Then, the operator checks whether or not the value of the spectacle wearing parameter V such as the right eye FPD is appropriate. Further, when the spectacle lens 13 is a progressive power lens, whether or not the near eye point 111 is within the near reference circle 92 of the lens image 113, and when the spectacle lens 13 is a bifocal lens. The operator confirms whether or not the near eye point 111 is in the vicinity of the center of the small ball shape 95 of the lens image 120.

  After confirming the values of the spectacle frame data Z and the spectacle wearing parameter V, for example, when the OK button 122 is operated, the spectacle lens 13 is trimmed based on the spectacle wearing parameter V, the spectacle frame data Z, and the layout information. Lens processing information is calculated. This lens processing information includes a case where the frame lens center BC is used as a reference (FIG. 34A) and a case where the under rim 123 is used as a reference (FIG. 34B).

  The processing information is calculated based on the frame lens center. First, the point where the center line of the horizontal dimension AA and the center line of the vertical dimension BB in the frame shape 105 on the screen of FIG. And Next, how much the distance eye point 90 of the lens image 113 (in the case of a progressive power lens) or the optical center 94 of the lens image 120 (in the case of a bifocal lens) is displaced with respect to the frame lens center BC. The amount of misalignment is calculated. These misregistration amounts are obtained as (ΔX−L, ΔY−L) for the left eye, and (ΔX−R, ΔY−R) for the right eye and are used as lens processing information.

  The processing information based on the under rim 123 is first calculated on the screen of FIG. 33 by the under rim 123 and the distance eye point 90 (in the case of a progressive power lens) in the frame shape 105 or the optical center 94 (bifocal). The distance to the lens) is determined with the left and right eyes as YL and YR, respectively. Next, the distance from the bridge center position 109 of the frame shape 105 to the distance eye point 90 (in the case of a progressive power lens) or the optical center 94 (in the case of a bifocal lens) is set as XL and XR. Calculate with the eyes. Note that the values of XL and XR are the values of the left eye FPD and the right eye FPD, respectively, when the lens images 113 and 120 are not inward or outward in the spectacles layout simulation (FIGS. 30 and 31). A value can be used. The lens processing information is (XL, YL) for the left eye and (XR, YR) for the right eye.

  Further, the lens processing information includes information on a fixed position of a lens holder 124 (FIG. 36) as a lens processing jig to be attached to the spectacle lens 13 when the spectacle lens 13 is edged. In other words, the lens holder 124 is generally formed on the convex surface 13A of the spectacle lens 13 with the axis 125 of the lens holder 124 aligned with the frame lens shape center BC, the distance eye point 90, or the optical center 94 of the spectacle lens 13. It is mounted using an adhesive sheet 126. Accordingly, the lens processing information includes the frame lens center BC of the spectacle lens 13, the distance eye point 90, and the optical center 94 as fixed position information of the lens holder 124.

  In the spectacles layout simulation and the calculation of the lens processing information described above, the progressive band length L calculated from the measurement value of the spectacle wearing parameter V and the position of the near eye point 111 are the progressive band lengths of the existing spectacle lens 13. This is a case where the positions of L and near eye point 111 substantially coincide. When the progressive zone length L calculated from the measurement value of the spectacle wearing parameter V and the position of the near eye point 111 are significantly different from the progressive zone length L of the existing eyeglass lens 13 and the position of the near eye point 111 The optimum spectacle lens 13 is optically designed using the measured value of the spectacle wearing parameter V of each individual spectacle wearer, and the spectacle layout simulation and the calculation of the lens processing information are executed using the spectacle lens 13. .

  The layout information obtained by the above-described spectacles layout simulation and the lens processing information calculated from the layout information are used together with the spectacle wearing parameters V and the device control terminal 32 and the customer database 71 in the same manner as in step S9 of FIG. Saved in. These layout information and lens processing information are transmitted together with the spectacle wearing parameters V and the like to a spectacle manufacturer's factory server (not shown) when ordering spectacle lenses and spectacles in the same manner as in step S9 of FIG. Lenses and eyeglasses are produced. When processing a spectacle lens in a store or the like, the above-described layout information and lens processing information are transferred to a lens processing machine to process the spectacle lens, thereby producing spectacles.

With the configuration as described above, the following effects (1) to (9) are achieved according to the above embodiment.
(1) The movable unit 34 (FIG. 2) including the light source 56 and the lens 60 sets the subject 10 who is a spectacle wearer to the far vision state or the near vision state, and in this near vision state, the eyeball At least one of the rotation angle θ and the near vision target distance NL can be arbitrarily changed, and the subject 10 set to the far vision state or the near vision state is captured by the front imaging camera 62 and the side imaging camera 63. The device control terminal 32 measures and calculates the spectacle wearing parameters based on the captured image obtained. Further, the device control terminal 32 is displayed so as to be movable on the captured image, and the pupil cursors 92 and 93 for detecting the center position of the pupil of the subject 10 and the vertex position of the cornea of the subject 10 are displayed. It has a corneal cursor 97 for detection. For these reasons, it is possible to measure the spectacle wearing parameters for far vision and near vision with high accuracy. As a result, it is possible to optically design a dedicated spectacle lens that is optimal for each individual spectacle wearer using at least one of the spectacle wearing parameters measured with high accuracy by the spectacle wearing parameter measurement device 30, and incorporating this spectacle lens, It is possible to manufacture dedicated glasses that are optimal for each individual person wearing the glasses.

  (2) Since the spectacle wearing parameters can be measured in each of the far vision state and the near vision state, the necessary spectacle wearing parameters can be selected according to the type of spectacle lens worn by the spectacle wearer. The measurement of the spectacle wearing parameter measurement apparatus 30 can be speeded up by omitting the spectacle wearing parameter measurement.

(3) The device control terminal 32 functioning as a layout means can lay out the spectacle lens 13 with respect to the spectacle frame 14 using the spectacle wearing parameter V measurement value, spectacle lens data W, and spectacle frame data Z. Since such layout information is determined, it is possible to produce spectacles by designing a dedicated spectacle lens that is optimal for each individual spectacle wearer.

  (4) Since the eyeglass lens data W includes any one of the refractive index of the lens, the eyeglass lens prescription data, the eyeglass lens shape data, and the layout mark data, the layout information with the actual eyeglass lens 13 worn. In particular, even in the case of a progressive-power lens, the layout state of the spectacle lens 13 with respect to the spectacle frame 14 can be confirmed satisfactorily.

  (5) Since the spectacle frame data Z includes any one of the target lens shape data, the target lens center distance BCL, the frame tilt angle β, and the frame material, the distance spectacle wearing distance A and the near vision The spectacle wearing distance B can be calculated in consideration of the three-dimensional shape of the spectacle frame 14. For this reason, the distance vision glasses wearing distance A and the near vision glasses wearing distance B are corrected by the above three-dimensional shape, thereby increasing the distance glasses wearing distance A and the near vision glasses wearing distance B. It can be measured with high accuracy.

  (6) When measuring the distance vision pupil distance FPD and the distance vision pupil distance NPD of the spectacle wearing parameter V, the frame shape 105 of the lens shape data based on the eyeglass frame data Z substantially matches the frame image 107 on the photographed image. Let As a result, it is possible to accurately measure the distance between the bridge center position 109 of the frame shape 105 and the pupil center positions 96 and 97 of the left and right eyes on the photographed image. The right eye FPD) can be measured with high accuracy, and the near vision pupil distance NPD can be calculated with high accuracy.

  (7) The frame shape 105 of the target lens shape data based on the spectacle frame data Z is drawn on the photographed image of the spectacle wearer (subject 10), and further, the distance eye point 90, the near reference circle 92, and the optical center 94 The lens images 113 and 120 of a desired spectacle lens having a layout mark such as a small ball shape 95 are drawn and overlaid, and the spectacle lens 13 is determined by checking the suitability of the spectacle frame 14 and spectacle lens 13 combination. From the above, by selecting the most suitable spectacle lens 13 for the spectacle frame 14, it is possible to provide the most suitable dedicated spectacles for each individual spectacle wearer.

  (8) Since the device control terminal 32 functioning as a processing calculation means calculates lens processing information based on the layout information of the spectacle lens 13 with respect to the spectacle frame 14, the dedicated spectacle lens 13 that is optimal for the individual of the spectacle wearer. Can be processed into glasses.

  (9) Since the lens processing information includes at least position information (centering position) for fixing the lens holder 124, the spectacle lens 13 is accurately centered using the lens holder 124 based on this position information, Edge trimming of the spectacle lens 13 or the like can be performed.

It is a communication line figure which shows the connection relation of one Embodiment of the spectacles wearing parameter measuring apparatus which concerns on this invention, and another apparatus. FIG. 2 is a side view showing the spectacle wearing parameter measurement device in FIG. FIG. 3 is a view taken in the direction of arrow III in FIG. 2. It is a side view which shows the movable unit of FIG. FIG. 5 is a view taken in the direction of arrow V in FIG. 4. FIGS. 3A and 3B are side views showing a situation when the measurement apparatus main body of FIG. 2 takes an image of a spectacle wearer, where FIG. 2A shows a far vision state measurement position, and FIG. 2B shows a photography situation at a near vision state measurement position. It is. It is a front view which shows roughly the arrangement | positioning condition of the imaging camera for side surfaces of FIG. 3, and a mirror. It is a perspective view which shows the cover of FIG.2 and FIG.3. It is a block diagram which shows the program software which the terminal for apparatus control of FIG. 1 stores. It is a figure which shows an example of the data input image for inputting spectacles wearer's data. It is a figure which shows an example of an imaging | photography menu screen. It is a figure which shows an example of an operation menu screen. It is a figure which shows an example of the imaging | photography screen for image | photographing the distance vision state of a spectacles wearer. It is a figure which shows an example of the imaging | photography screen for imaging | photography the near vision state of a spectacles wearer. It is a figure which shows an example of the measurement screen showing the front image in the distance vision state of a spectacles wearer. (A) is explanatory drawing at the time of measuring the distance vision pupil distance on the measurement screen of FIG. 15, (B) is a graph which shows the change of the reflected light amount on the binocular pupil of FIG. 16 (A). . It is explanatory drawing which shows the method of calculating | requiring the near vision pupil distance. It is a figure which shows an example of the measurement screen showing the side image in the distance vision state of a spectacles wearer. It is a figure which shows an example of the preservation | save screen of a spectacles wearing parameter. It is a flowchart which shows the measurement procedure of a spectacles wearing parameter, etc. It is explanatory drawing for demonstrating the distance vision spectacles wear distance, the near vision spectacles wear distance, the eyeball rotation angle, the near vision target distance, etc. among the spectacles wear parameters. Among the spectacle wearing parameters, (A) is a distance vision pupil distance, and (B) is an explanatory diagram for explaining a near vision pupil distance. It is explanatory drawing for demonstrating a spectacles frame wearing angle among spectacles wearing parameters. It is explanatory drawing for demonstrating a frame tilt angle. It is a figure explaining the procedure which designates a pupil center using the front image photoed for the purpose of distance vision interpupillary distance measurement. It is explanatory drawing which drawn the frame shape of the spectacles frame measured with the frame tracer on the front image of FIG. FIG. 27 is a diagram illustrating a procedure for adjusting the position of the frame shape of FIG. It is explanatory drawing for calculating the amount of insets (inset amount). It is a figure for drawing the frame shape measured with the frame tracer on the front picture photoed for the purpose of distance measurement between distance vision pupils, and selecting a spectacle lens. It is the figure which drawn and displayed the progressive-power lens which has a layout mark on the screen of FIG. It is the figure which drawn and displayed the bifocal lens which has a layout mark on the screen of FIG. FIG. 31A is a diagram showing a progressive-power lens having the layout mark of FIG. 30 and FIG. 31B is a diagram showing a bifocal lens having the layout mark of FIG. It is a figure for confirming the layout of a spectacle lens (progressive power lens) and calculating lens processing information. It is explanatory drawing for calculating the lens processing information on the basis of the frame target center BC. It is explanatory drawing for calculating the lens processing information on the basis of the under rim 123. It is sectional drawing which shows the state which mounted | wore the spectacle lens with the lens holder.

Explanation of symbols

10 Examinee (glass wearer)
12 rotation point 13 spectacle lens 14 spectacle frame 15 rim 17 far vision axis 18 near vision axis 30 spectacle wearing parameter measurement device 31 measurement device main body 32 device control terminal (measurement calculation means, layout means, processing calculation means)
34 Movable unit (fixation means)
36 Track frame 56 Light source (fixation means)
60 lens (fixation means)
62 Front imaging camera (imaging input means)
63 Side imaging camera (image input means)
90 Eyepoint for distance (reference point)
94 Optical center (reference point)
96, 97 Pupil center 105 Frame shape 107 Frame image 111 Near eye point 113, 120 Lens image 123 Under rim 124 Lens holder (Lens processing jig)
θ Eyeball rotation angle α Eyeglass frame wearing angle β Frame tilt angle FPD Distance between far vision pupils NPD Distance between near vision pupils A Distance with far vision glasses wearing distance B Distance between near vision glasses wearing distance NL Distance between near vision targets BCL Distance BC Frame center

Claims (8)

In a spectacle wearing parameter measuring apparatus for measuring spectacle wearing parameters necessary for producing spectacles suitable for a spectacle wearer,
Fixation means for setting a spectacle wearer wearing a spectacle frame to a far vision state or a near vision state, and in this near vision state, at least one of an eyeball rotation angle and a near vision target distance can be arbitrarily changed. And, based on the image input means for capturing the image of the spectacle wearer set in the distance vision state or the near vision state by the fixation means and capturing the image, and the captured image obtained by the image input means Measuring operation means for measuring and calculating the spectacle wearing parameters,
The spectacle wearing parameters measured and calculated by the above measurement calculation means are the distance vision pupil distance, the distance vision pupil distance, the distance vision eyewear distance, the near vision eyeglass wear distance, the eyeglass frame wearing angle, the eyeball rotation angle, the near eye angle. At least one of the target distances
Further, the spectacle wearing parameters obtained by the measurement calculation means, the lens refractive index, the spectacle lens shape data, the spectacle lens prescription data, the lens information including the layout mark data, and the lens shape Spectacles having layout means for determining layout information for spectacle frames of the spectacle lens using data, frame center distance, and frame information of spectacle frames including any of frame tilt angles Wear parameter measurement device. In the measurement of the distance vision pupil distance and the distance vision pupil distance by the measurement calculation means,
The drawing means for drawing the frame shape of the target lens shape data based on the frame information on the photographed image of the spectacle wearer, and the frame shape drawn by the drawing means is moved so as to substantially match the frame image on the photographed image. Moving means,
From the center positions of the left and right pupils of the left and right eyes on the captured image and the frame shape of the target lens shape data, the distance between the single-eye distance vision pupils for the left and right eyes is calculated, and the distance between the one-eye near vision pupils is calculated The spectacle wearing parameter measuring device according to claim 1.   The layout means draws the frame shape of the target lens shape data based on the frame information on the photographed image of the spectacle wearer, further draws and superimposes the image of the desired spectacle lens having the layout mark, and the layout means determines 3. The spectacle wearing parameter measurement apparatus according to claim 1, wherein the layout information to be included includes determining whether the spectacle lens is determined by confirming whether a combination of the spectacle frame and the spectacle lens is appropriate.   4. The spectacle wearing parameter measurement apparatus according to claim 1, further comprising a processing calculation unit that calculates lens processing information based on layout information of the spectacle lens with respect to the spectacle frame obtained by the layout unit.   The processing calculation means determines the amount of positional deviation between the reference point of the spectacle lens and the lens center of the spectacle frame or the under rim of the spectacle lens reference point and the spectacle frame from the layout information of the spectacle lens with respect to the spectacle frame. 5. The eyeglass wearing parameter measuring apparatus according to claim 4, wherein lens processing information is calculated based on a distance between the eyeglasses.   6. The spectacle wearing parameter measurement apparatus according to claim 4, wherein the lens processing information obtained by the processing calculation means includes at least position information for fixing the lens processing jig.   An optical design is performed using at least one of the spectacle wearing parameters measured by the spectacle wearing parameter measuring apparatus according to any one of claims 1 to 6, and the optical design is performed based on layout information of the spectacle lens with respect to the spectacle frame. An eyeglass lens manufactured by   An eyeglass produced using the eyeglass lens according to claim 7.

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