JP2015031847A - Spectacle parameter calculation device, and spectacle parameter calculation program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spectacle parameter calculation device capable of providing information useful for reducing the displacement in the astigmatism axial direction, and to provide a spectacle parameter calculation program.SOLUTION: The spectacle parameter calculation device for calculating a spectacle parameter for producing spectacles includes display controlling means that corrects a ball type diagram indicating a ball type on the basis of the warp angle and forward-tilt angle of a spectacle frame in use and makes a display unit display the corrected ball type diagram.

Description

  The present invention relates to a spectacle parameter calculation device and a spectacle parameter calculation program for calculating spectacle parameters for manufacturing spectacles.

  In order to process a spectacle lens into a shape suitable for a spectacle frame, a spectacle lens processing apparatus including a processing tool such as a grindstone or a cutter is known (for example, Patent Document 1).

  Also, there is known a marking device that applies a marking for defining the optical center of the spectacle lens or the reference direction of the astigmatic axis (for example, Patent Document 2).

  A cup attachment device for attaching a cup as a processing jig to a spectacle lens is known (for example, Patent Document 3).

  For example, the cup attachment device attaches the cup to the spectacle lens based on the marking point applied by the marking device. The eyeglass lens processing apparatus chucks the eyeglass lens with the cup attached by the cup attachment device as a reference, and processes the eyeglass lens into a shape suitable for the eyeglass frame.

JP 2010-060326 A JP 2008-241694 A JP 2008-299140 A

  By the way, when producing spectacles, the lens shape of the spectacle frame is measured by a lens shape measuring unit such as a tracer. At this time, the horizontal direction of the target lens shape is defined by the target lens shape measuring unit.

  However, in the lens shape of a spectacle frame with a large warping angle such as a high curve frame, the horizontal direction of the target lens specified by the target lens shape measurement unit may be shifted from the horizontal direction of the wearer when wearing the spectacles. .

  For this reason, when the spectacle lens is processed on the basis of the horizontal direction of the target lens shape defined by the target lens shape measuring unit, the astigmatic axis direction of the lens with respect to the eye to be examined may be shifted.

  In view of the above-described problems of the prior art, it is an object of the present invention to provide a spectacle parameter calculation device and a spectacle parameter calculation program that can provide useful information for reducing the deviation in the astigmatic axis direction.

  In order to solve the above problems, the present invention is characterized by having the following configuration.

(1) A spectacle parameter calculation device that calculates spectacle parameters for manufacturing spectacles, and corrects and displays a target lens figure representing a target lens shape based on a warp angle and a forward tilt angle of the spectacle frame when worn. Display control means for displaying the corrected target lens figure on the part.
(2) A spectacle parameter calculation program executed in a spectacle parameter calculation device that calculates spectacle parameters for manufacturing spectacles, and is executed by a processor of the spectacle parameter calculation device, thereby Based on the warp angle and the forward tilt angle, the eyeglass parameter calculation device is caused to execute a display control step of correcting a target lens shape representing a target lens shape and displaying the corrected target lens shape graphic on a display unit. .

It is an external appearance perspective view of a cup attaching device and a wearer photographing device. It is a schematic block diagram inside the housing | casing of an apparatus. It is a figure explaining the method to image | photograph the front image of a spectacles wearer. It is a schematic block diagram of the measurement mechanism arrange | positioned inside the target lens shape measurement unit. It is explanatory drawing of a lens support mechanism. It is a schematic block diagram of an optical system. It is a control system block diagram of an apparatus. It is a figure for demonstrating a forward inclination angle. It is a figure explaining the correction method of the two-dimensional target lens shape projected to the curvature direction. It is a figure explaining the correction method of the two-dimensional target lens shape projected to the curvature direction. It is a figure which shows the two-dimensional target lens shape data projected to the curvature direction. It is a figure which shows an example of the method of calculating | requiring the curvature angle of a spectacles frame. It is a figure explaining the shift | offset | difference of the horizontal direction of eyeglass data and the processed spectacle lens. It is a figure which shows a mode when a curvature angle is added to two-dimensional target lens data. It is a figure which shows a mode when a curvature angle and a forward tilt angle are added to two-dimensional target lens data. It is a figure which shows the relationship between a curvature angle, a forward inclination angle, and a rotation angle. It is a figure for demonstrating the structure of the rotation angle setting screen displayed on a monitor at the time of rotation angle setting mode. It is a figure which shows the control flowchart of this embodiment. It is a figure for demonstrating a perspective projection method. It is a figure for demonstrating a perspective projection method. It is a figure for demonstrating the size change method of a target lens figure. It is a figure for demonstrating the rotation method of a target lens figure. It is a figure which shows an example of the screen displayed on the monitor at the time of blocking.

  The spectacle parameter calculation device of this embodiment will be described as a cup attachment device 1 for attaching a cup Cu as a processing jig to a spectacle lens.

  Hereinafter, the structure of the cup mounting apparatus 1 of this embodiment is demonstrated based on drawing. FIG. 1 is an external perspective view of a wearer photographing apparatus (hereinafter abbreviated as a photographing apparatus) 600 for photographing a cup mounting device 1 and a wearer Wr of glasses. 2 is a schematic configuration diagram of the inside of the housing of the cup mounting device 1, FIG. 2 (a) is a view of the cup mounting device 1 seen from the front, and FIG. 2 (b) is a side view of the cup mounting device. It is a figure. In the present embodiment, the cup mounting device 1 and the photographing device 600 are connected by wire or wirelessly. The image of the spectacle wearer Wr photographed by the photographing device 600 is transferred to the cup mounting device 1 by wire or wirelessly.

<Wearing device>
The wearer photographing apparatus 600 mainly includes a chair 601 for sitting the wearer Wr, a half mirror 602, a wall 603, a digital camera 604, and a memory 606. The half mirror 602 is fitted in a hole in the wall 603. A digital camera 604 is fixed to the back of the half mirror 602 when viewed from the wearer Wr.

  FIG. 3 is a view for explaining a method of photographing the front image 22 of the spectacle wearer Wr by the photographing apparatus 600. The wearer Wr adjusts the height of the chair 601 (see FIG. 1) so that the position of his / her eyes reflected on the half mirror 602 matches the height reference mark 605 marked on the wall 603. When the height adjustment of the chair 601 is completed, the wearer Wr stands by looking at the lens of the digital camera 604 through the half mirror 602. The operator presses a photographing button (not shown) to photograph a front image 22 (see FIG. 17) of the wearer Wr described later. Thus, it is possible to take an image when the wearer Wr sees the state of wearing glasses from the front.

  Note that the photographing apparatus 600 may use, for example, a configuration such as an ID photo photographing apparatus described in JP-A-10-055018.

<Cup mounting device>
The cup mounting apparatus 1 will be described with reference to FIG. A bead shape measurement unit (hereinafter abbreviated as a measurement unit) 5 is disposed in the upper back of the cup mounting device 1. An operation switch unit 4 of the measurement unit 5 and a color display touch panel 3 on which an operation screen is displayed are arranged on the top of the housing in front of the measurement unit 5. Although the touch panel 3 of this embodiment is used as a display part and an operation part, it is not restricted to this. For example, the display unit may be a display or the like, and the operation unit may be a mouse or the like. A lens support mechanism 100 is disposed on the upper portion of the pedestal 1 a that protrudes forward from the cup mounting device 1. The lens support mechanism 100 has three support pins 120 on which the lens LE is placed. A cup attachment mechanism 300 for fixing the cup Cu to the lens surface is arranged on the right side of the cup attachment device 1. A mounting portion 320 to which the base of the cup Cu is mounted is disposed at the tip of the arm 310 of the cup mounting mechanism 300. A switch 2 for operating the cup mounting mechanism 300 is disposed on the front side of the base 1a.

  This will be described with reference to FIG. A concave mirror 13 is tilted and disposed on the overhanging upper portion 1 b that projects to the front side of the cup mounting device 1. The imaging optical system 30 is arranged in the optical axis L2 direction in which light from the optical axis L1 passing through the center of the lens support mechanism 100 is reflected by the concave mirror 13. The imaging optical system 30 includes an imaging element that captures an image of the lens LE.

<Ball shape measurement unit>
The measurement unit 5 will be described with reference to FIG. The measurement unit 5 includes a first slider 202, a second slider 203, and a measurement mechanism 220.

  The first slider 202 and the second slider 203 are opposed to each other. The first slider 202 includes a pair of clamp pins 230Ra and 230Rb and a pair of clamp pins 230La and 230Lb. The second slider 203 includes a pair of clamp pins 240Ra and 240Rb and a pair of clamp pins 240La and 240Lb.

  The clamp pins 230Ra and 230Rb clamp the right rim FR (see FIG. 3) of the spectacle frame F from the thickness direction (vertical direction). The clamp pins 230La and 230Lb clamp the left rim of the spectacle frame F from the thickness direction (vertical direction). Similarly, the clamp pins 240Ra and 240Rb clamp the right rim FR of the spectacle frame F from the thickness direction (vertical direction). The clamp pins 240La and 240Lb clamp the left rim FL of the spectacle frame F from the thickness direction (vertical direction).

  The clamp pins are arranged at the same height, and in this embodiment, a surface including the clamp centers of the four pairs of clamp pins (for example, contact points when the upper and lower clamp pins are brought into contact with each other) is defined as the measurement reference surface M. Is done. At the time of measurement, the spectacle frame F is fixed by being clamped by four pairs of clamp pins. The clamp pin opening / closing mechanism described in JP-A-4-93163 can be used.

  FIG. 4 is a schematic configuration diagram of the measurement mechanism 220 arranged inside the target lens shape measurement unit 5. The measurement mechanism 220 includes a pulse motor 221, a rotation base 222, a fixed block 225, a horizontal movement support base 227, a vertical movement support base 229, a left / right movement support base 226, a measurement element shaft 231, a measurement element 233, a motor 235, an encoder 236, and a motor. 238, an encoder 239, a motor 234, and an encoder 237 are mainly provided.

  The pulse motor 221 rotates the rotation base 222 in the horizontal direction. The rotation base 222 is fixed to the fixed block 225. The horizontal movement support base 227 is supported by a fixed block 225 so as to be movable in the left-right direction in FIG. The vertical movement support base 229 is supported by the horizontal movement support base 227 so as to be movable in the vertical direction in FIG.

  The probe shaft 231 is rotatably provided on the vertical movement support base 229. The probe 233 is attached to the upper end of the probe shaft 231. The tip of the probe 233 is on the axis on the probe axis 231. The motor 235 moves the vertical movement support base 229 up and down. The encoder 236 detects the amount of movement of the vertical movement support base 229. The motor 238 moves the horizontal movement support base 227 horizontally. The encoder 239 detects the amount of movement of the horizontal movement support base 227. The motor 234 moves the left-right movement support base 226 to the left and right. The encoder 237 detects the amount of movement of the left / right movement support base 226.

  When the vertical movement support base 229 and the horizontal movement support base 227 are moved by the motors 235 and 238, the measuring element 233 is moved in the vertical direction and the horizontal direction. When the left / right movement support base 226 is moved by the motor 234, the measurement mechanism 220 is moved between the right rim measurement position and the left rim measurement position of the spectacle frame F. Each motor and encoder are connected to the control unit 50.

  The configuration of the measurement unit 5 is not limited to the above configuration. For example, the configuration described in JP 2010-60326 A can also be used.

<Cup attachment mechanism>
The configuration of the cup attachment mechanism 300 will be described with reference to FIG. The arm 310 that holds the mounting portion 320 is attached to the arm holding base 312. The holding base 312 is held by the Y-axis direction moving mechanism 302 so as to be movable in the front-rear direction (Y-axis direction) toward the cup mounting device 1. The Y-axis direction moving mechanism 302 is held by a Z-axis direction moving mechanism 304 so as to be movable in the vertical direction (Z-axis direction). The Z-axis direction moving mechanism 304 is held by the X-axis direction moving mechanism 306 so as to be movable in the left-right direction (X-axis direction) toward the cup mounting device 1. These moving mechanisms 302, 304, and 306 can be configured by known moving mechanisms having a slide mechanism, a motor, and the like.

  The mounting portion 320 is held by the arm 310 so as to be rotatable about the axis of the cup Cu attachment center axis S1 (see FIG. 2A). A motor 330 for rotating the mounting portion 320 is disposed on the arm holding base 312, and a rotation transmission mechanism 331 including a shaft and gears rotated by the motor 330 is disposed in the arm. Then, the mounting portion 320 is rotated about the central axis S <b> 1 by the rotation of the motor 330. As a result, the direction defining the astigmatic axis of the cup Cu attached to the attachment part 320 is changed.

  The cup attachment mechanism is not limited to the above configuration. A cup holding part (for example, mounting part 320) that can hold the cup is provided, and the cup held by the cup holding part is moved or rotated relative to the spectacle lens so that the lens LE is aligned with the lens LE. As long as it can be attached.

<Lens support mechanism>
FIG. 5 is an explanatory diagram of the lens support mechanism 100. A retroreflecting member and a light receiving optical system, which will be described later, are disposed inside the cylindrical base 102. A transparent protective cover 48 is attached to the upper part of the cylindrical base 102 by a ring member 104. The protective cover 48 also serves as a lens table. Rotating shafts 110 are rotatably held at three locations on the outer periphery of the cylindrical base 102. An arm 114 is attached to the upper end of each rotating shaft 110. A support pin 120 is attached to the tip of each arm 114. The three support pins 120 on which the lens LE is placed are arranged at an equal distance with respect to the optical axis L1 and at an equal angle (120 degree interval). The rear surface of the lens LE is brought into contact with the upper ends of the three support pins 120, and the lens LE is held. The rotation of the motor 140 is transmitted to each rotation shaft 110 by a rotation transmission mechanism (not shown). As a result, each arm 114 is moved from the retracted position in FIG. 5A to the support position indicated by the dotted line in FIG.

  In the above description, the arm 114 is moved by the motor 140. However, the present invention is not limited to this, and a rotation transmission member such as a lever may be provided and the arm 114 may be moved in conjunction with a manual operation.

<Optical system>
FIG. 6 is a schematic configuration diagram of an optical system of the cup mounting device 1. The illumination optical system 10 directs illumination light traveling along the optical axis L2 from the light source 11 such as an LED that emits white light, the half mirror 12 disposed on the optical axis L2, and the optical axis L1. And a concave mirror 13 that shapes the substantially parallel light beam having a larger diameter than the lens LE placed on the optical axis L1. The lens LE is irradiated with illumination light from the lens surface side by the illumination optical system 10.

  On the optical axis L1 on the rear surface side of the lens LE, an index plate 16 for detecting an optical center of the lens and the like, and a two-dimensional light receiving element (an image sensor such as a CCD) that receives a light beam that has passed through the index plate 16 are provided. A light receiving optical system 15 comprising 18 is arranged. A configuration in which a lens is disposed between the index plate 16 and the light receiving element 18 may be employed. A large number of openings (light passage openings) having a predetermined pattern are geometrically arranged on the indicator plate 16.

  The lens LE is illuminated with illumination light from the illumination optical system 10. The illumination light that has passed through the lens LE passes through the opening of the indicator plate 16, the opening image is received by the light receiving element 18, and the coordinate position of the opening image is detected.

  In FIG. 6, a retroreflective member 20 that returns incident light to the original direction is disposed between the lens LE and the indicator plate 16. The reflecting member 20 of the present embodiment includes a first reflecting member 20a disposed at the center of the optical axis L1 and an annular second reflecting member 20b disposed around the first reflecting member 20a.

  The first reflecting member 20a is affixed and fixed to the upper surface of the indicator plate 16. On the other hand, the second reflecting member 20b is affixed to a disk member 40 having an opening at the center, and is rotated around the optical axis L1 by a rotation mechanism (not shown).

  An imaging optical system 30 that images the lens LE illuminated by the reflected light of the retroreflecting member 20 is disposed on the surface side of the lens LE. The imaging optical system 30 shares the concave mirror 13 of the illumination optical system 10, and includes an aperture 31, an imaging lens 32, and an imaging element 33 such as a CCD disposed behind the half mirror 12 on the optical axis L2. The diaphragm 31 is disposed at a substantially focal position of the concave mirror 13 and has a positional relationship that is substantially conjugate with the light source 11. The imaging magnification of the imaging optical system 30 is a magnification at which the entire unprocessed lens is imaged by the imaging element 33. Further, the focus position of the image sensor 33 is adjusted to the vicinity of the surface of the lens LE by the imaging optical system of the imaging lens 32 and the concave mirror 13. As a result, the image mark 33, the progressive mark, and the small lens boundary portion of the bifocal lens are imaged with the image sensor 33 being substantially in focus.

<Control system>
FIG. 7 is a block diagram of the control system of the apparatus. Outputs of the light receiving element 18 and the imaging element 33 are connected to the control unit 50. The control unit 50 performs image processing on the lens image picked up by the image pickup device 33, and detects the positions of mark points, progressive marks, small lens boundaries of the bifocal lens, outer edge of the lens, etc. Has function. In addition, the control unit 50 detects the coordinate position of the index image (aperture image) received by the light receiving element 18, and based on this, the optical center position of the lens LE, the astigmatic axis angle, and the approximate refractive power of the lens ( It has a function to detect spherical power S, astigmatism power C) and the like.

  A process in which the control unit 50 detects the optical center position and the astigmatic axis angle of the lens LE will be briefly described. When the lens LE is not placed on the optical axis L1 (or when a 0D lens is placed), the lens LE having refractive power is determined with reference to the coordinate position of the aperture image received by the light receiving element 18. When placed, the light receiving position of each aperture image changes. The optical center of the lens LE is detected by obtaining the center of position change of each aperture image. Further, when the lens LE has an astigmatism power, the astigmatism axis angle is detected by obtaining the direction of change in position of each aperture image. As this detection method, a method similar to that disclosed in JP-A-2002-292547 can be employed. The optical center and astigmatic axis angle of the lens LE can be detected based on an index image of at least three apertures in principle, as in the measurement of the refractive characteristics of the lens meter. Preferably, it is set as an index of a large number of geometric patterns as in this embodiment. The index is not limited to a circular opening, but may be a fixed pattern.

  The controller 50 is connected to moving mechanisms 302, 304, 306 and motors 330, 140 of the cup mounting mechanism 300, and further includes a touch panel 3, a target lens shape measuring unit 5, a switch 2, an image sensor 33, a memory 51, and the like. It is connected.

<Operation of the lens shape measuring unit>
The operation of the measurement unit 5 will be briefly described. Please refer to FIG. First, the operator fixes the spectacle frame F to the measurement reference plane M with four clamp pins arranged on the slider 202 and the slider 203. In the spectacle frame F, the upper rim and the lower rim are held at the same height by a clamp pin. Therefore, the height of the upper rim and the lower rim with respect to the measurement reference plane M is the same. That is, the spectacle frame F is arranged parallel to the measurement reference plane M without tilting forward. Thereby, the target lens shape measured by the measurement unit 5 is obtained as a measurement result in a state where the forward tilt angle θf (see FIG. 8) is 0 degrees.

  In the present embodiment, the forward tilt angle θf means, for example, an angle formed by a straight line Ln perpendicular to the far visual axis Lf of the wearer Wr and the spectacle frame F as shown in FIG.

  When the trace button 6 (see FIG. 1) is pressed by the operator, the control unit 50 activates the measurement mechanism 220. The controller 50 drives the motors 235 and 238 (see FIG. 4) to bring the tip of the measuring element 233 into contact with the inner groove of the lens frame of the glasses. Subsequently, the pulse motor 221 is rotated for each predetermined number of unit rotation pulses. By this rotation, the horizontal movement support base 227 moves horizontally according to the moving diameter of the spectacle frame together with the probe 233, and the movement is detected by the encoder 239.

  The vertical movement support base 229 moves up and down along with the warp of the spectacle frame F together with the measuring element 233, and the movement is detected by the encoder 236. The three-dimensional ball in the inner groove of the spectacle frame F is calculated from the rotation angle (radial radius) θ of the rotary base 222 by the pulse motor 221, the radial length r detected by the encoder 239, and the vertical amount z detected by the encoder 236. The type data is measured as (rn, θn, zn) (n = 1, 2,..., N).

  When the measurement of one rim is completed, the control unit 50 moves the left / right movement support base and starts measuring the other rim. Based on the measurement result of the three-dimensional shape of the right rim FR and the left rim FL and the movement information when the left / right movement support base 226 is moved by the motor 134, the control unit 50 determines the distance between the centers of the left and right target lens shapes (FPD). ), The nose side end distance (DBL) of the left and right eyeglasses, the frame warp angle (hereinafter abbreviated as the warp angle) θs of the spectacle frame F, and the like. Regarding the three-dimensional shape of the lens frame, data obtained by mirror-inversion of one of the data may be used as the other data.

  Note that the control unit 50 stores the data acquired by the target lens shape measurement unit 5 and data obtained by correcting the data in the memory 51.

  Then, in order to obtain the two-dimensional lens shape data excluding the influence of the warp angle θs of the spectacle frame F, the control unit 50 uses the three-dimensional lens shape data (rn, θn, zn) to warp the spectacle frame F as follows. The two-dimensional target lens shape projected in the direction is corrected.

  9 and 10 are diagrams illustrating a method for calculating the two-dimensional target lens shape data D2 (see FIG. 11) projected in the warping direction. The control unit 50 converts the three-dimensional target lens data (rn, θn, zn) into three-dimensional target lens data D1 (xn, yn, zn) that is orthogonal coordinate data. The two-dimensional target lens data Dxy is obtained by projecting the three-dimensional target lens data D1 onto the xy plane (two-dimensional xy plane when viewed from the front direction). In this two-dimensional target lens data, a point A (xa, ya) having a maximum value in the x-axis direction, a point B (xb, yb) having a minimum value in the x-axis direction, and a point C having a maximum value in the y-axis direction (Xc, yc), a point D (xd, yd) having a minimum value in the y-axis direction is selected, and its geometric center (boxing center) is set as the center OF1.

 A line in the x-axis direction passing through the center OF1 is defined as a datum line DL. The curvature of the spectacle frame is based on the datum line DL. For the three-dimensional target lens shape data D1 (xn, yn, zn), the nose side point (x minimum value point) and the ear side point (x maximum value point) in the x-axis direction located on the datum line DL are respectively point V1. Let (xv1, yv1, zv1) and point V2 (xv2, yv2, zv2). At this time, the angle of curvature of the spectacle frame (datum line inclination angle) θs is defined as an angle formed by the straight line Ld passing through the points V1 and V2 and the datum line DL. The direction inclined by this angle θs is taken as the new X-axis direction, the y-axis direction is used as it is as the Y-axis direction (the vertical inclination of the spectacle frame is almost negligible), and the vertical line segment connecting the points V1 and V2 The direction of the bisector is taken as a new Z direction (see FIG. 10). Then, the three-dimensional target lens data D1 (xn, yn, zn) is converted into three-dimensional shape data D1 (Xn, Yn, Zn) of the new coordinate system XYZ. By projecting this three-dimensional shape data D1 (Xn, Yn, Zn) onto the XY plane, as shown in FIG. 11, two-dimensional target lens data D2 (Xn, Yn) projected in the warping direction (datum line tilt direction). ) Is obtained. The origin of the XY coordinate system in the two-dimensional target lens data D2 at this time is the center point ODL2 on the datum line.

  Moreover, the control part 50 calculates the distance between each data of three-dimensional target lens data D1 (Xn, Yn, Zn) or three-dimensional target lens data D1 (xn, yn, zn), and adds this. The three-dimensional frame circumference value of the spectacle frame can be obtained.

  For example, as shown in FIG. 12, the warp angle θs is a spectacle frame on an angle scale in which warp angles θs of 0 °, 5 °, 10 °, 15 °, 20 °, and 25 ° are displayed as the warp angle θs. The warping angle θs may be obtained by combining F. For example, an inclination line close to a straight line connecting the nose side end portion J and the ear end portion K of the left and right rims FL and FR may be selected, and an angle corresponding to the selected inclination line may be set as the warp angle θs. The angle scale may be displayed on the touch panel 3, for example.

  Note that the cup attachment device of the present embodiment may not include the measurement unit 5. For example, it suffices if data relating to the spectacle frame F can be acquired from a storage device provided outside.

  As described above, the two-dimensional lens shape data D2 of the spectacle frame F acquired by the measurement unit 5 (hereinafter also referred to as the target lens data D2) is data when the forward tilt angle of the spectacle frame F is 0 degree. . When the wearer Wr actually wears the spectacle frame F, the spectacle lens LE tilts forward. Therefore, the two-dimensional target lens shape data D2 of the spectacle frame F acquired by the measuring unit 5 looks different from the target target target lens shape. FIG. 13 is a diagram for explaining the horizontal displacement between the target lens shape and the processed spectacle lens.

  FIG. 13A shows a target lens shape when the forward tilt angle θf of the spectacle frame F is 0 degrees. The horizontal direction of the left and right target lens shapes is indicated by a straight line Hl and a straight line Hr. FIG. 13B shows a situation when the wearer Wr wears spectacles manufactured based on the target lens shape data of FIG.

  When the eyeglasses are worn by the wearer Wr with the eyeglasses tilted forward, the eyeglass frame F looks like the temple Tp (ear hook) side is rotated upward and the bridge BL side is rotated downward. Accordingly, the directions of the straight lines H1 and Hr indicating the horizontal direction of the left and right eyeglass lenses do not coincide with the direction of the straight line Ha indicating the horizontal direction of the eye of the wearer Wr. In the present embodiment, the angle at which the target lens rotates in this way is defined as a rotation angle θr.

  That is, when processing a spectacle lens, it is preferable to consider the forward tilt angle θf of the spectacle frame F when the wearer Wr wears it.

  Next, the relationship among the warp angle θs, the forward tilt angle θf, and the rotation angle θr will be described. FIG. 14 and FIG. 15 are diagrams showing a state in which the warp angle θs and the forward tilt angle θf are added to the two-dimensional target lens data D2 and converted into three-dimensional data.

  FIG. 14A shows the two-dimensional target lens shape data D2 before adding the warp angle θs and the forward tilt angle θf. Note that the straight lines HL and HR shown in FIG. 14A are straight lines indicating the horizontal direction of the left and right two-dimensional target lens data D2 defined by the measurement unit 5.

  When the warp angle θs is added to the two-dimensional target lens data D2, it is converted into three-dimensional target lens data D3 (hereinafter also referred to as target lens data D3) as shown in FIG. When the warp angle θs is added to the two-dimensional target lens data D2 to obtain the three-dimensional target lens data D3, for example, each coordinate of the two-dimensional target lens data D2 is the position of the nose side end of the target lens or the target lens. Coordinate transformation (for example, affine transformation) is performed with respect to the XZ plane so as to rotate the warp angle θs around the position of the joint portion of the mold and the bridge BL. Affine transformation refers to, for example, transformation that combines translation and linear transformation. Linear transformation is, for example, enlarging, reducing, or rotating a figure. The target lens data after coordinate conversion rotated by the warp angle θs is defined as three-dimensional target lens data D3.

  FIG. 14C shows a target lens shape D3 ′ when the target lens shape data D3 is projected in parallel on the XY plane. As shown in FIG. 14C, the directions of the straight lines HL and HR when the target lens shape data D3 is viewed from the front direction (Z-axis direction) are not changed.

  Next, information on the forward tilt angle θf is added to the target lens shape data D3. For example, each coordinate of the target lens shape data D3 is coordinate-converted with respect to the YZ plane so as to be rotated by the forward tilt angle θf around the position of the nose side end of the target lens shape or the position of the joint portion of the target lens shape and the bridge BL (for example, , Affine transformation) is performed (see FIG. 15A). Data obtained by coordinate conversion of the target lens shape data D3 based on the forward tilt angle θf is defined as three-dimensional target lens shape data D4 (hereinafter also referred to as target lens shape data D4).

  The shape of the three-dimensional target lens data D4 when viewed from the front direction (Z-axis direction) appears to be rotated as compared with the two-dimensional target lens data D2 and the three-dimensional target lens data D3. FIG. 15B shows a figure D4 ′ when the target lens shape data D4 is projected in parallel on the XY plane. As shown in FIG. 15B, the straight lines HL and HR projected on the XY plane rotate by a rotation angle θr with respect to the straight line HA parallel to the X axis. Accordingly, the horizontal direction of the left and right target lens data defined by the measurement unit 5 is rotated by the rotation angle θr with respect to the horizontal direction of the spectacle wearer.

  FIG. 16 is a diagram showing the relationship regarding the warp angle θs and forward tilt angle θf of the eyeglass frame F and the rotational angle θr of the target lens shape. As shown in FIG. 16, the warp angle θs, the forward tilt angle θf, and the rotation angle θr have linearity. Accordingly, the relationship between the warp angle θs, the forward tilt angle θf, and the rotation angle θr is experimentally obtained by a three-dimensional simulator software or the like, whereby the relationship between the forward tilt angle θf and the rotation angle θr at the warp angle θs. Can be calculated.

  In the cup mounting device 1 of the present embodiment, there is a rotation angle setting mode for correcting the target lens shape data D2 acquired by the measurement unit 5 in accordance with the wearing state of the wearer Wr. The rotation angle setting mode will be described below with reference to the drawings.

  FIG. 17 is a diagram for explaining the configuration of the rotation angle setting screen 20 displayed on the display unit (touch panel) in the rotation angle setting mode. The rotation angle setting screen 20 is assigned a display area 20A on the right side, a display area 20B on the center, and a display area 20C on the left side.

  A display field 21 and an enter button 26 are mainly displayed in the display area 20A. The display column 21 is divided into display columns 21a, 21b, and 21c. The display column 21a displays the warp angle θs of the eyeglass frame F, the display column 21b displays the forward tilt angle θf, and the display column 21c displays the numerical value of the target lens rotation angle θr.

  In the display area 20B, a front image 22 of the wearer Wr wearing the spectacle frame F photographed by the photographing apparatus 600 is displayed. In the display area 20 </ b> B, a target lens shape (target image) 23 representing the target lens shape of the spectacle frame F is superimposed on the front image 22. The target lens shape 23 is a pair of left and right target lens shapes of the spectacle frame F.

  As illustrated in FIG. 17, the control unit 50 displays a target lens shape as a target lens shape 23 when at least a part of the spectacle frame F is viewed from the front direction.

  In the display area 20C, a side image 24 imitating the profile of the wearer Wr is displayed. In the side image 24, a line H1 indicating the horizontal direction and V1 indicating the vertical direction are displayed. In addition, a lateral target figure 25 is displayed in the display area 20C. The side lens shape figure 25 is a shape when the target lens shape is viewed from the side (left and right direction of the wearer Wr).

  As illustrated in FIG. 17, in addition to the front image 23, the control unit 50 further displays a side lens shape 25 when at least a part of the spectacle frame F is viewed from the side surface direction.

  In the display area 20C, a photograph of the profile of the wearer Wr may be displayed. In this case, the photographing apparatus 600 may be provided with a camera on the side of the wearer Wr, and when the front image 22 of the wearer Wr is photographed, a side image may also be photographed. Of course, the photographing apparatus 600 may photograph the face of the wearer Wr facing to the side with an imaging means (for example, the digital camera 604) for photographing the front image 22 without having a camera on the side. It is not necessary to photograph with the photographing device 600, and the controller 50 of the cup mounting device 1 may receive an image photographed with an external camera.

  As described above, the imaging device 600 functions as an imaging optical system that captures a wearing image that is at least one of the front image 22 and the side image 24 of the wearer Wr including the spectacle frame F, for example. And a display control means (for example, control part 50) displays a wearing picture photoed with an imaging optical system (for example, photographing device 600) on a display part (for example, panel 3).

  The control unit 50 can display the display areas 20A, 20B, and 20C in conjunction with each other. For example, the control unit 50 switches the display of the display areas 20A, 20B, and 20C in conjunction with the warp angle θs, the forward tilt angle θf, and the target lens rotation angle θr of the spectacle frame F.

  Hereinafter, the operation procedure of the cup mounting device 1 according to this embodiment equipped with the rotation angle setting mode and the operation of the device will be described. The rotation angle setting mode is a mode for determining the rotation angle θr of the target lens shape from the apparent target lens shape of the spectacle frame F worn by the wearer Wr and setting the cup mounting position based on the calculated rotation angle θr. . In the present embodiment, the rotation angle θrt when the target lens shape 23 is matched with the front image 22 of the wearer Wr is obtained, and the attachment angle of the cup is set. The control unit 50 includes a processor (for example, a CPU) that performs various control processes, and a storage medium that stores a spectacle parameter calculation program. The processor executes processing described below based on the control flowchart shown in FIG. 18 in accordance with the eyeglass parameter calculation program.

  In the following description, as an example, a case will be described in which a pair of glasses with a warp angle θs of 20 ° and a forward tilt angle θf of 20 ° during wearing is manufactured. In the following description, it is assumed that the spectacle lens to which the cup is attached is a single-focus lens, and a marking point that defines the optical center and the horizontal direction (reference direction of the astigmatism axis) is given by a marking point device (not shown). .

  First, the operator sets the spectacle frame F on the measurement unit 5 (see FIG. 1) and presses the trace button 6. When the trace button 6 is pressed, the control unit 50 starts measurement of the set spectacle frame F by the measurement unit 5. The control unit 50 acquires the three-dimensional target lens data D1, the two-dimensional target lens data D2, the warp angle θs, etc., and stores the result in the memory 51 by the method described above. In this way, the control unit 50 acquires the target lens shape data and the warp angle θs (step 1).

  When the tracing of the spectacle frame F is completed, the operator presses the mode selection button 500a (see FIG. 1) displayed on the initial screen of the panel 3. When the button 500a is pressed, the mode is set to a blocking mode, and a layout input screen for inputting layout data according to various lens types is displayed.

  In this case, the operator uses the lens type selection key 501a displayed on the screen of the touch panel 3 (see FIG. 7) to select the single dot lens marking mode. The panel 3 displays a screen on which the target lens data and the layout data of the single focus lens can be input. The operator operates the panel 3 to call the target lens data D2 stored in the memory 51 and display it on the screen.

  The operator can input layout data, such as the height of the optical center LO with respect to the geometric center FC of the target lens shape by FPD (distance between frame centers), PD (distance between pupils), and the switch key displayed on the panel 3. it can. When the lens LE has astigmatism power, the astigmatic axis angle data (AXIS) prescribed for the wearer Wr is input. Also, with this screen, the mode of the attachment position of the cup Cu with respect to the lens LE is set to the optical center mode (optical center), the frame center mode (geometric geometric center), or the arbitrary mode (arbitrary position). Can be set. In addition, processing conditions to be performed by an eyeglass lens processing apparatus (not shown) can be input from the touch panel 3.

<Rotation angle setting mode>
When the input of layout data or the like is completed, the mode selection button 500a is operated to select the rotation angle setting mode. By the operation of the operator, the control unit 50 switches the operation mode from the blocking mode to the rotation angle setting mode. And the control part 50 displays the rotation angle setting screen 20 on the touch panel 3 (refer FIG. 17). The mode switching described above is not limited to switching by an operator input. For example, the control unit 50 may determine whether correction of the target lens shape in the horizontal direction in the rotation angle setting mode is necessary based on the magnitude of the warp angle θs, and may automatically switch the operation mode.

  Hereinafter, the rotation angle setting mode will be described. First, the operator instructs the wearer Wr to wear the spectacle frame F. The wearer Wr wears the spectacle frame F. Then, the front image 22 of the face of the wearer Wr wearing the spectacle frame F is photographed by the digital camera 604 of the wearer photographing apparatus 600. Note that the image is not limited to the front image 22 but may be a moving image of the wearer Wr taken from the front. Instead of the digital camera 604, an analog photograph or the like may be scanned and captured as data.

  The front image 22 of the wearer Wr photographed by the digital camera 604 is stored in the memory 606. The control unit 50 acquires the front image 22 of the wearer Wr stored in the memory 606 and stores it in the memory 51. Note that an image taken by the digital camera 604 may be directly stored in the memory 51. The control unit 50 or the memory 51 functions as an image acquisition unit for acquiring the front image data of the wearer Wr, and acquires the front image 22 of the wearer Wr (step 2).

  The control unit 50 displays the front image 22 of the wearer Wr stored in the memory 51 in the display area 20B of the rotation angle setting screen 20 (step 3).

  Next, the control unit 50 displays the numerical value of the warp angle θs acquired by the measurement unit 5 in the display field 21a of the display area 20A (step 4).

  Subsequently, the control unit 50 corrects the two-dimensional target lens data D2 stored in the memory 51 on the basis of the warp angle θs and converts it into three-dimensional target lens data D3. Then, the shape of the three-dimensional lens shape data D3 (lens shape figure 23) is superimposed and displayed on the front image 22 displayed in the display area 20B (step 5). At this time, since the forward tilt angle θf and the rotation angle θr of the target lens shape 23 are 0 °, the control unit 50 displays “0 °” in the display columns 21b and 21c, respectively.

  In step 5, when the three-dimensional target lens data D3 is displayed on the front image 22, the control unit 50 preferably displays the target target lens shape when the wearer Wr of the spectacle frame F is viewed from the front. This makes it easy for the operator to compare the shape of the frame image 22a and the target lens shape 23. In the present embodiment, the control unit 50 projects the three-dimensional target lens data onto the two-dimensional target lens data by the perspective projection method, and displays it on the display area 20B of the display unit (for example, the touch panel 3).

  The perspective projection method will be described with reference to FIG. FIG. 19 is a diagram for explaining the perspective projection method. FIG. 19A is a diagram illustrating a state in which, for example, the three-dimensional target lens data D3 illustrated in FIG. 14B is projected onto the XY plane with respect to the viewpoint P. FIG. 19B shows the target lens shape data projected on the XY plane.

  The perspective projection method is, for example, a method of projecting three-dimensional orthogonal coordinate data (xn, yn, zn) around a certain viewpoint P. When the orthogonal coordinate data T (x1, y1, z1) in the target lens shape data D3 is projected onto a certain plane Z = d, the straight line connecting the viewpoint P and the orthogonal coordinate data T (x1, y1, z1) is the plane Z = d. It is converted to the intersecting point T ′ (x2, y2, d). As the perspective projection method, for example, a method disclosed in JP-A-2006-288495 can be used.

  By using the perspective projection method, an object close to the viewpoint P is displayed large, and an object far from the viewpoint P is displayed small. For example, when the perspective projection method is used for the three-dimensional target lens data D3 shown in FIG. 14B, the inner part of the spectacle frame F is displayed larger than the outer part. In this way, by giving perspective to a two-dimensional image, it is possible to display a target lens shape similar to the actual appearance on the screen.

  That is, the shape of the frame image 22 a of the front image 22 and the shape of the target lens shape 23 superimposed and displayed on the front image 22 can be more approximated. This makes it easy to match the shape of the target lens shape 23 superimposed on the shape of the frame image 22a.

  The method for displaying the three-dimensional target lens data on the panel 3 is not limited to the perspective projection method. For example, a known parallel projection method may be used, and the target figure 23 can be displayed by another known image processing method.

  When the target lens shape data D2 is corrected and displayed based on the warp angle θs, in this embodiment, the correction is performed in a state where the nose side end distance (DBL) of the left and right target lens is kept constant. The nose side end distance (DBL) of the left and right target is measured by the measurement unit 5.

  Note that the target lens shape 23 is not necessarily displayed on the front image 22 data. The control unit 50 may display the target figure 23 in a display area different from the display area 20B. Then, the operator may adjust the shape of the target lens shape 23 in comparison with the frame image 22a in the front image 22 displayed in the display area 20B.

  Next, the control part 50 displays the side target figure 25 on the display area C on the side image 24 displayed on the display area C (step 6).

  When the side lens figure 25 is displayed on the display area 20C, it is preferable to display the apparent lens shape when the eyeglass frame F is viewed from the side. This makes it easy to imagine how much the target lens is tilted (rotated) in an actual wearing state. Therefore, similarly to step 4, the three-dimensional target lens data D3 is projected onto the two-dimensional target lens data by the perspective projection method and displayed on the display area 20C.

  FIG. 20 is a diagram for explaining a method of projecting a shape when viewing the three-dimensional target lens data from the side onto a two-dimensional plane. FIG. 20A is a diagram showing a state in which the three-dimensional target lens data D3 shown in FIG. FIG. 20B is a diagram illustrating target lens shape data projected on the YZ plane.

  Similar to when the three-dimensional target lens data D3 is projected onto the XY plane, for example, the viewpoint Q is projected onto the YZ plane. Accordingly, as shown in FIG. 20B, in the two-dimensional target lens data projected on the YZ plane, the inner portion near the bridge BL of the spectacle frame F appears to be small, and the outer portion far from the bridge BL appears to be large.

  The control unit 50 displays the target lens shape data projected on the YZ plane by the perspective projection method in the display area C. Thus, when the target lens shape data is displayed in the display area C, a sense of perspective as if the target lens shape of the spectacle frame F is actually viewed from the side can be obtained, and the image when the spectacles are worn can be easily grasped.

  In the display area 20C, a line H1 indicating the horizontal direction and a line V1 indicating the vertical direction are displayed. When the target lens shape data D3 viewed from the side is displayed in the display area 20C, the horizontal direction and the vertical direction in the YZ plane of FIG. 20B are displayed so as to coincide with the direction of the line H1 and the direction of the line V1. Good. Step 5 and step 6 may be performed simultaneously. In the description of the present embodiment, the simultaneous means does not necessarily mean an exact time match, and some time lag is not considered.

  Subsequently, the operator brings the target lens shape 23 closer to the frame image 22a. By approaching both images, it becomes easier to compare the shapes of the target lens shape 23 and the frame image 22a. The operator touches the target figure 23 displayed on the panel 3 with a finger and performs a drag operation in the direction of the frame image 22a. The control unit 50 receives the operation signal from the panel 3 and moves the target figure 23 in the direction of the frame image 22a to be displayed (step 7).

  When the target lens shape 23 is displayed near the frame image 22a, the operator operates to change the display size of the target lens shape 23 displayed on the display screen. Then, in the front image 22, the size of the target lens shape of the frame image 22a worn by the wearer Wr and the size of the target lens shape 22 are substantially matched. FIG. 21 is a diagram for explaining a method for changing the display size of the target figure 23. FIG. 21A shows a state before the display size of the target lens shape 23 is changed. FIG. 21B shows a state when the display size of the target lens shape 23 is changed.

  As shown in FIG. 21A, the target figure 23 displayed on the touch panel 3 is touched with two fingers and dragged to widen the distance between the two fingers. When the control unit 50 receives the operation signal from the touch panel 3, it enlarges the magnification of the target figure 23 as shown in FIG. On the contrary, when the drag is performed so as to reduce the interval between the two fingers, the control unit 50 reduces the magnification of the target lens 23 and displays the reduced size. In this way, the control unit 50 changes the size of the target figure 23 and displays it (Step 8).

  In addition, the control part 50 is displayed so that the ratio of the magnitude | size of a target lens figure and the space | interval (DBL) of a left target lens figure may become the same, when expanding and reducing the target lens figure 23. FIG. As shown in FIG. 21B, the operator may change the display size of the target lens shape 23 so that the distance between target lens shapes of the frame image 22a and the target lens shape of the target lens shape 23 become equal. As a result, the sizes of the frame image 22a and the target lens shape 23 are substantially the same. This is because the ratio between the size of the target lens shape and the distance between the target lens shapes matches between the frame image 22a and the target lens shape figure 23.

  The operation method for changing the magnification of the target figure 23 displayed on the touch panel 3 is not limited to the above description. For example, a numeric keypad (not shown) may be displayed on the panel 3, and a numerical value of magnification may be input.

  When the shooting magnification of the front image 22 can be acquired, such as when using the wearer shooting apparatus 600 as described above, the control unit 50 sets the magnification of the target figure 23 in accordance with the shooting magnification of the front image 22. May be.

  When the size of the target lens shape 23 is adjusted, the operator rotates and displays the target lens shape 23 so that the shape of the frame image 22a matches the shape of the frame image 22a. Hereinafter, the rotation angle setting screen 20 and the display method when the target lens shape 23 is rotated from 0 ° to 0.25 ° will be described with reference to the drawings. In the present embodiment, it is assumed that the target lens shape 23 can be rotated and displayed at a rotation angle of 0.25 °, for example. Of course, it may be possible to rotate the display every several degrees.

  FIG. 22 is a diagram for explaining an operation method for rotating and displaying a target lens figure. FIG. 22A shows a state before the target lens shape data is rotated. FIG. 22B shows a state where the left target figure 23L is rotated to the left as an example.

  As shown in FIG. 22A, the operator touches the left target figure 23L with two fingers. Then, the operator drags the two fingers to rotate counterclockwise (in the direction in which they want to rotate) the target lens data.

  When the above operation is performed, the control unit 50 receives an operation signal (referred to as a first operation signal) for rotating and displaying the target lens shape 23L for the left eye counterclockwise by a rotation angle of 1 °. Thus, the control unit 50 receives an operation signal from the operator for the target lens shape 23 (step 9a).

  When receiving the first operation signal, the control unit 50 switches the display of the rotation angle θr in the display field 20c from “0 °” to “0.25 °”. Then, the forward tilt angle θf when the rotation angle θr changes from 0 ° to 0.25 ° is obtained.

  An example of how to obtain the forward tilt angle θf from the rotation angle θr will be described below. The warp angle θs, the forward tilt angle θf, and the rotation angle θs have linearity as shown in FIG. 16, for example. Therefore, if two of the three angles θs, θf, and θr are known, another angle can be obtained.

  For example, the relationship among the warp angle θs, the forward tilt angle θf, and the rotation angle θr obtained experimentally by three-dimensional simulation software is stored in a memory as a function table. For example, if the warp angle θs is 20 ° and the rotation angle θr is 0.25 °, for example, the control unit 50 can determine from the function table that the forward tilt angle θf is 0.7 °. .

  Of course, the controller 50 may obtain the forward tilt angle θf or the rotation angle θs by calculating from the relational expressions of the warp angle θs, the forward tilt angle θf, and the rotation angle θs without using the function table.

  Subsequently, the control unit 50 corrects and displays the shape of the target lens figure 23 to be rotated based on the warp angle θs and the forward tilt angle θf obtained from the function table (step 10).

  The control unit 50 first performs coordinate transformation (for example, affine transformation) on the YZ plane of the three-dimensional target lens data D3 with the warp angle θs displayed on the panel 3 in consideration of the forward tilt angle θf. In the present embodiment, for example, affine transformation is performed around the nose side end point of the target lens shape. Of course, it does not have to be the point on the nose side end. For example, it may be the center point of the bridge BL, or a contact point between the target lens shape and the bridge.

  The control unit 50 projects the three-dimensional target lens shape data D4 subjected to affine transformation according to θf onto the XY plane by the perspective projection method described with reference to FIG. The target lens shape data D5 projected onto the XY plane by the perspective projection method is projected into a shape that provides the same perspective as when the eyeglass frame F with the warp angle θs is tilted forward.

  The control unit 50 changes the shape of the target lens shape 23 displayed in the display area 20B before receiving the first operation signal to the shape of target lens data D5 projected on the XY plane, and displays it. Thus, the control unit 50 can display the shape of the target lens shape when the spectacle frame F is tilted forward by, for example, 0.7 °.

  In this way, the control unit 50 converts the two-dimensional target lens data D2 forming the target target lens shape 23 into the three-dimensional target lens data D4 based on the warp angle θs and the forward tilt angle θr. Then, for example, by the perspective projection method described above, the depth direction (for example, the direction of the far vision axis Lf (see FIG. 8)) with respect to the target lens data for each radial angle (or each coordinate) in the three-dimensional target lens data D4. The target lens shape 23 deformed in accordance with the position of is displayed.

  Further, when rotating the left target figure 23L counterclockwise, the control unit 50 simultaneously displays the right target figure 23R rotated clockwise by the same rotation angle of 0.25 °. This eliminates the need to rotate the left and right separately, and shortens the operation time.

  Further, the control unit 50 switches the display of the display area 20C at the same time as the display switching of the display area 20B. The control unit 50 calculates the shape of the three-dimensional target lens data D4 that has been subjected to affine transformation according to the forward tilt angle θf and projected onto the YZ plane by the perspective projection method as described with reference to FIG. The target lens shape data D6 projected onto the YZ plane has a shape that provides the same perspective as when the eyeglass frame F with the warp angle θs is tilted forward is actually viewed from the side.

  The control unit 50 changes the shape of the side lens shape figure 25 displayed in the display area 20C before receiving the first operation signal to the shape of the target lens shape data D6 projected on the YZ plane and displays it. Thereby, the control part 50 can display the shape when the eyeglass frame F is viewed from the side when the spectacle frame F is tilted forward.

  The control unit 50 switches the display of the display area 20A, the display area 20B, and the display area 20C in conjunction with each other. That is, the control unit 50 switches the display of the target lens shape, the warp angle θs, the forward tilt angle θs, the rotation angle θs, and the like in conjunction with each other. Thereby, for example, the operator can switch the display of the other display areas 20A, 20B, and 20C only by changing any of the display areas 20A, 20B, and 20C by an input from a touch panel or the like.

  The operator drags the target lens shape 23 with two fingers to rotate until the shape of the frame image 22a and the target lens shape 23 match. While the drag operation continues, the control unit 50 receives the first operation signal (instruction signal) and repeats the display control in step 9 to rotate the target figure 23 every 0.25 °. And based on rotation angle (theta) r to rotate, the control part 50 calculates | requires the forward inclination angle (theta) f, changes the display of the display columns 21b and 21c, and changes and displays the shape of the target lens figure 23. FIG.

  As described above, the control unit 50 corrects the target lens figure 23 based on the warp angle θs and the forward tilt angle θf of the eyeglass frame F during wearing, and displays the corrected target lens figure 23 on the display unit (for example, the panel 3) and so on.

  Further, as described above, the eyeglass parameter calculation device 1 according to the present embodiment uses the wearing image (the front image 22 or the side image 24) displayed on the display unit (for example, the touch panel 3) in front of the eyeglass frame F. A forward tilt angle receiving unit (for example, the control unit 50) that receives an instruction from the operator for obtaining the tilt angle θf is provided, and the display control unit (for example, the control unit 50, for example) includes a forward tilt angle receiving unit (for example, the control unit 50). For example, the forward tilt angle θf of the spectacle frame F is acquired in accordance with an instruction received by the control unit 50 or the like.

  When the controller 50 changes the shape of the target figure 23 and displays it, the operator may rotate the target figure 23 so as to match the frame image 22a. Thereby, the reference direction (horizontal direction) of the astigmatic axis of the target lens in the wearing state can be easily set.

  Further, the rotation angle θr of the target lens shape can be set according to the target lens shape when the spectacles worn by the wearer Wr are viewed from the front. Thereby, when the spectacle lens LE is worn, it is possible to reduce the deviation of the astigmatic axis direction of the spectacle lens from the astigmatic axis direction of the eye of the wearer Wr.

  When the shape of the frame image 22 a matches the shape of the target lens shape 23, the operator stops the drag operation and releases the finger from the target lens shape 23. In the display columns 21b and 21c, the forward tilt angle θf and the rotation angle θr in a state where the frame image 22a and the target lens shape 23 coincide with each other are displayed. The rotation angle at this time is defined as a rotation angle θrt. In the description of the present embodiment, for example, it is assumed that the frame image 22a and the target lens shape 23 coincide when the forward tilt angle θf is 20 ° and the rotation angle θrt is 7 °. In this case, the forward tilt angle θf displayed in the display column 21b is displayed as “20 °”, and the rotation angle θrt displayed in the display column 21c is displayed as “7 °”.

  Subsequently, the operator presses the enter button 26 displayed on the panel 3. As a result, the control unit 50 receives a second operation signal for setting a position where the cup is attached using the rotation angle θrt in a state where the frame image 22a and the target lens shape 23 match.

  When receiving the second operation signal, the controller 50 attaches the cup in a state where the horizontal direction of the cup Cu is rotated by the rotation angle θrt with respect to the reference direction (horizontal direction) of the astigmatic axis defined by the mark point. A numerical value of the rotation angle θrt is set (step 11). As described in the present embodiment, the control unit 50 may only provide information on the rotation angle θr and the forward tilt angle θf without setting the numerical value of the rotation angle θrt.

  As described above, by adjusting the target lens shape 23 in the rotational angle setting mode, the rotational angle θrt of the spectacle lens in the wearing state rotates with respect to the target lens data D2 measured by the measurement unit 5. Can be requested. Then, the control unit 50 attaches the cup Cu to the lens LE using the obtained rotation angle θrt (step 12). Accordingly, the spectacle lens LE can be processed in a state where the wearing state of the spectacles is taken into consideration.

  Hereinafter, the cup attaching operation will be described. FIG. 23 is a diagram illustrating an example of a display screen displayed on the panel 3 during blocking. The panel 3 displays a lens image taken from above. When the lens LE is placed on the support pin 120, the lens LE is illuminated from below by the illumination light reflected by the retroreflecting member 20, and the lens image is captured by the image sensor 33. At this time, the image sensor 33 also captures three mark image M100a, M100b, and M100c attached to the surface of the lens LE. The mark point attached to the surface of the lens LE is detected with high accuracy by the imaging device 33 focused on the lens surface in the vicinity of the lens surface. A center mark image M100a at the center is an image of a mark added to the optical center of the lens LE by a lens meter. The control unit 50 performs image processing on the lens image LEs to extract the mark mark images M100a, M100b, and M100c, and obtains the coordinate position of the center of each mark image.

  When the center of the mark image M100a at the mark point attached to the optical center is detected, in the optical center mode, the position of the arm 310 is adjusted so that the center of the cup Cu is positioned at the center of the mark image M100a. Further, the astigmatic axis angle is detected based on the mark mark images M100b and M100c on both sides, and the mounting portion 320 is rotated around the central axis S1 based on the astigmatic axis angle and the rotation angle θrt. Thereafter, the Z-axis direction moving mechanism 304 is driven and the arm 310 is lowered, whereby the cup Cu is fixed to the surface of the lens LE.

  On the screen of the panel 3, as shown in FIG. 23A, the lens image LEs imaged by the imaging element 33 of the imaging optical system 30 is displayed and the target lens data D2 is synthesized and displayed. At this time, the display size and display position of the lens shape data D2 are the detection result of the optical center LO, the lens shape data, the layout data, the positional relationship of the optical axis of the imaging optical system 30 with respect to the optical axis of the light receiving optical system 15, and the imaging optics. It is determined by the imaging magnification of the system 30 and the like.

  When the target lens data D2 and the lens image LEs are combined and displayed on the display of the panel 3, first, the optical axis position of the light receiving optical system 15 and the optical axis position of the imaging optical system on the display screen are matched, The display size of the deviation position of the optical center LO with respect to the position of the optical axis L1 is matched with the display size of the lens image. Regarding the display position of the target lens shape data D2, the relationship between the optical center LO and the geometric center FC is determined by the layout data. Further, when the lens LE has an astigmatism power, the relationship between the detection result in the reference direction (horizontal direction) of the astigmatism axis and the rotation angle θrt set in the rotation angle setting mode, The tilt angle is determined. That is, the control unit 50 displays the cup by rotating the horizontal direction of the cup by the rotation angle θrt with respect to the reference direction of the astigmatic axis defined by the mark point.

  If the diameter of the lens LE is sufficient, the operation moves to a cup blocking operation. When the block switch 2 is pressed, in the frame center mode, the controller 50 positions the center axis S1 of the cup Cu at the position of the geometric center FC of the target lens shape determined based on the optical center of the lens LE and the layout data. To do. At this time, the Y-axis direction moving mechanism 302 and the X-axis direction moving mechanism 306 are driven to move the arm 310. When the lens LE has astigmatism power, the control unit 50 rotates the horizontal direction of the cup Cu by the rotation angle θrt with respect to the reference direction (horizontal direction) of the astigmatic axis detected by the mark point ( The mounting portion 320 is rotated about the central axis S1. Thereby, the cup attachment device 1 can attach the cup Cu to the lens LE in a state where the reference direction (horizontal direction) of the astigmatic axis of the lens LE and the horizontal direction of the cup Cu are rotated (shifted) by the rotation angle θrt. it can.

  When the position adjustment of the center of the cup Cu and the adjustment of the reference direction of the astigmatism axis are completed, the Z-axis direction moving mechanism 304 is driven and the arm 310 is lowered. As a result, the center of the cup Cu is blocked on the lens surface so as to coincide with the geometric center FC of the target lens shape. In the optical center mode, the position of the arm 310 is adjusted so that the center of the cup Cu is positioned at the optical center LO of the lens LE. The cup attachment mechanism may be a mechanism in which a mechanism for holding the lens LE is relatively moved instead of the cup Cu being moved.

  As described above, the controller 50 allows the cup Cu to be attached to the lens LE in a state where the reference direction (horizontal direction) of the astigmatic axis of the lens LE and the horizontal direction of the cup Cu are rotated by the rotation angle θrt. Calculate the mounting angle.

  As described above, the control unit 50 may function as an attachment angle calculation unit that calculates the attachment angle of the cup Cu based on the obtained rotation angle θr.

  The lens LE to which the cup Cu is attached is processed by a spectacle lens processing apparatus that processes spectacle lenses. At this time, for example, a spectacle lens processing apparatus (not shown) processes the spectacle lens based on the horizontal direction of the cup Cu.

  The spectacle lens LE processed in this way is in a state in which the astigmatic axis is rotated by the rotation angle θrt as the cup Cu is rotated by the rotation angle θrt.

  Accordingly, the horizontal direction of the target lens and the horizontal direction of the spectacle lens (reference direction of the astigmatism axis) are rotated by the rotational angle θrt of the target lens when wearing spectacles set in the rotational angle setting mode. Accordingly, it is possible to prevent the direction of the astigmatism axis from being deviated due to the rotation of the target lens when the eyeglass with the warp angle is tilted forward.

  In the above description, the position of the cup Cu is adjusted by moving the cup Cu mounted on the mounting portion 320 by the cup mounting mechanism 300 with respect to the lens LE placed on the lens support pin 120 which is a lens support member. However, the position of the cup may be adjusted by moving the support mechanism that relatively supports the lens LE. Further, instead of moving the lens support mechanism or the cup attachment mechanism 300, as described in JP 2000-79545 A, in addition to the detection information of the optical center and astigmatic axis angle of the lens in the single focus lens, The configuration may be such that the rotational angle θr of the target lens shape is displayed on the display of the panel 3, and the lens is manually moved to adjust the position of the cup.

  In the present embodiment, the horizontal reference direction of the cup Cu is rotated with respect to the horizontal reference direction of the lens LE using the obtained rotation angle θrt. However, the present invention is not limited to this. For example, as shown in FIG. 23B, the cup Cu is attached to the lens LE without rotating the cup Cu horizontal reference direction with respect to the horizontal reference direction of the lens LE. Then, the obtained rotation angle θrt of the target lens shape is transmitted to a lens processing apparatus (not shown). The lens processing apparatus processes the spectacle lens by rotating the target lens by the received rotation angle θrt. By doing so, the horizontal direction of the processed spectacle lens is also rotated. This also can reduce the deviation of the direction of the astigmatism axis.

  Note that the rotation angle setting mode in the eyeglass parameter calculation device (for example, the cup mounting device) of the present embodiment can determine the rotation angle θrt of the target lens shape by an operation method different from that described above.

  For example, the rotation angle θrt of the target lens shape may be set by changing the forward tilt angle θf by an operation on the side target lens shape 25 displayed in the display area 20C. In this case, the operator touches the side target figure 25 displayed in the display area 20C with two fingers and rotates the side target figure 25 in a direction in which the side target figure 25 is tilted forward (for example, leftward). Drag. The control unit 50 receives an operation signal for the side lens figure 25 (step 9b) and causes the side lens figure 25 to be tilted forward and displayed.

  At this time, for example, the image display of the display areas 20A, 20B, and 20C may be switched every time the forward tilt angle θf is switched by 1 °. For example, the shape of the target lens shape 23, the shape of the side target lens shape 25, and the numerical value display in the display field 21 may be switched.

  The operator performs a drag operation with two fingers while confirming the forward tilt state of the side lens figure 25, and when the side lens figure 25 is displayed with a moderately forward tilt, the panel 3 Release your finger to finish the operation. The control unit 50 may obtain the rotation angle θr of the target lens shape 23 from the forward tilt angle θf and the warp angle θs of the lateral target lens shape 25 at this time.

  As described above, the control unit 50 may function as a rotation angle calculation unit that calculates the rotation angle θr for rotating the target lens shape 23 based on the warp angle and the forward tilt angle θf during wearing. As a method for calculating the rotation angle θr, the above method may be used.

  And the control part 50 which functions as a display control means may rotate and display the target lens figure 23 based on the rotation angle θr calculated by the rotation angle calculation means.

  As described above, the operator may obtain the target lens rotation angle θrt by confirming the forward tilt state of the lateral target lens shape 25 in the display area 20C. As a result, when the spectacle frame F is in the forward tilt state or the degree of the forward tilt angle θf, the operator can obtain the target lens rotation angle θrt with a simple operation.

  Further, as one of operation methods having different rotation angle setting modes, for example, there is a method of inputting an appropriate forward tilt angle θf or rotation angle θr in the display fields 21b and 21c of the display area 20A. For example, the operator touches the display field for the user to input a numerical value out of the forward tilt angle θf or the rotation angle θr. Then, a numeric keypad (not shown) is displayed. The operator inputs a numerical value by operating the numeric keypad. Then, the image of the display areas 20B and 20C is corrected by the control unit 50 based on the input rotation angle θf or rotation angle θr, and the display of the target lens shape 23 and the lateral target lens shape graphic 25 is switched. The operator confirms the shape of the target lens figure 23 or the side target lens figure 25 whose display has been switched, and continues to input a numerical value in the display field 21b or 21c until a suitable shape is obtained. By repeating this, the rotation angle θrt of the target lens shape can be set. The control unit 50 receives an operation signal to the display column 21 (step 9c), corrects the target lens figure 23, and displays it.

  Thus, if the numerical value of the forward tilt angle θf or the rotation angle θr can be predicted to some extent, it is possible to input only a simple numerical value.

  In addition, the cup attachment apparatus of this embodiment displays the front image 22 of the wearer Wr photographed by the wearing state photographing apparatus 600 on the panel 3, and displays the target lens figure 23 superimposed thereon. And although it demonstrated as what adjusts the shape of the target lens figure 23 by matching the shape of the target lens figure 23 with the shape of the frame image 22a of the front image 22, it is not restricted to this.

  For example, the cup mounting device may not include the wearing state photographing device 600 and may display only the target lens shape 23 on the panel 3 without displaying the front image 22. In such a case, for example, the operator sits the wearer Wr wearing the spectacle frame F beside the apparatus. Then, the shape of the lens shape of the spectacle frame F worn by the wearer Wr may be observed, and the shape of the target lens shape 23 displayed on the panel 3 may be adjusted to match the shape.

  In this way, the configuration of the wearing state imaging device 600 can be omitted, and the overall configuration of the cup mounting device 1 can be simplified. Furthermore, the trouble of photographing the wearer Wr by the wearing state photographing device 600 can be saved, and the time for attaching the cup Cu to the spectacle lens LE can be shortened.

  As another method of not displaying the front image 22, for example, the shape data of the spectacle frame F viewed from the front direction may be displayed on the panel 3. In addition, when displaying the shape data of the spectacles frame F, it is good to display in the forward tilt state at the time of wearing. For example, the shape of the eyeglass frame F in a state where the temple is positioned in the horizontal direction or a state where the temple is tilted slightly forward from the horizontal direction may be displayed. Then, the operator may adjust the shape of the target figure 23 in accordance with the shape of the displayed spectacle frame F.

  The shape data of the spectacle frame F may be obtained from design data of the spectacle frame F, for example. The design data of the spectacle frame F may be obtained from an external storage device.

  In addition, in the above description, although the spectacles parameter calculating apparatus was demonstrated as the cup attachment apparatus 1, it is not restricted to this. For example, a marking device having the rotation angle setting mode as described above may be used. The marking device is, for example, a device including a marking member for applying a marking point to the spectacle lens to at least define the optical center of the spectacle lens or the reference direction of the astigmatic axis.

  When the rotation angle setting mode is mounted in the marking device, the control unit of the marking device may determine the direction in which the marking is performed using the rotation angle θrt of the target lens shape obtained in the rotation angle setting mode. . Further, the rotation amount of the lens with respect to the marking device may be determined. In addition, the marking device includes a rotation angle calculation means (for example, a control unit of the marking device), and applies a marking to the marking member based on the rotation angle θr of the target lens obtained by the rotation angle calculation means. The angle at which the spectacle lens to be pointed is rotated may be output.

  As described above, the control unit of the marking apparatus calculates the marking point position for calculating the position of the marking point to be applied to the spectacle lens based on the rotation angle θrt obtained by the rotation angle calculation means (for example, the control unit 50). It may function as a calculation means.

  The spectacle parameter calculation device may be a spectacle lens processing device for processing a spectacle lens into a lens shape of the spectacle frame F. In this case, for example, the control unit of the spectacle lens processing apparatus rotates the target figure (or target lens data) displayed on the display unit or the like based on the warp angle and the forward tilt angle of the spectacle frame F during wearing. You may function as a rotation angle calculation means which calculates the rotation angle for making it.

  When the rotation angle setting mode is installed in the spectacle lens processing apparatus, the control unit of the spectacle lens processing apparatus sets the processing direction of the spectacle lens using the rotation angle θrt of the target lens shape obtained in the rotation angle setting mode. May be. For example, when the eyeglass lens is chucked, the eyeglass lens may be chucked after being rotated by the rotation angle θrt in advance.

  Further, for example, the target lens shape data used for processing the spectacle lens may be rotated by an angle θrt. As described above, a processing control unit (for example, the control unit 50) for controlling a processing operation when processing the spectacle lens LE based on the obtained rotation angle θs may be further provided.

  In the rotation angle setting mode, the control unit 50 may detect the frame image 22a from the front image 22. Then, the control unit 50 may change the display magnification, the display position, the forward tilt angle θf, the rotation angle θr, and the like of the target lens shape 23 so as to coincide with the detected frame image 22a. As a result, the operator can save the trouble of adjusting the target lens shape 23 to match the frame image 22a in order to obtain the rotation angle θrt, and the operation time can be shortened.

DESCRIPTION OF SYMBOLS 1 Cup mounting apparatus 3 Touch panel 5 Oval shape measurement unit 20 Rotation angle setting screen 21 Display field 22 Front image 22a Frame image 23 Oval figure 24 Side image 25 Side oval figure 600 Wearer photographing apparatus

Claims (10)

A spectacle parameter calculation device for calculating spectacle parameters for manufacturing spectacles,
Display control means for correcting a target lens figure representing a target lens shape based on a warp angle and a forward tilt angle of the eyeglass frame during wearing, and displaying the corrected target lens figure on a display unit. Eyeglass parameter calculation device. A rotation angle calculation means for calculating a rotation angle for rotating the target figure displayed on the display unit based on the warp angle and the forward tilt angle at the time of wearing,
2. The eyeglass parameter calculation according to claim 1, wherein the display control unit rotates and displays the target figure displayed on the display unit based on the rotation angle calculated by the rotation angle calculation unit. apparatus.   The display control means converts the two-dimensional shape data forming the target shape figure into three-dimensional shape data based on the warp angle and the forward tilt angle at the time of wearing, and moves the movement in the three-dimensional shape data. 3. The eyeglass parameter calculation device according to claim 1, wherein the target lens figure deformed according to a position in a depth direction with respect to target lens data for each diameter angle is displayed.   The spectacle parameter calculation device according to any one of claims 1 to 3, wherein the display control means displays a target lens shape when at least a part of the spectacle frame is viewed from the front direction as the target lens shape. .   5. The eyeglass parameter calculation apparatus according to claim 4, wherein the display control means displays in addition to the target lens shape a target lens shape when at least a part of the spectacle frame is viewed from the side.   The eyeglass parameter according to any one of claims 2 to 5, further comprising an attachment angle calculating means for calculating an attachment angle of a cup as a processing jig attached to the eyeglass lens based on the rotation angle obtained by the rotation angle calculating means. Arithmetic unit.   The eyeglass parameter calculation device according to any one of claims 2 to 6, further comprising a mark point position calculation means for calculating a position of a mark point to be applied to the eyeglass lens based on the rotation angle obtained by the rotation angle calculation means. .   The spectacles parameter calculation device according to any one of claims 2 to 7, further comprising processing control means for controlling a processing operation when processing the spectacle lens based on the rotation angle obtained by the rotation angle calculation means. An imaging optical system that captures a wearing image that is at least one of a front image and a side image of a wearer including a spectacle frame;
The display control means is a spectacles parameter calculation device that displays the wearing image captured by the imaging optical system on the display unit,
And a forward tilt angle receiving means for receiving an instruction from an operator for acquiring the forward tilt angle of the spectacle frame using the wearing image displayed on the display unit,
The display control means acquires a forward tilt angle of the spectacle frame in accordance with an instruction received by the forward tilt angle receiving means,
9. The display unit according to claim 1, wherein the target figure is corrected based on the acquired forward tilt angle of the eyeglass frame and the warp angle acquired in advance and displayed on the display unit. Eyeglass parameter calculation device. A spectacle parameter calculation program executed in a spectacle parameter calculation device for calculating spectacle parameters for manufacturing spectacles,
By being executed by the processor of the eyeglass parameter calculation device,
Based on the warp angle and forward tilt angle of the spectacle frame at the time of wearing, the eyeglass parameter calculation device has a display control step for correcting the target lens shape representing the target lens shape and displaying the corrected target lens shape graphic on the display unit. A spectacles parameter calculation program characterized by being executed.

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