JP4514521B2 - Eyeglass wear parameter measurement device - Google Patents

Description

  The present invention relates to a spectacle wearing parameter measurement device that captures an image of a spectacle wearer wearing a spectacle frame and measures various spectacle wearing parameters required for producing spectacles from the image.

  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.

  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 invention described in Patent Document 1 does not describe a device for suppressing the induced stimulation and causing the gaze to be favorably performed when the spectacle wearer gazes at the target.

  An object of the present invention has been made in consideration of the above-described circumstances, and provides a spectacle wearing parameter measurement device that can suppress induced stimulation due to ambient light and allow a spectacle wearer to stare well at a fixation target. It is to provide.

  The spectacle wearing parameter measuring apparatus according to the invention of claim 1 is a spectacle wearing parameter measuring apparatus for measuring spectacle wearing parameters necessary for manufacturing spectacles suitable for a spectacle wearer. An optical member and an opening for allowing a spectacle wearer to visually recognize the visual target are linearly moved with respect to the optical member, and the fixation target is centered on an eyeball rotation point of the spectacle wearer. By rotating the eyeglass wearer, the eyeglass wearer is set to a distance vision state or a near vision state, and a fixation means for rotating the opening together with the fixation target, a distance vision state or a near vision state by the fixation means. A spectacle wearer set in a normal viewing state is photographed by a photographing device, and an image input unit that captures the image, and the spectacle wearer based on a captured image obtained by the image input unit. And a measurement calculating means for the parameters measured operation, the above-mentioned opening, its direction of movement on both sides, is characterized in that the shielding member for shielding external light is disposed.

  According to a second aspect of the present invention, there is provided the spectacle wearing parameter measuring apparatus according to the first aspect, wherein the fixation means includes a movable unit including a motor and a drive gear, and the drive gear is a pair of spectacles. Engage with the rack rail installed on the arc surface of the track frame having an arc surface centered on the eyeball rotation point of the wearer, and the drive gear is driven by the motor so that it is installed on the movable unit. The fixation target and the opening rotate together with the movable unit around the eye rotation point, and the movable unit is provided with shielding members that shield ambient light on both sides of the moving direction. To do.

  According to a third aspect of the present invention, there is provided the spectacle wearing parameter measuring device according to the second aspect, wherein each of the shielding members attached to both sides in the moving direction of the movable unit is wound around the winding drum. The drum is configured to take up or rewind the shielding member by the action of the spring force of the spring member wound in the reverse direction with the spring drum.

  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 shielding member is formed of a black cloth suede. is there.

According to a fifth aspect of the present invention, there is provided the spectacle wearing parameter measuring device according to any one of the first to fourth aspects, wherein the optical member has an imaging lens, and the fixation means in the fixation means is used. The target distance h to the imaging lens is set by the following equation, where e is the distance between the imaging lens and the eye of the eyeglass wearer, g is the target distance, and f is the focal length of the imaging lens. It is characterized by that.
h = (eg) f / (eggf)

  According to a sixth aspect of the present invention, in the spectacle wearing parameter measurement device according to any of the first to fifth aspects, the fixation target in the fixation means includes a fixation target for distance vision and a near vision target. The visual fixation target is provided independently.

  According to the first or fifth aspect of the invention, the fixation target is linearly moved with respect to the optical member, and the fixation target is rotated around the eyeball rotation point of the spectacle wearer. A fixation means for setting the person in a distance vision state or a near vision state, and a spectacle wearer set in the distance vision state or the near vision state by the fixation means by the imaging device, and recording the image Since the image input means and the measurement calculation means for measuring and calculating the spectacle wearing parameters based on the captured image obtained by the image input means, the spectacle wearing parameters for far vision and near vision can be easily obtained. The structure can measure with high accuracy. As a result, it is possible to design a dedicated spectacle lens optimal for each individual spectacle wearer based on the spectacle wearing parameters measured with high accuracy, and to manufacture spectacles.

  In addition, the opening in the fixation means for causing the spectacle wearer to visually recognize the fixation target rotates together with the fixation target, and shielding members for blocking ambient light are arranged on both sides of the opening in the opening direction. Thus, when the spectacle wearer visually recognizes the fixation target through the opening, the shielding member can shield the disturbance light and prevent the inside of the apparatus from being visually observed by the disturbance light. As a result, it is possible to suppress the induced stimulation due to the disturbance light, and it is possible to make the eyeglass wearer stare well at the fixation target.

  According to the second aspect of the present invention, the opening in the fixation means for causing the spectacle wearer to visually recognize the fixation target rotates together with the fixation target and the movable unit, and the movable unit includes the movement thereof. Since the shielding members for shielding the disturbance light are arranged on both sides in the direction, when the spectacle wearer visually recognizes the fixation target through the opening, the shielding member shields the disturbance light, and the disturbance light causes the device to The inside can be prevented from being visually observed. As a result, it is possible to suppress the induced stimulation due to the disturbance light, and it is possible to make the eyeglass wearer stare well at the fixation target.

  According to the third aspect of the present invention, each of the shielding members attached to both sides in the moving direction of the movable unit is wound around the winding drum, and the winding drum is wound in the reverse direction with the spring drum. Since the shield member is wound or unwound by the action of the spring force of the spring member that is applied, the tension applied to both shield members by the action of the spring force is independent of the moving position of the movable unit. Since it becomes constant, the rotational movement of the movable unit is not hindered by the presence of the shielding member. In addition, a driving source such as a motor is not required for winding or unwinding the shielding member.

  According to the fourth aspect of the present invention, since the shielding member is composed of black cloth suede, the shielding member can prevent disturbance light from being disturbed, so that the eyeglass wearer can more closely fix the fixation target. It can be made even better.

  According to the sixth aspect of the present invention, since the fixation target for distance vision and the fixation target for near vision are provided independently as the fixation target in the fixation means, a virtual image is formed. The distance fixation target and the near vision target are changed by changing the size of each of the aperture mechanism included in the distance vision fixation target and the aperture mechanism included in the near vision fixation target that forms a real image. The fixation target can be visually recognized in substantially the same size.

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, and includes a measuring device main body 31 and a device control terminal 32. Is done. 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 goal. 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. An angle α formed by a straight line orthogonal to the optical axis 17 and a target lens shape formed by the rim 15 of the spectacle frame 14 is defined as 17. 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 a track surface as a curved surface in each track frame 36. The track surface of the track frame 36 on which the rack rail 39 is laid is formed in a curved shape centered on the turning point 12 of the eye 11 of the eyeglass wearer (test subject 10) positioned by the positioning unit 35. . Therefore, the rack rail 39 laid on the raceway surface is also provided with a similar curved shape.

  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.

  Further, a pulse motor is installed on the unit frame 46 as a rotation motor 51, 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 Rotating movement is performed along the curved shape of the rack rail 39 in the track frame 36. As shown in FIG. 2, the center of rotation of the movable unit 34 is the center of the curved shape of the rack rail 39, which is the rotation point 12 of the eyeball of the subject 10 positioned by the positioning unit 35 as described above. Therefore, it is similarly designed to be the rotation point 12 of this eyeball.

  As shown in FIGS. 4 and 5, a drive screw 55 is rotatable around the axis of the unit frame 46 of the movable unit 34 and extends in the direction of the optical axis of the imaging lens 60 described later. Is done. A light source support 57 for supporting the light sources 56A and 56B such as a light emitting diode (LED) is screwed into 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. Accordingly, the light sources 56A and 56B are provided via the light source support portion 57 so as to be linearly movable in a direction approaching or separating from the imaging lens 60.

  The light source 56A that the eyeglass wearer visually recognizes in the near vision state functions as a near vision fixation target, and the light source 56B that the eyeglass wearer visually recognizes in the distance vision state serves as a distance vision fixation target. Function. The light source support 57 is provided with a plate-type beam splitter 20 inclined at 45 degrees so as to reflect the light from the light source 56B and guide it to the imaging lens 60. The light from the light source 56 </ b> A passes through the beam splitter 20 and is guided to the imaging lens 60. The transmission / reflection ratio of the beam splitter 20 is preferably set to 1: 1.

  In the light source support portion 57, pinholes (not shown) that function as a diaphragm are provided on the mounting surfaces 21 and 22 of the light source 56A and the light source 56B. Since the light source 56B as the fixation target for distance vision is visually recognized as a virtual image by the spectacle wearer who is the subject 10, the image magnification is higher than that of the light source 56A visually recognized as a real image by the spectacle wearer. Will be enlarged. Therefore, the pinhole provided in the mounting surface 22 in front of the light source 56B is more than the pinhole provided in the mounting surface 21 in front of the light source 56A so that the images of the light source 56A and the light source 56B have substantially the same size. Is also set to a small size.

  The imaging lens 60 is installed on the unit frame 46 of the movable unit 34, and the light sources 56 </ b> A and 56 </ b> B are disposed on the optical axis of the imaging lens 60. A plate-type beam splitter 61 is disposed on the unit frame 46 below the imaging lens 60 in the drawing. The beam splitter 61 is disposed at an angle of 45 ° so as to reflect the light emitted from the light sources 56A and 56B and direct it toward the positioning unit 35. The imaging lens 60 and the beam splitters 20 and 61 are optical members for allowing a spectacle wearer to visually recognize the light sources 56A and 56B.

  The light sources 56A and 56B, the optical member, and the movable unit 34 constitute 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 linearly moving the light sources 56A and 56B toward or away from the imaging lens 60 and simultaneously moving the movable unit 34 to the light sources 56A and 56B. And it is realized by rotating along the curved shape of the rack rail 39 in the track frame 36 together with the optical member.

  That is, as shown in FIG. 6, the distance between the light sources 56 </ b> A and 56 </ b> B and the imaging lens 60 is set to an arbitrary distance, whereby the light source 56 </ b> A is fixed to the subject 10 who is a spectacle wearer for the near vision fixation target. As the (near vision object), the light source 56B is observed as a far vision fixation target (far vision object). At the same time, by rotating the movable unit 34 along the curved shape of the rack rail 39 in the track frame 36, the abbreviated state of the eye 11 in the subject 10 at the far vision state measurement position (FIG. 6A). An image of the light source 56B is generated on the far vision axis 17 in the horizontal direction, and at the near vision state measurement position (FIG. 6B), a predetermined downward direction from the far vision axis 17 of the subject eye 11 in the subject 10 is determined. An image of the light source 56A is generated on the near vision axis 18 rotated by the eyeball rotation angle θ. 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 movable unit 34 rotates together with the light sources 56A and 56B and the optical member to an arbitrary position along the curved shape of the rack rail 39 in the track frame 36. Thus, the eyeball rotation angle θ can be arbitrarily changed, and further, the near vision target distance NL can be arbitrarily changed by adjusting the distance between the light source 56A and the imaging 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.

  As shown in FIGS. 4 and 5, a front imaging camera 62 as an imaging device is installed behind the beam splitter 61 in the unit frame 46 of the movable unit 34. The front imaging camera 62 is, for example, a CCD camera having an imaging lens.

  As shown in FIG. 2, the movable unit 34 rotates when it moves along the curved shape of the rack rail 39 in the track frame 36 around the rotation point 12 of the eyeball (the eye 11) of the subject 10. Similarly, the front imaging camera 62 installed in the movable unit 34 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. Therefore, the front imaging camera 62 takes an image of the front of the face of the subject 10 installed at each measurement position in the far vision state or the near vision state by the movable unit 34 through the beam splitter 61. Capture. Although the transmission / reflection ratio of the beam splitter 61 is 7: 3, it is not particularly defined. The distance between the beam splitter 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, beam splitter 61, side imaging camera 63, and mirrors 64 and 65 function as imaging input means.

  As shown in FIG. 2, the frame unit 33 including the track frame 36 and the movable unit 34 including the light sources 56A and 56B, the imaging lens 60, the beam splitters 20 and 61, the front imaging camera 62, and the like cover. 66. As shown in FIG. 3, the cover 66 has a far vision window 27 and a near vision window 28 opened 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 cover 66 further accommodates a viewing window 90 as an opening, an upper cloth suede 91 and a lower cloth suede 92 as shielding members, an upper winding drum 93 and a lower winding drum 94, and the like.

  The viewing window 90 constitutes a fixation means together with the light sources 56A and 56B, the optical member, and the movable unit 34. The viewing window 90 is formed on a mounting plate 95 fixed to the positioning frame 35 side of the movable unit 34. Accordingly, the viewing window 90 has the turning point 12 in the eye 11 of the subject 10 as a spectacle wearer whose movable unit 34 is positioned by the positioning unit 35 along the curved rack rail 39 in the track frame 36. Is rotated together with the light source 56A and the light source 56B.

  The upper cloth suede 91 and the lower cloth suede 92 are respectively attached to the upper side in the rotational movement direction of the attachment plate 95 provided with the viewing window 90 as shown in FIG. The upper cloth suede 91 is wound around the upper winding drum 93 installed on the support frame 38 of the frame unit 33. The lower cloth suede 92 is wound around the lower winding drum 94 installed on the base 37 of the frame unit 33. The upper cloth suede 91 and the lower cloth suede 92 follow the rotational movement of the movable unit 34, and are wound or rewound by the upper winding drum 93 and the lower winding drum 94, respectively, to block disturbance light, The inside of the measuring apparatus main body 31 is prevented from being visually recognized by the subject 10 due to ambient light. Further, the upper cloth suede 91 and the lower cloth suede 92 are constituted by a black cloth suede that prevents diffuse reflection of ambient light.

  As shown in FIG. 25, the upper winding drum 93 is provided with an intermediate drum 96A which is integrally rotated. Between the intermediate drum 96A and the upper spring drum 96B, leaf springs 98 as spring members are opposite to each other. It is wrapped around By the action of the spring force of the leaf spring 98, when the leaf spring 98 is drawn out from the intermediate drum 96A and wound around the upper spring drum 96B, the winding force by which the upper winding drum 93 winds the upper cloth suede 91 is wound. Occurs, and tension F1 is applied to the upper cloth suede 91. When the upper cloth suede 91 is rewound from the upper winding drum 93, the leaf spring 98 is unwound from the upper spring drum 96B and wound around the intermediate drum 96A.

  Further, the lower winding drum 94 is provided with an intermediate drum 97A which is integrally rotated, and a leaf spring 98 is wound around the intermediate drum 97A and the lower spring drum 97B in opposite directions. By the action of the spring force of the leaf spring 98, when the leaf spring 98 is drawn out from the intermediate drum 97A and wound around the lower spring drum 97B, the lower winding drum 94 winds up the lower cloth suede 92. Occurs, and tension F2 is applied to the lower cloth suede 92. When the lower cloth suede 92 is rewound from the lower winding drum 94, the leaf spring 98 is unwound from the lower spring drum 97B and wound around the intermediate drum 97A.

  When the viewing window 90 rotates together with the movable unit 34 via the mounting plate 95, the upper cloth suede 91 and the lower cloth suede 92 rotate without moving a driving source such as a motor. The upper winding drum 93 and the lower winding drum 94 are wound or unwound by the action of the driving force of the motor 51 and the spring force of the leaf spring 98, respectively. At this time, the upper cloth suede 91 and the lower cloth suede 92 act. Respective tensions F1 and F2 are substantially the same at any position of the movable unit 34. For this reason, even if the upper cloth suede 91 and the lower cloth suede 92 are present, the rotational movement of the movable unit 34 is not hindered. Note that reference numeral 99 in FIG. 25 denotes a mounting bracket.

  The apparatus control terminal 32 shown in FIG. 1 stores the measurement program software shown in FIG. 9 and activates the fixation target 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 and move the movable unit 34, and the light source motor 58 is driven and controlled to move the light sources 56A and 56B. The eyeball 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. The magnification correction program software of the measurement program software functions to correct and match the magnifications of images captured by the front imaging camera 62 and the side imaging camera 63 as described later.

  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 light source 56B is turned on as a far vision fixation target 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, with the light source 56A turned on as a fixation target for near vision, the near vision target distance NL and the eyeball rotation angle θ are arbitrarily changed, and the near vision state suitable for the subject 10 is confirmed. However, the near vision 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, lens) necessary for the production of spectacles stored in the customer database 71. Prescription data Y, spectacle frame data Z, spectacle wearing parameters V, etc.) are transmitted to a spectacle manufacturer's factory server (not shown) to order spectacle lenses or spectacles (S10).

[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, lens prescription data Y, and eyeglass 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 lens prescription data Y can be obtained by operating the button 73 (FIG. 10) if the device control terminal 32 of the spectacle wearing parameter measuring 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.

  Note that SPH of the lens prescription data Y shown in FIG. 10 is spherical power (unit: dpt), CYL is astigmatic power (unit: dpt), AXS is astigmatic axis (unit: °), and PX is prismatic power (unit: x). 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 used in the progressive power lens (for example, the distance between the distance point center and the near point center). 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 56B is turned on at the far vision state measurement position in FIG. The light source 56B serves as a fixation target for far vision. In this far vision state, for example, when it is desired to set the target distance of the fixation target for far vision, which is viewed by the subject 10 who is a spectacle wearer, to about 5 m, the light source 56B is reflected by the beam splitter 20 and the imaging lens 60 is reflected. Is adjusted so that an image (virtual image) of the light source 56 is formed in the vicinity of 5 m behind these 60 and 61 via the imaging lens 60 and the beam splitter 61. Specifically, the far vision target distance is set to 5 m in the above, but in order to set an arbitrary distance target distance value, the distance between the imaging lens 60 and the eye 11 of the subject 10 is set to e. When the focal distance of the imaging lens 60 is f and the distance distance target distance FL from the light source image 56D (virtual image) of the light source 56B imaged by the imaging lens 60 to the eye 11 is g, The distance h from the imaging lens 60 is set by the following equation (1).
h = (eg) f / (eggf) (1)
However, when the target distance g is infinity, h = f.

  The subject 10 observes the light source image 56D (virtual image) of the light source 56B as a fixation target for distance vision, and the examiner shows that the subject's line of sight is horizontal and the face is not tilted. 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 that the line of sight of the subject 10 and the eyes are within the upper and lower reference lines, the photographing button 76 displayed on the monitor of the device control terminal 32 is operated, and the front imaging camera 62 is operated. The front face image of the subject 10 in the far vision state is imaged at. 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 of FIG. 6B, the light source 56A of the movable unit 34 forms an image while rotating along the rack rail 39 of the track frame 36 around the rotation point 12 of the eye 11 to be examined. In this embodiment, an aerial image (real image) is formed 30 to 50 cm ahead of the subject 10 by moving linearly on the optical axis of the lens 60, and this image of the light source 56A is fixed as a fixation target for near vision. As shown in FIG.

In order to set the near vision target distance NL to a value of 0 to 50 cm as described above, the distance between the imaging lens 60 and the eye 11 of the subject 10 is set to e, and the focal length of the imaging lens 60 is set. The distance h between the light source 56A and the imaging lens 60 is defined as f, where g is the near vision target distance NL from the light source image 56C (real image) of the light source 56A imaged by the imaging lens 60 to the eye 11 to be examined. Is set by the following equation (1).
h = (eg) f / (eggf) (1)

  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 56A is moved to the movable unit 34 so that an aerial image that is a light source image 56C (real image) of the light source 56A is formed as a fixation target for near vision at the eyeball rotation angle θ and the near vision target distance NL. , And automatic control for linearly moving the light source 56A on the optical axis of the imaging lens 60 based on the above formula (1). While confirming that the subject 10 is observing the fixation target for near vision on the imaging screen (near vision) shown in FIG. 14, the eyes of the subject 10 are the upper and lower sides in FIG. 14. After confirming that it is within the reference line, the photographing button 77 displayed on the monitor of the device control terminal 32 is operated, and the near vision state of the subject 10 is detected by the front imaging camera 62. A front face image is taken. 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 56A is rotated by the movable unit 34 to a position that matches the input numerical value, and the light source 56A is moved to the imaging lens 60. Move linearly on the optical axis. 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 operation 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 56A is rotated by the movable unit 34 to change the eye rotation angle θ (near vision angle), so that the eye rotation angle optimum for the spectacle wearer is obtained. Find θ. Thereafter, the eyeball rotation angle θ is held, the light source 56A is linearly moved on the optical axis of the imaging 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)]
The measurement menu screen on the monitor of the device control terminal 32 (FIG. 12) is used to measure and calculate various spectacle wearing parameters required for manufacturing spectacles using the images thus obtained. Then, the interpupillary distance measurement button 80 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 80 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, for example, the pupil centers of the left eye 82 and the right eye 83 are obtained by the following measurement method, and the distance between the pupil centers is set as the distance vision inter-pupil distance FPD.

  As a first measurement method, the pupil centers of the left eye 82 and the right eye 83 are directly designated by a pointing device such as a mouse, and the device control terminal 32 measures the distance on the screen. As a second measurement method, a pupil center is automatically obtained by image processing. In this second measurement method, the pupil vicinity region 89 is dragged with the mouse as shown by the solid line in FIG. 16A in order to shorten the image processing time. 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. Therefore, the portion where the amount of reflected light is reduced is detected as a pupil region to obtain the pupil center, and the distance between these pupil centers is converted to obtain the distance vision inter-pupil distance FPD.

  In the present embodiment, the pupil center may be obtained using either the first measurement method or the second measurement 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. The distance between the far vision pupils may be obtained as the left eye FPD and the right eye FPD, respectively.

  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. For this reason, the distance between near vision pupils measured in the same manner as the distance vision pupil distance FPD is a distance on the eye 11 to be examined. Referring to FIG. 17, when manufacturing 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 the obtained front image 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 far vision pupils of the front image. 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 measurement menu of the device control terminal 32 (FIG. 12). 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 spectacle frame wearing angle α 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. The actual distance vision spectacle wearing distance A is influenced by the three-dimensional shape of the spectacles such as the frame tilt angle β and the lens curve, so the spectacle wearing distance measurement program reads and calculates the trace data and the lens curve of the spectacle frame 14. Then, a distance vision spectacle wearing distance A is calculated in consideration of the calculated value and the disguise distance.

  The near vision glasses wearing distance B can also be obtained by a similar operation. That is, since the eyeball rotation angle θ is already known, the apex of the cornea of the eye 11 to be examined is designated by a pointing device such as a mouse, and the optical axis corresponding to the eyeball rotation angle θ, that is, the near vision axis 18 is drawn. The distance between the apex of the cornea on the optical axis and the rim 15 of the spectacle frame 14 is measured and used as a disguise 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.

  Next, a method for detecting blinking and reducing shooting failures will be described. The blink is said to be around 0.1 seconds and is performed irregularly. Although it is possible to encourage the eyeglass wearer not to blink, it is difficult to prevent because it is inherently unconscious.

  Therefore, first, the subject 10 who is a spectacle wearer observes the image of the light source 56B, and the examiner checks on the monitor or the like whether or not the line of sight of the subject 10 (far vision axis 17) is oriented horizontally. (See FIG. 13). If the line of sight is not horizontally oriented, the height of the base 37 or the chair on which the subject 10 is sitting is adjusted so as to be horizontal. Next, it is confirmed whether or not the eye of the subject 10 is within the upper and lower reference lines of the photographing screen (FIG. 13) on the monitor of the device control terminal 32. . Then, the apparatus control terminal 32 performs the image processing as shown in FIG. 16B in real time to determine the pupil position in the regions within both reference lines, finds the pupil at the same time, and at the same time, within the pupil Changes in the amount of reflected light are detected. Since the amount of reflected light is larger for the eyelid than for the cornea, the amount of reflected light increases greatly when blinking, and blinking can be detected. When the imaging button 76 on the imaging screen (FIG. 13) displayed on the monitor to capture the face image of the subject 10 is operated, the device control terminal 32 displays “replay” on the screen when blinking is detected. When the “shooting” display is displayed and no blink is detected, face images are taken by the imaging cameras 62 and 63, and the taken images are recorded.

  The device control terminal 32 displays a “re-photographing” display on the screen when a blink is detected, or automatically detects and captures when there is no blink without displaying this display. You may do it. As described above, the apparatus control terminal 32 detects blinks and reduces shooting failures, whereby the measurement time by the spectacle wearing parameter measurement apparatus 30 can be shortened. The apparatus control terminal 32 also detects blinking in the same manner as described above when photographing a near vision face image of the subject 10.

[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 of stored screens shown in FIG. 32 and the customer database 71. At this time, the captured image is also saved. On this storage screen, the progressive zone length L of the spectacle lens for seniors such as a progressive power lens is determined and displayed using the above spectacle wearing parameters for far vision and near vision.

  That is, the device control terminal 32 has already measured and calculated the distance vision spectacle wearing distance A, the near vision spectacle wearing distance B, the spectacle frame wearing angle α, and the eyeball rotation angle θ shown in FIG. The progressive zone length L is calculated by setting the distance VR from 11 corneal apexes 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.

[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 a factory server of a spectacle manufacturer (not shown) by the spectacle store terminal 70. It is sent and a spectacle lens or spectacles is ordered. As a result, the spectacle manufacturer performs the optical design of the spectacle lens optimal for the spectacle wearer using at least one of the spectacle wear parameters of the individual spectacle wearer, and the spectacle lens based on the design value. And the spectacle lens is incorporated to manufacture the optimal spectacles for the spectacle wearer.

  For glasses lenses for seniors such as progressive-power lenses, far vision and near vision glasses wear parameters are required, but in the case of near-only single focus lenses, far vision glasses wear parameters Is unnecessary, and shooting in a far vision state can be omitted. 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. .

With the configuration as described above, the following effects (1) to (16) are achieved according to the above embodiment.
(1) Eyes 11 to be examined of a subject 10 who is a spectacle wearer in which the light sources 56A and 56B are linearly moved with respect to the imaging lens 60 and the light sources 56A and 56B are positioned by the positioning unit 35 by the movable unit 34. The subject 10 is set to the far vision state or the near vision state by rotating around the rotation point 12 at the center, and the subject 10 set to the far vision state or the near vision state is used for the front. The image is captured by the imaging camera 62 and the side imaging camera 63, the image is recorded, and the apparatus control terminal 32 measures and calculates the spectacle wearing parameters based on the obtained captured image. Visual spectacle wearing parameters can be measured with high accuracy with a simple structure. As a result, it is possible to optically design a dedicated spectacle lens that is optimal for each individual of the subject 10 who is the spectacle wearer, using at least one of these spectacle wear parameters measured with high accuracy. Thus, it is possible to manufacture the most suitable glasses for the spectacle wearer.

  (2) The light sources 56 </ b> A and 56 </ b> B are installed on the light source support portion 57, and the light source support portion 57 is screwed to the drive screw 55 extending in the optical axis direction of the imaging lens 60. Since the light sources 56A and 56B are linearly moved with respect to the imaging lens 60 by being driven, the position of the light sources 56A and 56B with respect to the imaging lens 60 is adjusted. The distance NL can be arbitrarily changed and set.

  (3) The movable unit 34 is provided with a rotation motor 51 and drive gears 47 and 48, and these drive gears 47 and 48 center around the rotation point 12 of the eye 11 of the subject 10 who is a spectacle wearer. The drive gears 47 and 48 are driven by the rotation motor 51 so that the light sources 56A and 56B installed in the movable unit 34 are covered with the above-mentioned covered gears. Since it is configured to rotate around the rotation point 12 of the optometry 11, the eyeball rotation angle θ can be arbitrarily changed and set by the rotation of the light sources 56A and 56B.

  (4) Since the rotation motor 51 of the movable unit 34 is a pulse motor, and the driving force of this pulse motor is transmitted to the drive gears 47 and 48 via the worm 52 and the worm wheel 53, the pulse motor (rotation) Even when no power is supplied to the motor 51), unnecessary rotation of the drive gears 47 and 48 can be prevented by the action of the worm 52 and the worm wheel 53. As a result, even when the power is not turned on, the movement of the movable unit 34 due to gravity can be prevented, and the stationary state of the movable unit 34 can be held, for example, in the far vision state position.

  (5) The front imaging camera 62 is installed in the movable unit 34, and the optical axis of the front imaging camera 62 is far vision in the eye 11 of the subject 10 who is a spectacle wearer positioned by the positioning unit 35. The front imaging camera 62 is rotated around the rotation point 12 in the eye 11 of the subject 10 while keeping the axis 17 or the near vision axis 18 at all times, and the subject 10 is moved far away. Since the viewing state and the near vision state are set, the front imaging camera 62 can appropriately photograph the subject 10 in the near vision state as well as the far vision state. Wear parameters can be measured with high accuracy.

  (6) Since the light source 56B as the fixation target for distance vision and the light source 56A as the fixation target for near vision are independently provided in the movable unit 34, the pin for the light source 56B that forms a virtual image The hole (formed on the attachment surface 22 of the light source support 57) is set to a size smaller than the pinhole for the light source 56A (formed on the attachment surface 21 of the light source support 57), and the distance fixation target and near It is possible to visually recognize the fixation target for viewing with substantially the same size.

  (7) A viewing window 90 for allowing the subject 10 who is a spectacle wearer positioned by the positioning unit 35 to visually recognize the light sources 56A and 56B is rotated together with the light sources 56A and 56B by the movable unit 34. Since the upper cloth suede 91 and the lower cloth suede 92 that shield the disturbance light are attached to the mounting plate 95 including the observation window part 90 in the rotational movement up and down direction, the subject 10 can see the observation window part 90. When the light source 56A or 56B is viewed through the upper cloth suede 91 and the lower cloth suede 92, the disturbance light is blocked, and the disturbance light can prevent the inside of the measuring apparatus main body 31 from being visually observed. As a result, it is possible to suppress the induced stimulation due to the disturbance light, and to make the subject 10 stare at the light source 56A (the near vision fixation target) or the light source 56B (the distance vision fixation target) well.

  (8) The upper cloth suede 91 and the lower cloth suede 92 attached to both sides of the rotational movement direction of the movable unit 34 are wound around the upper winding drum 93 and the lower winding drum 94, respectively, and these upper winding drum 93 and lower winding drum 94 94 are provided with intermediate drums 96A and 97A so as to rotate integrally, respectively, between the intermediate drum 96A and the upper spring drum 96B, and between the intermediate drum 97A and the lower spring drum 97B in opposite directions. The upper winding drum 93 is configured to wind up or unwind the upper fabric suede 91 and the lower winding drum 94 is wound up or rewound by the action of the spring force of the wound leaf spring 98. For this reason, the tensions F1 and F2 applied to both the upper cloth suede 91 and the lower cloth suede 92 by the action of the spring force are constant regardless of the moving position of the movable unit 34. The presence of the suede 92 does not prevent the movable unit 34 from rotating. In addition, a driving source such as a motor is not required for winding or unwinding the upper cloth suede 91 and the lower cloth suede 92.

  (9) Since the upper cloth suede 91 and the lower cloth suede 92 are composed of black cloth suede, the upper cloth suede 91 and the lower cloth suede 92 can prevent disturbance reflection of disturbance light. The gaze of the light source 56A (the near vision fixation target) or the light source 56B (the distance vision fixation target) by a certain subject 10 can be further improved.

  (10) 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 depending on the type of the spectacle lens worn by the spectacle wearer. The measurement by the spectacle wearing parameter measurement device 30 can be speeded up by omitting the parameter measurement.

  (11) When the eyeball rotation angle θ and the near vision target distance NL of the spectacle wearing parameters are unknown, the light sources 56A and 56B are checked while confirming the near vision state suitable for the subject 10 who is the spectacle wearer. The movable unit 34 including the imaging lens 60 is rotated along the rack rail 39 of the track frame 36, and the light sources 56A and 56B are moved closer to or away from the imaging lens 60. Since the near vision target distance NL is determined, the eyeball rotation angle θ and the near vision target distance NL optimum for the spectacle wearer can be measured with high accuracy.

  (12) Since the distance spectacle wearing distance A and the near vision spectacle wearing distance B are calculated in consideration of a solid shape such as the frame tilt angle β of the spectacle frame 14, each of the measured binocular wearing distances Is corrected with the above three-dimensional shape, the distance spectacle wearing distance A and the near vision spectacle wearing distance B can be measured with high accuracy.

  (13) The near vision interpupillary distance NPD is calculated on the surface of the spectacle lens 13 of the spectacles worn by the subject 10 who is a spectacle wearer, and thus the near vision necessary for manufacturing the spectacles. The interpupillary distance NPD can be measured as an optimum value.

  (14) Since the far vision fixation target set by the light source 56B in the movable unit 34 is formed as a virtual image, the spectacle wearing parameter measurement device 30 is compared with the case where the far vision fixation target is formed as a real image. Can be downsized.

  (15) Since the device control terminal 32 detects the blink of the subject 10 who is a spectacle wearer, and captures the subject 10 when no blink occurs, the facial image of the subject 10 is captured. Shooting failures can be reduced, and the spectacle wearing parameter measurement time by the spectacle wearing parameter measuring device 30 can be shortened.

  (16) Since spectacle lenses and spectacles are manufactured using spectacle wearing parameters measured with high accuracy by the spectacle wearing parameter measuring device, this spectacle lens is most suitable for individual spectacle wearers whose spectacle wearing parameters have been measured. The dedicated spectacle lens can be used, and the spectacles can also be the most suitable dedicated spectacles for the individual of the spectacle wearer whose spectacle wearing parameters are measured.

  As mentioned above, although this invention was demonstrated based on the said embodiment, this invention is not limited to this. For example, in the present invention, a light source such as an LED is used and this light source image is used as a fixation lamp. However, an image such as a character or a symbol may be used.

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. 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. It is. It is a front view which shows roughly the arrangement | positioning condition of the imaging camera for sides of FIG. 3, and a mirror. It is a VIII arrow line view in FIG. It is a block diagram which shows the measurement program 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 a measurement 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 an explanatory diagram for explaining the distance between the far vision pupils, and (B) is an explanatory diagram for explaining the distance between the near vision pupils. 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 XXV arrow line view in FIG. It is the figure which showed the positional relationship of the light source which is a fixation target in (a) is a distance vision state, and (b) is a near vision state, and its light source image.

Explanation of symbols

10 Examinee (glass wearer)
12 Rotation point 13 Eyeglass lens 14 Eyeglass frame 17 Distant visual axis 18 Near visual axis 30 Eyeglass wearing parameter measuring device 31 Measuring device main body 32 Device control terminal (measurement calculation means)
34 Movable unit (fixation means)
36 Track frame 39 Rack rail 47, 48 Drive gear 51 Rotating motor 52 Worm 53 Worm wheel 55 Drive screw 56A, 56B Light source (fixation means, fixation target)
56C, 56D Light source image 57 Light source support 58 Light source motor 60 Imaging lens (fixation means, optical member)
62 Front imaging camera (imaging input means)
63 Side imaging camera (image input means)
90 Viewing window (opening)
91 Cloth suede (shading material)
92 Under cloth suede (shading material)
93 Upper winding drum 94 Lower winding drum 96B Upper spring drum 97B Lower spring drum 98 Leaf spring (spring member)
θ Eye 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 with near vision glasses wearing distance NL Near vision target distance

Claims (6)

In a spectacle wearing parameter measuring apparatus for measuring spectacle wearing parameters necessary for producing spectacles suitable for a spectacle wearer,
A fixation target, and an optical member and an opening for allowing a spectacle wearer to visually recognize the fixation target, linearly move the fixation target with respect to the optical member, and the fixation target is a spectacle wearer. A fixation means for rotating the eyeglass wearer together with the fixation target while setting the spectacle wearer in a distance vision state or a near vision state by rotating around the eyeball rotation point of
An image input unit that captures an image of a spectacle wearer set in a far vision state or a near vision state by the fixation unit and captures the image; and
Measurement calculation means for measuring and calculating the spectacle wearing parameters based on the captured image obtained by the image input means,
A spectacles wearing parameter measuring device, wherein the opening is provided with shielding members for shielding ambient light on both sides in the moving direction. The fixation means has a movable unit including a motor and a drive gear, and the drive gear is installed on the arc surface of the orbit frame having an arc surface centered on the eyeball rotation point of the spectacle wearer. By meshing with the rack rail and driving the drive gear by the motor, the fixation target and the opening installed in the movable unit rotate together with the movable unit around the eyeball rotation point,
2. The spectacle wearing parameter measurement device according to claim 1, wherein shielding members for shielding ambient light are attached to both sides of the movable unit in the moving direction.   Each of the shielding members attached to both sides in the moving direction of the movable unit is wound around the winding drum, and this winding drum is caused by the action of the spring force of the spring member wound in the reverse direction with the spring drum. The spectacles wearing parameter measuring device according to claim 2, wherein the shielding member is wound up or rewound.   The spectacles wearing parameter measuring device according to any one of claims 1 to 3, wherein the shielding member is made of black cloth suede. The optical member has an imaging lens, and the distance h to the imaging lens of the fixation target in the fixation means is e, the distance between the imaging lens and the eye of the spectacle wearer, and the target distance 5. The spectacle wearing parameter measurement device according to claim 1, wherein g is set by the following equation, where g is a focal length of the imaging lens, and f is a focal length of the imaging lens.
h = (eg) f / (eggf)   6. The fixation target for the far vision and the fixation target for the near vision are provided independently as the fixation target in the fixation means, according to any one of claims 1 to 5. Eyeglass wearing parameter measuring device.

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