JP2015068983A - Spectacle wearing parameter measurement instrument and program for spectacles wearing parameter measurement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow suitable display of an image of a subject.SOLUTION: A spectacle wearing parameter measurement instrument includes a front imaging optical system which captures a front image of a subject wearing a spectacle frame and can vary an imaging distance from the subject, and a lateral imaging optical system for capturing a lateral image of the subject wearing the spectacle frame and measures a spectacle wearing parameter on the basis of the front image and the lateral image. The spectacle wearing parameter measurement instrument further includes display control means for displaying, on a display unit, the front image captured by the front imaging optical system and the lateral image captured by the lateral imaging optical system and magnification correction means for correcting the magnification of at least either one of the front image and the lateral image in accordance with variation of the imaging distance so that the front image and the lateral image displayed on the display unit are equally reduced independently of the variation of the imaging distance.

Description

  The present invention relates to a spectacle wearing parameter measuring apparatus for measuring spectacle wearing parameters required for manufacturing spectacles, and a spectacle wearing parameter measuring program.

  When producing spectacles, it is necessary to design the spectacle lens or to process and frame the spectacle lens so that the spectacles conform to the prescription value obtained by the inspection.

  Therefore, a spectacle wearing parameter measurement device has been proposed in which a face of a subject wearing a spectacle frame is photographed by an imaging device, and an eye position (eye position) with respect to the spectacle frame is calculated from the photographed image (patent) Reference 1).

JP 2007-216049 A

  In the conventional apparatus, an image of a subject photographed under different photographing conditions is analyzed, and various spectacle wearing parameters are measured. Moreover, the photographed image and the analysis result are displayed on the display unit, and the measurement result is shown to the examiner.

  However, when images with different shooting conditions are displayed on the display unit, the display uniformity may be disturbed, and the display may be difficult to see.

  In view of the above problems, an object of the present invention is to provide a spectacle wearing parameter measurement device and a spectacle wearing parameter measurement program that can suitably display an image of a subject.

  (1) A front imaging optical system that captures a front image of the subject wearing a spectacle frame and capable of changing an imaging distance with respect to the subject, and a test wearing the spectacle frame A side imaging optical system that captures a side image of a person, and a spectacle wearing parameter measuring device for measuring spectacle wearing parameters based on the front image and the side image, the front imaging optical Display control means for displaying the front image captured by the system and the side image captured by the side imaging optical system on a display unit, and the front image and the side displayed on the display unit A magnification correction that corrects at least one of the magnification of the front image and the side image according to the change in the imaging distance so that the scale between the two images becomes equal regardless of the change in the imaging distance Characterized in that it comprises a stage, a.

  (2) A front imaging optical system that captures a front image of the subject wearing a spectacle frame and capable of changing an imaging distance to the subject, and a test wearing the spectacle frame A side imaging optical system that captures a side image of the person, and the spectacle wearing parameter measurement executed in the spectacle wearing parameter measuring device for measuring the spectacle wearing parameter based on the front image and the side image A front image captured by the front imaging optical system and the side image captured by the side imaging optical system by being executed by a processor of the spectacle wearing parameter measurement device. , And a scale between the front image and the side image displayed on the display unit is a change in the imaging distance. The spectacle wearing parameter measurement device is configured to execute a magnification correction step of correcting at least one of the magnification of the front image and the side image in accordance with the change in the imaging distance so that they are equal regardless. And

It is a schematic block diagram for demonstrating the external appearance of this embodiment. It is a schematic block diagram for demonstrating the optical system of this embodiment. It is a schematic block diagram of the side imaging optical system of this embodiment. It is a block diagram which shows the control system of this embodiment. It is a figure which shows an example of the screen displayed on a display part. It is a figure for demonstrating the operation method using the screen displayed on a display part. It is a figure which shows an example of the screen displayed on a display part.

  Hereinafter, the present embodiment will be described with reference to the drawings. In the following description, the left-right direction of the subject will be described as the X-axis direction, the up-down direction of the subject as the Y-axis direction, and the front-back direction of the subject will be described as the Z-axis direction. FIG. 1 is a diagram for explaining the configuration of a spectacle wearing parameter measuring apparatus 1 according to this embodiment. FIG. 2 is a cross-sectional view of the spectacle wearing parameter measurement device 1 of the present embodiment at the time of distance measurement when cut along the YZ plane.

<Overview>
The apparatus 1 mainly includes a front imaging optical system (for example, the imaging optical system 200b and the imaging optical system 300b), a side imaging optical system 500, and a display control unit (for example, the control unit 70) (FIG. 1). For example, the front imaging optical system may capture a front image 620 of the subject wearing the spectacle frame F. The front imaging optical system may be capable of changing the imaging distance with respect to the subject, for example. The side imaging optical system 500 may, for example, capture a side image (for example, a left side image 621 and a right side image 622) of the subject wearing the spectacle frame F (see FIG. 5). In addition, this apparatus may be used in a state where the subject does not wear the spectacle frame. For example, it may be used to monitor changes in pupil position in far vision and near vision. For example, the apparatus 1 may measure the spectacle wearing parameters based on the front image 620 and the side image.

  The display control unit may display the front image 620 captured by the front imaging optical system and the side image captured by the side imaging optical system 500 on the display unit 15. The front image 620 and the side image displayed on the display unit 15 may be raw images or images subjected to image processing (for example, noise removal processing). The display control means may display the front image and the side image simultaneously in parallel. Further, the control unit may display the front image and the side image at different timings.

<Magnification correction means>
In addition, this apparatus 1 is provided with a magnification correction means (for example, control part 70) (refer FIG. 1). The magnification correction unit is configured to display at least one magnification of the front image 620 and the side image so that the scale between the front image 620 and the side image displayed on the display unit 15 is equal regardless of the change in the imaging distance. May be corrected according to the change in the imaging distance (see FIG. 5).

  Note that the magnification correction means has a reduced scale between the side image and the front image 620 displayed after the imaging distance is changed even when the imaging distance of the front imaging optical system with respect to the subject is changed. The magnification of the front image captured by the front imaging optical system after the imaging distance is changed may be corrected so as to be equal, and the magnification of the side image may be maintained. When the front image and the side image are displayed at the same scale, it is not always necessary to have the same scale, as long as the examiner can consider the same scale.

  Note that the imaging optical system may be capable of capturing at least two front images having different imaging distances. For example, when the imaging distance of the front imaging optical system with respect to the subject is changed, the magnification correction unit is configured to change the first front image (the front image 620 displayed in advance) and the second front image (the imaging distance is The magnification of the front image 620 captured by the front imaging optical system after the imaging distance has been changed may be corrected so that the scale is equal to the scale of the front image 620 displayed after the change.

  When the front image 620 and the side image are displayed, the display control unit may display the side image acquired in advance before the change of the imaging distance, or the side image acquired after the change of the imaging distance. An image may be displayed. When the front image 620 and the side image are displayed, the control unit may be a still image at least one of the front image and the side image. Moreover, when displaying a front image and a side image, a control part may be a moving image at least any one of a front image and a side image.

  Note that, for example, when the imaging distance of the front imaging optical system with respect to the subject is changed, the magnification correction unit has the same scale of the side image and the front image displayed after the imaging distance is changed. As described above, the magnification of the front image captured by the front imaging optical system after the imaging distance is changed may be corrected. When correcting the magnification of the image, the shooting magnification of the image may be corrected, or the display magnification of the image may be corrected.

<Fixed target presentation optical system>
The apparatus 1 may further include a fixation target presenting optical system (for example, fixation target projection optical systems 200a and 300a) (see FIG. 2). The fixation target presenting optical system includes a fixation target (for example, the light sources 220 and 320) for fixing the subject, and can change the distance at which the fixation target is presented to the subject.

  The front imaging optical system may be capable of changing the imaging distance according to the change of the presentation distance. In addition, the front imaging optical system may capture the front image 620 via, for example, a diaphragm (for example, diaphragms 214 and 314).

  The fixation target presenting optical system may share a part of the optical path with the front imaging optical system. The fixation target presentation optical system may switch the optical presentation distance of the fixation target with respect to the eye to be examined between a distant place and a near place, or may change the presentation distance in the near place. In this case, since the optical presentation distance of the fixation target with respect to the eye to be examined and the imaging distance of the imaging optical system with respect to the eye to be examined are in a pair relationship, the magnification correction means determines the imaging distance of the imaging optical system to the eye to be examined. As the corresponding magnification correction, the magnification correction corresponding to the optical presentation distance of the fixation target with respect to the eye to be examined may be performed.

<Distance variable unit>
The front imaging optical system may include a distance variable unit (for example, the optical system moving unit 350). When the presentation distance is changed, the distance variable unit is configured so that the optical presentation distance of the fixation target with respect to the eye to be examined is equal to the optical distance of the diaphragm with respect to the eye to be examined. The distance may be changed. Since the optical presentation distance of the fixation target with respect to the eye to be examined and the optical distance of the stop with respect to the eye to be examined are adjusted to be the same, for example, correction calculation when obtaining the position through which the line of sight on the spectacle lens passes is performed. There is no need for it.

  The optical presentation distance of the fixation target relative to the eye to be examined is adjusted by moving at least a part of the optical members of the fixation target presentation optical system. The optical distance of the stop with respect to the eye to be examined is adjusted by moving at least a part of the optical members of the imaging optical system.

  The front imaging optical system may be capable of changing an imaging distance (for example, an optical distance from the eye to the imaging device) with respect to the subject, for example. Furthermore, the front imaging optical system may change the imaging distance for the subject according to the change in the optical presentation distance of the fixation target with respect to the eye to be examined.

<About display layout>
The display control means may simultaneously display the front image 620, the right side image 622, and the left side image 621 on the display unit 15 (see FIG. 5). One or a plurality of display units 15 may be provided.

  The display control means may display the left side image 621 on the right side of the front image 620 and the right side image 622 of the subject on the left side of the front image 620 on the same screen of the display unit 15. .

  Further, for example, the display control unit may arrange the display area of the left side image 621 and the display area of the right side image 622 symmetrically with respect to the center position in the display area of the front image 620.

<Inversion processing means>
The apparatus 1 may include an inversion processing unit. The inversion processing means, for example, inverts the right side image 622 and the left side image 621 captured by the side imaging optical system 500 that captures images via mirrors (for example, mirrors 530L and 530) to the display unit 15 respectively. It may be displayed.

  As the inversion processing means, for example, an imaging element that inverts and outputs the imaging signal may be used, or may be inverted by image processing in the display control means.

<Correspondence display>
In addition, this apparatus 1 may be provided with a positional information detection means (for example, control part 70) (refer FIG.1, 4). The position information detection means may detect position information for defining a position related to the eye or glasses of the subject based on one of the front image 620 and the side image (also referred to as a first image). (See FIG. 5). The spectacles include, for example, spectacle frames and lenses. The front image 620 and the side image include, for example, a spectacle frame F and an eye to be examined.

  In this case, on the basis of the position information detected by the position information detecting means, the display control means performs a position relative to the display area of the other image (also referred to as the second image) of the front image 620 and the side images 621 and 622. Corresponding display corresponding to information (for example, horizontal line Ih1 and horizontal line Ih3, frame lower end line Fh1 and frame lower end line Fh3, etc.) may be performed.

  For example, the position information detection unit may detect position information for defining a position related to the eye or glasses of the subject based on the front image 620. And a display control means may perform the corresponding | compatible display corresponding to position information with respect to the display area of a side image based on the detected position information. Of course, the reverse case is also possible.

  If the corresponding display displayed for the display area of the other image is the first corresponding display, the display control means corresponds to the position information for the display area of one image of the front image 620 and the side image. The second correspondence display may be performed. For example, the display control means may perform a corresponding display on both corresponding images.

  The apparatus 1 may include an instruction receiving unit. The instruction receiving means receives an instruction from the examiner. The position detecting means may detect the position information based on an instruction signal from the instruction receiving means.

  The position information detection means may detect position information for defining the position of the subject's eye or glasses by image processing on one of the front image 620 and the side image, for example. Further, the position information detection means may detect position information related to the eye or glasses of the subject by receiving an instruction signal from the examiner for at least one of the front image 620 and the side image, for example. Note that the position information detecting means may be used in combination. Alternatively, the position detection result by image processing may be adjusted based on an instruction signal from the examiner.

  When detecting position information, the position information detecting means may detect the position information based on both images including one image. For example, the average position in both images may be detected, and the result may be displayed superimposed on the other image.

  As a display method of position information for the display area of the other image, for example, marking display at a corresponding position of the other image may be used. In addition, the corresponding position of the other image and the other position may be displayed in different display forms (for example, different colors, different gradations, etc.).

  Further, the position information may be displayed on the display area of the other image. Further, position information may be displayed in the vicinity of the display area of the other image, and a movable line on the other image may be electronically displayed to match the position information.

  The display control means displays the first index (for example, the horizontal line Ih1, the frame lower end line Fh1, etc.) in the front image 620, and the second corresponding to the height of the first index in the side image. (For example, horizontal line Ih3, frame lower end line Fh3, etc.) may be displayed. In this case, the position information detecting means may detect the position information based on an instruction signal from an instruction receiving means for moving one of the first index and the second index.

  Further, at this time, the display control means moves the other of the first index and the second index in synchronization based on the detection result of the position information, so that the front image 620 and the other image of the side images are moved. The display position of the corresponding display for the display area may be changed. As the index, a point, a line, a region, or the like may be used.

  As the synchronous display, for example, display control may be performed in which the other index is moved in conjunction with the movement of one index. As the synchronous display, for example, display control may be performed such that when one point on one image is clicked, the index of the other image is moved.

  The apparatus 1 is for defining the position of the subject's eye or glasses in the other image based on the instruction signal from the instruction receiving means for the display area of the other image on which the position information is displayed. You may provide the 2nd position information detection means to detect position information.

<Embodiment>
FIG. 1 is a schematic configuration diagram of an external appearance of an image analysis apparatus 1 for eyeglass matching according to the present embodiment. FIG. 2 is a schematic configuration diagram of an optical system housed in the spectacle matching image analysis apparatus 1 according to the present embodiment. Hereinafter, with reference to FIG. 1 and FIG. 2, the configuration of the image analysis apparatus 1 for eyeglass matching according to this embodiment will be described. As shown in FIG. 1, the apparatus main body 3 of the image analysis apparatus for eyeglass matching includes various measurement optical systems, drive systems, control systems, and the like, which will be described later. A presentation window 5 is provided on the subject side of the apparatus body 3. The presentation window 6 is a window through which a fixation light beam passes when presenting a fixation target to a subject. Similarly, a face support unit 5 is provided on the subject side of the apparatus body 3. The face support unit 5 is a unit for supporting the subject's face. An operation unit (operation unit) 10 is provided on the examiner side of the apparatus main body 3.

<Operation unit>
The operation unit 10 outputs a signal corresponding to the input operation instruction to the control unit 70 described later. The operation unit 10 in this embodiment uses a touch panel type display unit 15. That is, in the present embodiment, the operation unit and the display unit are combined. Of course, the operation unit and the display unit may be provided separately. For example, the operation unit 10 includes a configuration using at least one of operation means such as a mouse, a joystick, and a keyboard. For example, the display unit 15 may be a display mounted on the main body of the spectacle wearing parameter measurement device 1 or a display connected to the main body. Of course, it may not be a touch panel type. For example, a display of a personal computer (hereinafter referred to as “PC”) may be used. For example, a plurality of displays may be used in combination. The display unit 15 may display various images including a captured front image or a side image in a far vision and near vision state, and an analysis result.

<Face support unit>
The face support unit 5 supports the subject's forehead. The face support unit 5 keeps the distance between the measurement optical system (for example, the distance measurement optical system 200, the near measurement optical system 300, the reflection mirror 410, etc.) and the subject to be described later. Further, the face support unit 5 can rotate in the left-right direction of the subject, and can adjust the orientation of the subject's face. Accordingly, when the orientation of the subject's face is shifted to either the left or right direction, the face support unit 30 can be rotated so that the subject's face faces the front.

  The face support unit 5 mainly includes a joint portion 31, a working distance adjustment unit 40, and a left / right rotation adjustment unit 50. The abutting portion 31 is a portion that contacts the subject's face. The working distance adjustment unit 40 adjusts the position of the contact portion 31 in the Z-axis direction in order to adjust the distance between the subject and a measurement optical system described later. For example, in this embodiment, when the adjustment knob 41 of the working distance adjusting unit 40 is operated by the examiner, the position of the contact portion 31 in the Z-axis direction (working distance direction) is adjusted. The horizontal rotation adjusting unit 50 adjusts the angle in the left-right direction of the contact portion 31 so that the face of the subject faces the front. For example, in the present embodiment, when the examiner operates the adjustment knob 51 of the left-right rotation adjustment unit 50, the left-right angle of the contact portion 31 is adjusted.

  The face support unit 5 is not limited to the configuration of this embodiment. In the present embodiment, it has been described that the subject's forehead is supported, but it may be the subject's chin, cheek, nose, or the like. Any configuration that supports the face of the subject may be used. In the present embodiment, the face support unit 5 has a configuration in which the position of the contact portion 31 is adjusted by the examiner operating the adjustment knobs 41 and 51, but is not limited thereto. The face support unit 5 may include a drive unit such as a motor, and the position of the contact unit 31 may be adjusted electrically by operation of the operation unit 10 or the like.

<Optical system>
Next, with reference to FIG. 2, an optical system housed in the image analysis apparatus 1 for eyeglass matching according to the present embodiment will be described. The spectacle matching image analysis apparatus 1 of the present embodiment mainly includes an illumination optical system 110, a distance measurement optical system 200, a near measurement optical system 300, an optical path switching unit 400, and a side imaging optical system 500.

  In the present embodiment, the distance measurement optical system 200, the near measurement optical system 300, and the front image of the subject are used. The side imaging optical system 500 is used for taking a side image of the subject.

<Illumination optics>
The illumination optical system 110 mainly includes four light sources 110R, 110L, 111R, and 111L (110L and 111L are omitted in FIG. 2). The illumination optical system 110 illuminates the face of the subject from four directions by the light sources 110R, 110L, 111R, and 111L. Of course, the illumination optical system 110 is not limited to the above configuration. Any number of light sources may be used, and the arrangement may be arbitrary. The illumination optical system 110 only needs to illuminate the subject's face with a light source. For example, the illumination optical system 110 may be provided below the face support unit 5 and above the presentation window 6.

  In the illumination optical system 110 of this embodiment, an infrared light source is used. By using an infrared light source and an infrared filter, which will be described later, the influence of disturbance light (natural light or the like) can be suppressed. However, it may not be an infrared light source, and a visible light source may be used.

<Distant measurement optical system>
A distance measurement optical system (hereinafter also referred to as a first measurement optical system) 200 will be described with reference to FIG. The distance measurement optical system 200 is an optical system for measuring the eye position of the eye E in the distance vision state with respect to the spectacle frame. The distance measurement optical system 200 is divided into a first fixation target projection optical system 200a and a first imaging optical system 200b. The measurement optical axis of the distance measurement optical system 200 is an optical axis L1.

  The fixation target projection optical system 200a projects a distance fixation target for fixing the subject to a distance vision state on the eye E. The fixation target projection optical system 200a mainly includes a light source 220, a half mirror 230, and a concave mirror 240. The light source 220 functions as a fixation target projected onto the eye E. The concave mirror 240 reflects the fixation target light beam emitted from the light source 220 as a substantially parallel light beam (or reflects so as to have a predetermined distance-presenting distance).

  The fixation target light beam emitted from the light source 220 is reflected by the half mirror 230 and is coaxial with a reflected light beam from a subject to be described later. The fixation target light beam reflected by the half mirror 230 is reflected by the concave mirror 240. The fixation target light beam reflected by the concave mirror 240 is reflected by a reflection mirror 410 described later, passes through the presentation window 6 and enters the eye E to be examined. The concave mirror 240 reflects the fixation target light beam so as to make it a substantially parallel light beam (or reflects it so as to have a predetermined distance-presenting distance). For this reason, the fixation target viewed from the subject appears to be farther than the actual distance from the subject eye E to the light source 220. Thereafter, the fixation target light flux is reflected by a reflection mirror 410 described later, passes through the presentation window 6 and enters the eye E to be examined.

  The imaging optical system 200b images the face of the subject in the far vision state from the front direction. Note that the subject's face does not have to be the entire subject's face, but is at least a peripheral image of the subject's eye E (for example, a front image of the subject's face including at least the left and right eyes and a spectacle frame). May be). The imaging optical system 200b mainly includes an imaging element 210, an imaging lens 212, an aperture 214, an infrared filter 216, a half mirror 230, and a concave mirror 240.

  Illumination light from the illumination optical system 110 is reflected by the face of the subject and passes through the presentation window 6. The illumination light that has passed through the presentation window 6 is reflected by the reflection mirror 410. The reflected light reflected by the reflecting mirror 410 is reflected by the concave mirror 240, passes through the half mirror 230, and passes through the infrared filter 216. The infrared light that has passed through the infrared filter 216 passes through the diaphragm 214, is converged by the imaging lens 212, and then forms an image on the imaging element 210. The imaging element 210 is in a positional relationship conjugate with the pupil. The image sensor 210 detects light and outputs a detection signal at that time to the control unit 70.

<Near-measurement optical system>
A near measurement optical system (hereinafter also referred to as a second measurement optical system) 300 is an optical system for measuring the eye position of the eye E in a near vision state. The near measurement optical system 300 is divided into a second fixation target projection optical system 300a and a second imaging optical system 300b.

  The fixation target projection optical system 300a projects a near fixation target for fixing the subject to the near vision state on the eye E. The fixation target projection optical system 300a mainly includes a light source 320, a half mirror 330, and a convex lens 340. The light source 320 functions as a fixation target projected onto the eye E.

  The fixation target light beam emitted from the light source 320 is reflected by the half mirror 330 and is coaxial with the optical axis L2. The fixation target light beam reflected by the half mirror 330 passes through the convex lens 340 and is converged. Thereafter, the fixation target light flux is reflected by a reflection mirror 410 described later, passes through the presentation window 20 and enters the eye E to be examined.

  The imaging optical system 300b images the face of the subject in the near vision state from the front direction. The imaging optical system 300b mainly includes an imaging element 310, an imaging lens 312, an aperture 314, an infrared filter 316, a half mirror 330, and a convex lens 340.

  Illumination light from the illumination optical system 110 that illuminates the face of the subject passes through the presentation window 6 and is reflected by the reflection mirror 410. The reflected light reflected by the reflection mirror 410 passes through the convex lens and is converged. The converged light beam passes through the half mirror 330 and passes through the infrared filter 316. The infrared light that has passed through the infrared filter 316 passes through the aperture 314, is converged by the imaging lens 312, and then forms an image on the imaging element 310. The imaging element 310 is in a positional relationship conjugate with the pupil. The image sensor 310 detects light and outputs a detection signal at that time to the control unit 70.

<Optical system moving unit>
The near measurement optical system 300 includes an optical system moving unit 350. The optical system moving unit 350 holds the near measurement optical system 300 to be movable. The optical system moving unit 350 can move the entire near-field measurement optical system 300 in accordance with a change in the angle of the reflection mirror 410 described later during near-field measurement.

  By the way, when the angle of the reflection mirror 410 is changed by the optical path switching unit 400 described later, the optical path of the fixation target projection optical system 300a (index presentation distance) and the optical path of the second imaging optical system 300b change. End up. Therefore, the optical system moving unit 350 of the present embodiment moves the entire near-field measuring optical system 300 as the angle of the reflecting mirror 410 is changed. Thereby, even when the angle of the reflection mirror 410 is changed, the presentation distance of the near visual target is maintained. In addition, the focus state of the second imaging optical system 300b with respect to the eye E is maintained.

  The optical system moving unit 350 can separately move the convex lens 340 for adjusting the presentation distance and the light source 320 for projecting the fixation target. Accordingly, the optical system moving unit 350 can change the relative distance between the convex lens 340 and the light source 320 and change the presenting distance of the fixation target. The optical system moving unit 350 moves the optical member by driving the driving unit using a driving unit (not shown) such as a motor.

<Optical path switching unit>
Returning to FIG. 2, the optical path switching unit 400 will be described. The optical path switching unit switches the optical paths of the distance measurement optical system 200 and the near measurement optical system 300. Further, the optical path switching unit 400 changes the direction of the subject's line of sight during near-field measurement.

  The optical path switching unit 400 mainly includes a reflection mirror 410, a mirror holding unit 420, and a driving unit 440.

  The reflection mirror 410 is held by the mirror holding unit 420. The upper part of the mirror holding part 420 is held by a rotating shaft 425 fixed to the apparatus. The mirror holding part 420 can be rotated around the rotation axis of the rotation shaft 425. At this time, the mirror holding part 420 is rotated integrally with the reflection mirror 410. The reflection mirror 410 reflects the target light beam emitted from the distance measurement optical system 200 or the near measurement optical system 300 toward the eye E. The drive unit 440 is connected to the back surface of the mirror holding unit 420 by a link mechanism unit (not shown). By driving the drive unit 440, the driving force of the drive unit is transmitted to the mirror holding unit 420 via a link mechanism unit (not shown). The mirror holding part 420 is rotated around the rotation shaft 425 by the driving force transmitted from the link mechanism part 430. When the mirror holding portion is rotated, the reflection mirror 410 rotates around the rotation shaft 425.

  By rotating the reflection mirror 420, the optical path of the target luminous flux is changed, and the presentation position of the fixation target projected onto the eye E is changed. The subject's line-of-sight direction is changed by changing the presentation position of the fixation target. For example, by rotating the reflection mirror in the A direction (moved from the solid line portion to the dotted line portion), the optical path for photographing the subject is changed from the optical path of the distance measurement optical system 200 to the near measurement. The optical path of the optical system 300 is switched. In this way, the optical path switching unit 400 rotates the reflecting mirror 410 to change the fixation target presentation position, and changes the direction of the subject's line of sight in the vertical direction.

<Side imaging optical system>
FIG. 3 shows a schematic configuration diagram of the side imaging optical system 500. The side imaging optical system 500 acquires a side image of the subject by photographing the subject from the side. As shown in FIG. 3, the side imaging optical system 500 is fixed in the left-right direction of the position where the face of the subject is supported.

  The side imaging optical system 500 of the present embodiment is roughly divided into a left imaging optical system 500L arranged on the left side of the subject and a right imaging optical system 500R arranged on the right side of the subject. The left imaging optical system 500L images the subject from the left side. The right imaging optical system 500R images the subject from the right side.

  The left imaging optical system 500L mainly includes a mirror 530L, an infrared filter 540L, an aperture 550L, an imaging lens 560L, and an imaging element 570L.

  Similarly, the right imaging optical system 500R mainly includes a mirror 530R, an infrared filter 540R, an aperture 550R, an imaging lens 560R, and an imaging element 570R. In the following description, for convenience, the infrared filters 540L and 540R, the diaphragms 550L and 550R, the imaging lenses 560L and 560R, and the imaging elements 570L and 570R are collectively referred to as imaging units 575L and 575R.

  The infrared filters 540L and 540R absorb visible light and transmit infrared light. The imaging elements 570L and 570R receive the infrared light that has passed through the infrared filters 540L and 540R.

  In addition, an infrared light source is used for the adjustment light sources 590L and 590R in the present embodiment. By using the infrared light source and the infrared filter, it is possible to prevent the imaging lens and the like from being illuminated by disturbance light and appearing in a side image. However, it is not always necessary to use an infrared light source. A visible light source or the like may be used. In this case, an infrared filter is not necessary.

  Hereinafter, imaging of a side image will be described using the left imaging optical system 500L as an example. The illumination light beam from the illumination optical system 110 is reflected by the subject's face and the spectacle frame F. The reflected illumination light beam is incident on the left imaging optical system 500L. Thereafter, the illumination light beam is reflected by the mirror 530L. The reflected light beam reflected by the mirror 530L passes through the infrared filter 540L. The infrared light that has passed through the infrared filter 540L passes through the diaphragm 550L, and is then collected by the imaging lens 560L, and forms an image on the imaging surface of the imaging element 570L. The image sensor 570L transmits the detected captured image to the control unit 70. In this manner, the image sensor 570L captures the left side image of the subject. Similarly to the left imaging optical system 500L, a right side image of the subject is captured by the right imaging optical system 500R.

  Note that the measurement optical axes of the left and right side imaging optical systems 500L and 500R of the present embodiment are set so that the measurement optical axis L1 of the distance measurement optical system 200 coincides with the height in the Y-axis direction. .

<Control unit>
FIG. 4 is a block diagram showing a control system of this embodiment. The control unit 70 includes a CPU (processor), a RAM, a ROM, and the like. The CPU of the control unit 70 controls the spectacle matching image analysis apparatus 1. The RAM temporarily stores various information. The ROM of the control unit 70 stores various programs, initial values, and the like for controlling the operation of the eyeglass matching image analysis apparatus 1.

  The control unit 70 includes a non-volatile memory (hereinafter abbreviated as “memory”) 72, an operation unit 10, light sources 110L, 110R, 111L, 110R, 220, and 320, image sensors 210, 310, 570L, and 570R, an optical system moving unit. 350 drive units, drive unit 440, and the like are electrically connected.

  The memory 72 is a non-transitory storage medium that can retain stored contents even when power supply is interrupted. For example, a hard disk drive, a flash ROM, and a USB memory or the like that is detachably attached to the image analysis apparatus 1 for eyeglass matching can be used as the memory 72. The memory 72 processes a far vision image or a near vision image, a photographing control program for controlling the photographing of the side image, the far vision image or the near vision image, and the side image by the spectacle matching image analysis apparatus 1. An image processing program to be stored is stored. Further, the memory 72 stores various types of information relating to photographing, such as information on photographing positions of far-distance or near-field images and side images. Various operation instructions by the examiner are input to the operation unit 10.

<Automatic analysis method of front image>
Hereinafter, an example of the automatic analysis method will be briefly described. The control unit 70 detects pupil information (for example, pupil position, pupil diameter, etc.) and frame information (for example, frame width, frame position, etc.) from the front image by image processing. Then, the control unit 70 measures various spectacle wearing parameters based on the detection result. The spectacle wearing parameters are, for example, the interpupillary distance and the eye position height. Here, the eye position height is the height from the bottom of the spectacle lens surface to the pupil.

<Automatic analysis method for side images>
The control unit 70 may detect a spectacle wearing parameter (for example, a forward tilt angle) from the side image by image processing.

  In the present embodiment, the forward tilt angle is defined as an angle in the vertical plane between the optical axis of the lens and the visual axis (usually in the horizontal direction) of the eye in the first eye position. For example, at least two points on the frame are connected, and this is assumed to be the tilt of the lens surface, and the forward tilt angle is obtained. These two points may be automatically detected by the control unit 70, or may be arbitrarily designated manually by the examiner.

<Output to display>
When the analysis of the image is completed, the control unit 70 causes the display unit 15 to display the captured image and the parameters obtained by the analysis (see FIG. 5). The control unit 70 includes a processor (for example, a CPU) that performs various control processes and a storage medium that stores an analysis program. The processor executes processing described below according to the analysis program.

  As illustrated in FIG. 5, for example, the control unit 70 displays a captured image used for analysis. As the captured images, for example, captured images such as a front image 620, a left side image 621, and a right side image 622 are displayed. For example, the front image 620, the left side image 621, and the right side image 622 each include an eye to be examined and a spectacle frame.

  The front image 620 is a front image of the face of the subject captured by the image sensor 210 of the distance measurement optical system 200 or the image sensor 310 of the near distance measurement optical system 300. The front image 620 includes, for example, front images of both eyes of the subject and the spectacle frame.

  The left side image 621 is a left side image (side image) of the face of the subject imaged by the side imaging optical system 500L. In other words, the left side image 621 is an image when the subject is viewed from the right hand direction for the examiner facing the subject. The left side image 621 includes the left eye of the subject and the left side image of the spectacle frame.

  The right side image 622 is a right side image (side image) of the face of the subject imaged by the side imaging optical system 500R. In other words, the right side image 622 is an image when the subject is viewed from the left hand direction of the examiner facing the subject. The right side image 622 includes the right eye of the subject and the right side image of the spectacle frame.

  The left side image 621 is displayed on the right side of the front image 620 displayed on the display unit 15. That is, the left side image 621 is formed on the right side with respect to the front image when the examiner views the display screen of the display unit 15. The right side image 622 is displayed on the left side of the front image 620 displayed on the display unit 15. That is, the right side image 622 is formed on the left side with respect to the front image when the examiner views the display screen of the display unit 15.

  As described above, the measurement optical axis L1 of the distance measurement optical system 200 of this embodiment and the measurement optical axes of the left and right side imaging optical systems 500L and 500R have the same height in the Y-axis direction. Yes. When displaying the front image 620 and the left and right side images 621 and 622, the control unit 70 matches the heights of the images so that the positions corresponding to the measurement optical axes of the optical systems on the images match. You may let them. As a result, for example, the position of the corneal vertex shown in the front image 620 and the position of the corneal vertex shown in the side images 621 and 622 are displayed at the same height on the screen.

  Thus, on the display unit 15 of the present embodiment, the front image 620 and the left and right side images 621 and 622 of the subject are displayed as in a three-plane projection view. Here, the three-plane projection diagram is a diagram in which a diagram obtained by projecting an object drawn in the front view from the left is arranged on the left side of the front view, and a diagram projected from the right is arranged on the right side of the front view. In other words, in the present embodiment, the appearance of the face of the subject who has been facing from the left is displayed at the same height on the left side of the front image 620. Similarly, the appearance of the face of the subject who has been facing from the right is displayed at the same height on the right side of the front image 620.

  Since the left and right side images 621 and 622 are displayed as in the present embodiment, it can be easily observed whether or not the subject's face is shaken in the left-right direction. For example, in this embodiment, when the subject's face is facing the front, the left and right side images 621 and 622 are displayed at symmetrical positions with the front image 620 as the center. On the other hand, when the left and right side images 621 and 622 are displayed at a left-right asymmetric position around the front image 620, the examiner can confirm that the face of the subject is shaken in the left-right direction.

  In such a case, the shake of the face of the subject can be adjusted by adjusting the face support unit 5 so that the left and right side images 621 and 622 are symmetrical with respect to the front image 620. . If only one of the left and right side images 621 and 622 is displayed, it is difficult to determine how the face support unit 5 is adjusted even if the side images are observed.

  In addition, since the left and right side images 621 and 622 are displayed, the forward tilt angle, the spectacle wearing distance, and the like can be measured as described later.

  The control unit 70 may display the analysis result (eyeball rotation center position) acquired by the analysis on the left and right side images 621 and 622. For example, the center of eyeball rotation is easier to understand where the eyeball rotates around when it is displayed in the side images 621 and 622 than in the front image 620. In addition, it is easy to simulate the line of sight of the subject.

  In addition, the following points are mentioned as another side surface by displaying the front image 620 and the left and right side images 621 and 622 simultaneously.

  For example, in the present apparatus 1 of the present embodiment, the examiner can observe the state of the subject viewed from the front and left and right directions at a time. Therefore, the front image 620 and the left and right side images 621 and 622 can be observed simultaneously, and the relationship between the front and side of the subject can be easily confirmed.

  When performing eyeglass fitting, for example, when the position of the left frame F is moved, the position of the right frame also changes. Therefore, when the side images 621 and 622 are displayed on only one of the left and right sides, the left-right relationship cannot be observed, and the fitting of the glasses may not be successful. Compared to this, when the front image 620 and the left and right side images 621 and 622 are displayed, the adjustment can be made while looking at the relationship between the left and right directions, and the work becomes easy.

  In addition, since the front image 620 and the side images 621 and 622 are displayed at the same height, the relationship between the heights of the images can be easily grasped. For example, the pupil positions in the side images 621 and 622 can be obtained using the height of the pupil position in the front image 620 as a guide.

  Note that, as with the side imaging optical system of the present embodiment, for example, when an image is captured with a camera (for example, the image sensors 570L and 570R) via one reflecting member (for example, the half mirror 330), the captured image is captured. Appears to flip. Note that the number of reflection members is not limited to one, and when the image is captured by a camera via an odd number of reflection members, the captured image appears to be inverted.

  In such a case, the control unit 70 may display the captured image as a three-plane projection diagram, and thus the captured image may be reversed left and right by image processing. For example, the control unit 70 may display the left side image 621 captured by the side imaging optical system 500L on the display unit 15 by performing left-right inversion by image processing. Similarly, the control unit 70 may cause the right side image 622 captured by the side imaging optical system 500R to be horizontally reversed and displayed on the display unit 15.

  By reversing the photographed image, it is possible to match the state when the subject is actually observed with the state when displayed on the screen. As a result, it is possible to suppress confusion as to which of the left and right sides is taken as a side image. In addition, when fitting is performed with reference to the side images 621 and 622, it is possible to save time and effort to consider the inversion of the image.

  In the present embodiment, the control unit 70 performs magnification correction so that the scales of the left and right side images 621 and 622 are equal to the scale of the front image 620. For example, the control unit 70 may control the magnification of the front image 620 so that the scale of the front image 620 matches the scale of the left and right side images 621 and 622. The control unit 70 may control the magnification of the side images 621 and 622 so that the scale of the left and right side images 621 and 622 matches the scale of the front image 620. Further, the control unit 70 controls the magnification of the front image 620 and the magnification of the side images 621 and 622 so as to match the scale of the left and right side images 621 and 622 and the scale of the front image 620, respectively. May be.

<About magnification correction method>
A method for performing magnification correction will be described. For example, the photographing magnification is obtained in advance from the design data of each imaging optical system 200b, 300b, 500. Then, the magnification of each image is changed and displayed by image processing so that the difference in scale caused by the imaging magnification is eliminated.

  For example, it is assumed that the imaging magnification of the side imaging optical system 500 is 1/4, and the imaging magnification of the imaging optical system 200b is 1/2. At this time, the control unit 70 causes the display unit 15 to display the front image 620 by reducing it by a factor of two. By doing so, the scales of the front image 620 and the left and right side images 621 and 622 are equal.

  As described above, by displaying the front image 620 and the side images 621 and 622 at the same magnification, the analysis result of the image can be displayed in an easy-to-understand manner. Moreover, each image can be displayed without a sense of incongruity.

<About correspondence display>
In the present embodiment, the control unit 70 displays the front image 620 and the left and right side images 621 and 622 on the display unit 15 and displays the analysis result superimposed on each image. Here, the control unit 70 uses the front image 620 and the side image 621 (side image 622) as position information obtained from one of the front image 620 and the side image 621 (side image 622). It may be displayed superimposed on the other image. Note that the coordinate position in the front image 620 and the coordinate position in the side image 621 (side image 622) are associated in advance. That is, a positional correspondence between the front image 620 and the side image 621 (side image 622) is set.

  For example, when the pupil position is detected on the front image 620, the control unit 70 uses the correspondence relationship to display the position information corresponding to the pupil position detected on the front image 620 as the side image 621 (side It may be displayed so as to overlap the square image 622) (for example, horizontal line Ih3, horizontal line Ih4).

  For example, when the lens lower end position on the frame is detected on the front image 620, the control unit 70 uses the correspondence relationship to display the position information corresponding to the frame position detected on the front image 620 on the side. The image 621 (side image 622) may be displayed so as to overlap (for example, frame lower end line Fh2, frame lower end line Fh3). In the present embodiment, the lower end of the frame is the bottom of the spectacle lens surface.

  Of course, when the position (for example, pupil position, frame position) related to the eye or the frame is detected on the side image 621 (side image 622), the control unit 70 changes the correspondence relationship. The position information corresponding to the detected position detected on the side image 621 (side image 622) may be used by being superimposed on the front image 620.

  Note that the position related to the eye or the frame may be detected automatically or manually. The detection position related to the eye or the frame can be changed on the captured image due to the difference in the subject or the spectacle frame.

  Note that the result of the image analysis may be corrected by manually correcting the mark displayed on each image based on the analysis result. Hereinafter, the marks displayed on the display unit 15 will be described with reference to FIG.

  In the front image 620, for example, a left pupil mark PcL, a right pupil mark PcR, a horizontal line Ih1, a horizontal line Ih2, a frame lower end line Fh1, and the like are superimposed and displayed.

  The left pupil mark PcL indicates the pupil position of the left eye and is displayed at the pupil position obtained by image analysis. The right pupil mark PcR indicates the pupil position of the right eye and is displayed at the pupil position obtained by image analysis.

  The horizontal line Ih1 is a horizontal line passing through the eye position of the left eye, and extends in the left-right direction through the center of the left pupil mark PcL. The horizontal line Ih2 is a horizontal line passing through the right eye eye position, and extends in the left-right direction through the center of the right pupil mark PcR. A frame lower end line Fh1 indicates the position of the bottom of the spectacle frame F and extends in the left-right direction.

  In the left side image 621, for example, a horizontal line Ih3, a frame lower end line Fh2, a point PL, a point QL, a frame inclined line FiL, and the like are mainly superimposed and displayed.

  The horizontal line Ih3 is a horizontal line passing through the eye position of the left eye, and is displayed at a position corresponding to the height of the left pupil mark PcL and the horizontal line Ih1 displayed in the front image 620. The frame lower end line Fh2 indicates the height of the bottom of the spectacle frame F, and is displayed at a position corresponding to the height of the frame lower end line Fh1 displayed in the front image 620.

  The points PL and QL are displayed at positions on the frame detected by the analysis of the left side image 621. The frame inclination line FiL is a line segment connecting the point PL and the point QL.

  In the right side image 622, for example, a horizontal line Ih4, a frame lower end line Fh3, a point PR, a point QR, a frame inclined line FiR, and the like are mainly superimposed and displayed.

  The horizontal line Ih4 is a horizontal line passing through the eye position of the right eye, and is displayed at a position corresponding to the right pupil mark PcR and the height of the horizontal line Ih2 displayed in the front image 620. The frame lower end line Fh3 indicates the height of the bottom of the spectacle frame F, and is displayed at a position corresponding to the height of the frame lower end line Fh1 displayed in the front image 620.

  The points PR and QR are displayed at positions on the frame detected by the analysis of the right side image 622. The frame inclination line FiR is a line segment connecting the point PR and the point QR, and how much the frame F is inclined forward, that is, the forward inclination angle of the frame F can be visually recognized.

  5 to 7, the horizontal line Ih1 and the horizontal line Ih3, the horizontal line Ih2 and the horizontal line Ih4, the frame lower end line Fh1, the frame lower end line Fh2, and the frame lower end line Fh3 are connected to each other. However, the present invention is not limited to this and may be displayed separately.

  In the present embodiment, for example, the left pupil mark PcL and the horizontal line Ih1 and the horizontal line Ih3, or the frame lower end line Fh1 and the frame lower end line Fh3, both the front image 620 and the side images 621 and 622 have a height. Each corresponding mark is displayed. This facilitates the measurement of the spectacle wearing parameters by making the front image 620 and the side images 621 and 622 correspond to each other.

  For example, it is difficult to determine the pupil position because the side images 621 and 622 are difficult to recognize the viewing direction of the subject. However, for example, the pupil position can be easily obtained by obtaining the position where the horizontal lines Ih3 and Ih4 corresponding to the height of the pupil of the front image 620 intersect with the outline of the eyeball displayed in the side images 621 and 622. Can do. Like the horizontal lines Ih3 and Ih4, the marks displayed corresponding to the height of the pupil position obtained in the front image 620 assist in obtaining the pupil position in the side images 621 and 622.

  The obtained pupil positions in the side images 621 and 622 are used, for example, for measuring the spectacle wearing distance VD.

  As described above, the front image 620 and the side images 621 and 622 having the same height and magnification are displayed as shown in the three-view projection view, so that both the front image 620 and the side images 621 and 622 are displayed. Correspondence between marks displayed on the screen becomes clearer. For example, the horizontal line Ih1 and the horizontal line Ih3 are displayed at the same height on the screen.

<About manual measurement method using screen display>
An example of the operation of the present apparatus 1 when measuring spectacle wearing parameters will be described using the measurement screen described above. In this embodiment, the display position of the mark indicating the image analysis result can be manually adjusted by an examiner's input. For example, even if an error occurs in image analysis and the mark display position is deviated from the image, the mark display position can be adjusted to the image. Accordingly, the control unit 70 can measure the final spectacle wearing parameter from the adjusted mark.

<How to adjust the mark>
Hereinafter, a method of adjusting the mark display position will be described with reference to FIG. In FIG. 6, a mark shifted from an appropriate display position due to an error in image analysis is indicated by a broken line.

  For example, the left pupil mark PcL ′ indicated by a broken line in FIG. 6 is displayed shifted from the pupil position of the front image 620. Further, the horizontal line Ih1 ′ indicating the height of the eye position of the left eye and the horizontal line Ih3 ′ of the left side image 621 are also displayed at positions shifted from the appropriate display position.

  In this case, for example, the examiner adjusts the display position of the left pupil mark PcL ′ using a pointing device (not shown). Examples of the pointing device include a touch panel and a mouse. In the following description, the pointing device is a touch panel provided in the display unit 15.

<To adjust the left pupil mark>
The examiner touches the left pupil mark PcL ′ displayed on the front image 620 and performs a drag operation to the position of the pupil of the front image 620. At this time, the control unit 70 moves the display position of the left pupil mark PcL ′ to the position of the pupil of the front image 620.

  At this time, the control unit 70 moves the display position of the left pupil mark PcL ′, and moves and displays the horizontal line Ih1 ′ and the horizontal line Ih3 ′ in conjunction with the movement of the left pupil mark PcL ′. That is, the control unit 70 controls the display so that the height of the left pupil mark PcL ′ is synchronized with the heights of the horizontal line Ih1 ′ and the horizontal line Ih3 ′.

  Thus, by displaying the mark of the front image 620 and the marks of the side images 621 and 622 in conjunction with each other, it is only necessary to adjust the position of the mark displayed on one side, and the operation is simplified.

  In the above description, the horizontal line Ih1 ′ and the horizontal line Ih3 ′ are displayed in conjunction with each other by adjusting the left pupil mark PcL ′ displayed in the front image 620. However, the present invention is not limited to this. For example, the control unit 70 may link the left pupil mark PcL ′ and the horizontal line Ih3 ′ when moving the horizontal line Ih1 ′. Further, when moving the horizontal line Ih3 ′ displayed in the side image, the control unit 70 may link the left pupil mark PcL ′ and the horizontal line Ih1 ′ displayed in the front image 620.

  Of course, the control unit 70 may similarly control not only the front image 620 and the left side image 621 but also the front image 620 and the right side image 622 regarding the control in which the mark positions are displayed in conjunction with each other.

  Other marks can be adjusted in the same manner as the left pupil mark PcL ′. For example, a frame lower end line Fh1 ′ indicated by a broken line in FIG. 6 is displayed shifted from the frame lower end due to an error in image analysis. Similarly, the frame lower end line Fh2 ′ and the frame lower end line Fh3 ′ displayed corresponding to the height of the frame lower end line Fh1 ′ are also shifted from the frame lower end.

  Also in this case, by adjusting the display position of any one frame bottom line, the display positions of other frame bottom lines are also adjusted.

  Further, a point PR ′ indicated by a broken line in FIG. 6 is displayed so as to be shifted from the upper end of the frame of the side images 621 and 622 due to an image analysis error. Further, the frame inclination line FiR ′ connecting the points PR ′ and QR is also displayed deviated from the appropriate position.

  In this case as well, the position of the point PR ′ or the frame tilt line FiR ′ can be adjusted by a pointing device in the same manner as described above.

  In the above description, the control unit 70 has been described as correcting the image magnification so that the scales of the front image 620 and the side images 621 and 622 are equal. However, the present invention is not limited to this.

  For example, the imaging magnification is different in the distance measuring optical system 200 and the near measuring optical system 300. This is because the optical distance from the image sensor 210 or the image sensor 310 to the cornea is different.

  For this reason, the control unit 70 may correct the magnification of the image so that the scales of the front images 620 taken by each optical system are equal. For example, the front image 620 photographed by the distance measurement optical system 200 and the front image 620 photographed by the near measurement optical system 300 are switched and displayed on the display unit 15. In this case, the control unit 70 performs magnification correction so that the scales of the images are the same. At this time, the magnification of the front image 620 may be corrected so that the scale of the front image 620 in the far vision state and the near vision state is equal to the scale of the side images 621 and 622.

  As described above, the front image 620 and the side images 621 and 622 are always displayed with the same scale. This makes it easy for the examiner to grasp the correspondence between the front image 620 and the side images 621 and 622. In addition, the examiner is prevented from being confused by changes in the scale of the image.

  When the scale is smaller than that of the side images 621 and 622 and the image needs to be enlarged, the enlarged image can display only the area corresponding to the side images 621 and 622 on the display unit 15. As a result, unnecessary parts (such as the background reflected behind the subject) can be removed and the display is difficult to see compared to when the image is not enlarged.

  In the present embodiment, the optical system moving unit 350 can change the presenting distance of the fixation target during near-field measurement. At this time, the position of the image sensor 310 is changed by the optical system moving unit 350. Then, the photographing magnification of the front image 620 photographed by the near measurement optical system 300 changes. This is because the image sensor 310 moves with the movement of the fixation target light source (such as the light source 320). When the imaging magnification changes, the scale of the front image 620 displayed on the display unit 15 also changes.

  For example, when the near presentation distance is changed from 25 cm to 50 cm, the imaging magnification of the imaging optical system 300b becomes small. This is because shooting from a distance is smaller than the actual size.

  For this reason, since the scale of the image changes every time the presenting distance of the fixation target is changed, the magnification display of the front image 620 and the left and right side images 621 and 622 does not match, and the correspondence between the left and right is difficult to see. End up. In some cases, the scale of the image becomes small, and there is a possibility that it is difficult to observe the area around the spectacles that is the measurement target.

  In order to suppress this, the control unit 70 is configured so that the scales of the front image 620 and the left and right side images 621 and 622 are equal even if the shooting magnification changes with the change in the fixation target presentation distance. Correct the image magnification. For example, the imaging magnification corresponding to the target presentation distance is obtained in advance from the design data of each of the imaging optical systems 300b and 500. The control unit 70 may perform image processing so that the scales of the images are equal based on the imaging magnification corresponding to the target presentation distance. In addition, the control unit 70 is not limited to this, and the control unit 70 matches the front image 620 and the left and right so that the dimensions of the shooting target common to the front image and the side image (for example, the distance from the upper end to the lower end of the frame) match. The scale between the side images 621 and 622 may be corrected by image processing.

  As described above, by changing the magnification of the front image 620 in accordance with the change in the imaging magnification, the examiner is suppressed from being confused by the change in the scale of the front image 620. For example, the reduction in the scale of the image and the difficulty in viewing the display are reduced. Further, since the front image 620 and the side images 621 and 622 are displayed with the same scale, it is easy to grasp the correspondence between the images.

  In the present embodiment, the distance measurement optical system 200 and the side imaging optical system 500 are set so that the heights of the measurement optical axes in the Y-axis direction coincide with each other. Not exclusively.

  For example, when the height of the measurement optical axis of each optical system is deviated, the control unit 70 may display the front image 620 and the left and right side images shifted by the deviation amount.

  For example, a jig with marks or scales on the front and left and right is photographed by the distance measuring optical system 200 and the side imaging optical system 500. And the control part 70 should just shift and display an image so that the mark of the image | photographed front image 620 and the left and right side images 621 and 622 may become the same height on a screen.

  Thus, by matching the heights of the front image 620 and the side images 621 and 622, the correspondence between the front image 620 and the side images 621 and 622 becomes clear. This makes it easier for the examiner to measure the spectacle wearing parameters. In addition, the feeling of discomfort generated by the examiner is reduced compared to a state in which the left and right heights do not match.

  In the present embodiment, the front image 620 and the left and right side images 621 and 622 are displayed on one display unit 15. However, the present invention is not limited to this. The front image 620 may be displayed on one of a plurality of display units provided independently, and the side images 621 and 622 may be displayed on another display unit. This also exhibits the same effect as this embodiment.

  In the present embodiment, the control unit 70 displays the marks corresponding to the front image 620 and the side images 621 and 622, but the present invention is not limited to this.

  The control unit 70 may display marks corresponding to the left side image 621 and the right side image 622, respectively. For example, the control unit 70 receives an input signal to the operation unit 10 by the examiner, and moves the frame lower end line Fh2 displayed on the left side image 621 to display it by moving it upward or downward. The control unit 70 may display the frame lower end line Fh3 displayed in the right side image 622 by moving it upward or downward in conjunction with the movement of the frame lower end line Fh2.

  As another example, vertical reference lines (not shown) extending in the vertical direction are displayed in the left and right side images 621 and 622, respectively. This vertical reference line is, for example, a line for indicating an alignment reference in the working distance direction. The control unit 70 receives an input signal to the operation unit 10 by the examiner and moves the vertical reference line displayed on the left side image 621 to the left and right for display, for example. The control unit 70 may move the vertical reference line displayed in the right side image 622 to the left and right in conjunction with the display of the left side image 621.

  Note that the left side image 621 and the right side image 622 are displayed oppositely in the working distance direction. Therefore, for example, when the vertical reference line of the left side image 621 is moved to the left and displayed, the control unit 70 moves the vertical reference line of the right side image 622 to the right and displays it.

  Similarly, when the vertical reference line displayed in the right side image 622 is moved and displayed, the control unit 70 similarly displays the vertical reference line of the left side image 621 in conjunction with it.

  Further, as shown in FIG. 7, a mark M for measuring the spectacle wearing distance VD may be displayed on the side images 621 and 622. For example, when the examiner adjusts the length of the mark M to be equal to the distance from the apex of the cornea to the distance from the lens surface, the control unit 70 can obtain the spectacle wearing distance VD from the length of the mark M. For example, the control unit 70 may display the mark M on a horizontal line passing through the pupil marks PcL and PcR. Further, the control unit 70 may display the mark M by moving it up and down in conjunction with the vertical movement of the pupil marks PcL and PcR.

  In the above description, the spectacle frame F with a rim has been described, but there are spectacle frames without a rim (for example, a two-point frame) (see FIG. 7). When a spectacle frame without a rim is photographed from the front direction, the outline of the frame (or lens) is very thin, and it may be difficult for the examiner to identify the edge of the lens from the front image 620. It may be difficult for the control unit 70 to detect the edge of the lens.

  On the other hand, when a spectacle frame without a rim is photographed from the side, the thickness of the lens becomes the contour of the frame (or lens). Therefore, the examiner can identify the edge of the lens from the side images 621 and 622. The control unit 70 can easily detect the edge of the lens.

  As described above, for the examiner or the control unit 70, the side images 621 and 622 may more easily identify the edge of the lens than the front image 620. In this case, for example, the control unit 70 may display the horizontal line Fh3 aligned with the lower end of the lens identified from the side images 621 and 622, and move the horizontal line Fh1 of the front image in conjunction therewith.

  As described above, the control unit 70 not only interlocks the mark displayed on the side images 621 and 622 with the mark displayed on the front image 620. The mark displayed on the front image 620 may be linked to the side images 621 and 622.

  In the above description, the side images 621 and 622 are displayed on the left and right of the front image 620 on the display unit 15. However, the present invention is not limited to this. For example, the control unit 70 may display the side images 621 and 622 above or below the front image 620.

  Even in such a case, the examiner can observe the left and right side images 621 and 622 to check the shake of the subject's face or the spectacle wearing distance.

  Even if the side images 621 and 622 are not arranged on the left and right of the front image, the control unit 70 can display marks corresponding to each other on each image. This makes it easy to measure the spectacle wearing parameters by relating the front image 620 and the side images 621 and 622.

  In the present embodiment, three images, that is, the front image 620 and the left and right side images 621 and 622 are displayed. However, the present invention is not limited to this. For example, even when two images of the front image 620 and the left and right side images 621 and 622 are displayed, the magnification may be corrected by image processing or the like so that the scales of the two images are equal. Good. Also, marks corresponding to two images may be displayed on each image.

  In the above description, when the magnification correction of the front image 620 and the side images 621 and 622 is performed, the control unit 70 performs image processing. However, it is not limited to this image processing. For example, the imaging optical system 200b, the imaging optical system 300b, and the side imaging optical system 500 may be designed to have the same shooting magnification. As a result, the scales of the captured images can be made equal.

  Further, the control unit 70 may change the magnification of the image by moving an optical member or an optical element of each imaging optical system by controlling a drive unit (not shown).

  Note that the spectacle wearing parameter measurement device 1 of the present embodiment includes a plurality of imaging optical systems and takes an image of a subject. However, the configuration is not limited to this. For example, the imaging optical system may not be provided. In this case, the image data of the subject imaged by the imaging optical system outside the apparatus is received by various data communication means. Then, the spectacle wearing parameters of the subject may be measured based on the received image.

DESCRIPTION OF SYMBOLS 1 Glasses wearing parameter measurement apparatus 5 Face support unit 6 Presentation window 10 Operation unit 15 Display part 70 Control part 200 Distance measurement optical system 210 Image sensor 214 Aperture 220 Light source 300 Near-field measurement optical system 310 Image sensor 314 Aperture 320 Light source 410 Reflection Mirror 500 Side imaging optical system 620 Front image 621 Left side image 622 Right side image F Eyeglass frame Ih1 Horizontal line

Claims (5)

A front imaging optical system that captures a front image of the subject wearing a spectacle frame, the front imaging optical system being capable of changing an imaging distance to the subject, and a side of the subject wearing the spectacle frame A lateral imaging optical system that captures a side image, and a spectacle wearing parameter measurement device for measuring spectacle wearing parameters based on the front image and the side image,
Display control means for displaying the front image captured by the front imaging optical system and the side image captured by the side imaging optical system on a display unit;
The magnification of at least one of the front image and the side image is set so that the scale between the front image and the side image displayed on the display unit becomes equal regardless of the change in the imaging distance. Magnification correction means for correcting according to a change in imaging distance;
A spectacle wearing parameter measuring device comprising: The magnification correction means includes
The magnification of the front image is corrected according to the change in the imaging distance so that the scale between the front image and the side image displayed on the display unit becomes equal regardless of the change in the imaging distance. In addition, the spectacle wearing parameter measurement device according to claim 1, wherein a magnification of the side image is maintained. A fixation target presenting optical system comprising a fixation target for fixing the subject, and capable of changing a fixation distance of the fixation target with respect to the subject,
The front imaging optical system is a front imaging optical system that can change the imaging distance according to the change of the presentation distance and that captures the front image through a diaphragm,
When the presentation distance is changed, the optical presentation distance of the fixation target with respect to the eye to be examined is equal to the optical distance of the diaphragm with respect to the eye to be examined. A spectacle wearing parameter measuring apparatus comprising a distance variable unit that changes an optical distance. A front imaging optical system that captures a front image of the subject wearing a spectacle frame, the front imaging optical system being capable of changing an imaging distance of the front imaging optical system with respect to the subject; A spectacle wearing parameter measuring imaging device for measuring spectacle wearing parameters based on an image,
Display control means for displaying at least the front image captured by the front imaging optical system on a display unit;
Magnification correction means for correcting the magnification of the front image according to the change in the imaging distance so that the scale of the front image displayed on the display unit is equal regardless of the change in the imaging distance;
A spectacle wearing parameter measuring device comprising: A front imaging optical system that captures a front image of the subject wearing a spectacle frame, the front imaging optical system being capable of changing an imaging distance to the subject, and a side of the subject wearing the spectacle frame A spectacle wearing parameter measurement program executed in a spectacle wearing parameter measurement device for measuring spectacle wearing parameters based on the front image and the side image. There,
By being executed by the processor of the spectacle wearing parameter measurement device,
A display control step of displaying the front image captured by the front imaging optical system and the side image captured by the side imaging optical system on a display unit;
The magnification of at least one of the front image and the side image is set so that the scale between the front image and the side image displayed on the display unit becomes equal regardless of the change in the imaging distance. A magnification correction step for correcting according to a change in imaging distance;
Is executed by the spectacle wearing parameter measurement apparatus.

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