JP7172029B2 - Alignment device - Google Patents

Description

TECHNICAL FIELD The present disclosure relates to an axis alignment device for processing the periphery of a spectacle lens.

A lens shape that obtains edge information (e.g., edge front position, edge rear surface position, edge thickness, etc.) of a spectacle lens by bringing a probe into contact with the front and rear surfaces of the spectacle lens and rotating the spectacle lens. Measuring devices are known. Alternatively, there is known a device used for processing the periphery of a spectacle lens, which has such a lens shape measuring mechanism (see, for example, Patent Document 1).

JP 2014-0046478 A

By the way, in the above apparatus, the spectacle lens is rotated at a speed equal to or less than a predetermined speed so that the probe can reliably read the edge information of the spectacle lens. Therefore, it takes time to acquire edge information. In addition, in the above-mentioned device, the configuration of the device is complicated so as to be able to cope with various spectacle lenses having different edge thicknesses and curve values.

In view of the above-described conventional technology, the technical problem of the present disclosure is to provide an axis alignment device capable of efficiently acquiring edge information of a spectacle lens.

In order to solve the above problems, the present disclosure is characterized by having the following configurations.
(1) An axis alignment device according to a first aspect of the present disclosure is a lens shape measuring device for processing a peripheral edge of a spectacle lens, comprising: lens support means for placing the spectacle lens; a cup attachment means for attaching a cup to the surface of the spectacle lens mounted on the lens support means for holding the spectacle lens by means of lens holding means that sandwiches and holds the spectacle lens when processing the peripheral edge of the and a refractive index acquiring means for acquiring the refractive index of the spectacle lens; front image data on the front surface of the spectacle lens in a step before the spectacle lens is held by the lens holding means; rear surface image data of the rear surface of the spectacle lens; and image data acquisition means for acquiring cross-sectional image data including the cross-sectional image data; and edge information acquisition means for obtaining the edge information.

It is an external view of a cup mounting device. 4 is a schematic configuration diagram of a lens support mechanism; FIG. 4 is a schematic configuration diagram of a cup attachment mechanism; FIG. 1 is a schematic configuration diagram of a lens information measuring mechanism; FIG. It is an example of an optotype plate. 1 is a schematic configuration diagram of a cross-sectional image data acquisition mechanism; FIG. 1 is a schematic configuration diagram of a control system; FIG. 4 is a flow chart for explaining a control operation; It is an example of cross-sectional image data. It is an example of a simulation screen. It is a schematic block diagram of a lens edge processing apparatus. FIG. 10 is a diagram illustrating a Y-direction moving mechanism when lenses have different edge thicknesses; FIG. 4 is a diagram showing a state in which a lens chuck shaft holds a lens; FIG. 10 is a diagram illustrating control for displaying front image data at a predetermined position;

<Overview>
An outline of an axis alignment device according to an embodiment of the present disclosure will be described. In addition, L and R attached to a code|symbol in this indication show the left use and the right use, respectively. Also, identical, parallel, perpendicular, etc. in the present disclosure include states of substantially identical, substantially parallel, substantially perpendicular, etc., respectively. In addition, the items classified by <> below can be used independently or in conjunction with each other.

In addition, in the technology of the present disclosure, an axis alignment device will be described as an example, but at least a part of the technology of the present disclosure is not limited to the case where it is applied to the axis alignment device. For example, at least part of the technology of the present disclosure can be applied to a lens processing apparatus used to process a spectacle lens in a process before the spectacle lens is held by the lens holding means.

For example, the axis alignment device includes lens support means (for example, a lens support mechanism 10) for placing the spectacle lens, and lens holding means (for example, a , the lens holding unit 100) for setting the axial position of the spectacle lens mounted on the spectacle lens, the axial position setting means for setting the axial position of the spectacle lens mounted on the lens supporting means. and setting means. Further, for example, as the centering device, a cup attaching means for attaching a cup for holding the spectacle lens to the lens holding means to the spectacle lens based on the centering position set by the centering position setting means, It may be a cup attachment device (for example, cup attachment device 1) that includes cup attachment means (eg, cup attachment mechanism 30) for attaching a cup to the surface of a spectacle lens placed on lens support means.

For example, the centering device includes centering position setting means (for example, the lens information measuring mechanism 40). The axis-aligned position setting means sets an axis-aligned position, which is an attachment position with respect to the spectacle lens, of the lens holding means that sandwiches and holds the spectacle lens in order to process the peripheral edge of the spectacle lens. For example, the axial position may be at least one of an optical center position, a geometric center position, and the like of the spectacle lens.

For example, the axis alignment device includes refractive index acquisition means (eg, control unit 70). The refractive index acquisition means acquires the refractive index of the spectacle lens. For example, the refractive index acquisition means may acquire the refractive index of the spectacle lens measured by another device different from the axial alignment device. In this case, the configuration may be such that the operator inputs the refractive index of the spectacle lens by operating the operating means (for example, the input button 3). Further, for example, the refractive index acquisition means may include refractive index measurement means for measuring the refractive index of the spectacle lens. In this case, the refractive index of the spectacle lens is obtained by measuring the refractive index of the spectacle lens with the refractive index measuring means.

For example, the axis alignment device may include a target lens shape obtaining means (for example, the frame shape measuring mechanism 20). The target lens shape acquisition means acquires the target lens shape of the spectacle lens. For example, the target lens shape of the spectacle lens may be at least one of the inner peripheral shape of the spectacle frame, the outer peripheral shape of the demo lens, and the like.

<Image data acquisition means>
For example, the axis alignment device includes image data acquisition means (for example, image data acquisition mechanism 60). The image data acquisition means acquires cross-sectional image data including front image data on the front surface of the spectacle lens and rear surface image data on the back surface of the spectacle lens. For example, in the present embodiment, the image data acquisition means may acquire cross-sectional image data based on the target shape of the spectacle lens. In this case, the cross-sectional image data may be acquired in at least a partial area of the entire circumference of the target lens shape of the spectacle lens (all parts where the target lens shape is formed at each radial angle). In this case, cross-sectional image data may be obtained for the entire circumference of the target lens shape of the spectacle lens. Also, in this case, the cross-sectional image data may be obtained in a plurality of areas (for example, points at each predetermined radius vector angle) on the entire circumference of the target lens shape of the spectacle lens. Also, in this case, the cross-sectional image data may be acquired in a partial area on the entire circumference of the target lens shape of the spectacle lens. Note that, for example, the cross-sectional image data may be an image (image data). Also, for example, the cross-sectional image data may be a signal (signal data).

<Light projection optical system>
For example, the image data acquisition means includes a projection optical system (for example, projection optical system 64). The projection optical system projects the measurement light flux toward the front or rear surface of the spectacle lens. For example, the projection optical system may irradiate the measurement light flux perpendicularly to the lens surface of the spectacle lens. In this case, the measurement light flux may be diffusely reflected by the lens surface of the spectacle lens. Further, for example, the projection optical system may irradiate the measurement light flux with respect to the lens surface of the spectacle lens at a predetermined tilt angle.

For example, the projection optics may include a light source (eg, light source 65). The light source may be configured to irradiate the spectacle lens with a point-like measurement light flux. In this case, a point light source may be used as the light source. One point light source may be arranged to irradiate one measurement light flux. A plurality of point light sources may be arranged side by side to irradiate a measurement light flux having a width. Further, the light source may be configured to irradiate a slit-shaped measurement light flux toward the spectacle lens. For example, in this case, a slit plate and a lens may be provided in the optical path from the light source to the lens surface of the spectacle lens (that is, the front or rear surface of the spectacle lens). This also makes it possible to irradiate the spectacle lens with a measuring beam having a width.

For example, the projection optical system may have an optical member. For example, at least one of a lens, mirror, diaphragm, and the like may be used as the optical member. In this case, for example, the measurement light flux emitted from the light source may be irradiated toward the lens surface of the spectacle lens via each optical member. Of course, the optical member is not limited to the optical member described above, and a different optical member may be used.

<Light receiving optical system>
For example, the image data acquisition means includes a light receiving optical system (for example, light receiving optical system 66). The light-receiving optical system may include a light-receiving element (for example, the imaging element 69). The light-receiving optical system receives a first reflected light beam, which is the measurement light beam reflected by the front surface of the spectacle lens, and a second reflected light beam, which is the measurement light beam reflected by the rear surface of the spectacle lens, by the light receiving element. For example, the light-receiving optical system may receive a reflected light beam (for example, specularly reflected light, scattered light, etc.) reflected by the lens surface of the spectacle lens with a light-receiving element.

For example, in the present embodiment, the image data acquisition means provides cross-sectional image data (for example, cross-sectional image data 75). For example, this allows the image data acquisition means to acquire cross-sectional image data in a non-contact manner using the measurement light flux. Therefore, the operator can efficiently acquire the edge information of the spectacle lens. In addition, this allows the image data acquisition means to acquire cross-sectional image data with a simple configuration.

For example, the light receiving optical system may have an optical member. For example, at least one of a lens, mirror, diaphragm, and the like may be used as the optical member. In this case, the light flux reflected by the lens surface of the spectacle lens may be received by the light receiving element via each optical member. Of course, the optical member is not limited to the optical member described above, and a different optical member may be used.

<Means for obtaining edge information>
For example, the axis alignment device includes edge information acquisition means (for example, the control unit 70). The edge information obtaining means obtains edge information that is information about the edge of the spectacle lens. For example, the edge information may be at least one of the front position of the spectacle lens, the posterior position of the spectacle lens, the thickness of the spectacle lens edge, and the like. Also, for example, the edge information may be at least one of the front curve value of the spectacle lens and the back curve value of the spectacle lens. As a result, the edge information, which has conventionally been obtained using a lens edge processing device, can now be obtained using an axis alignment device. Therefore, the usage time of the lens rim processing device is shortened, and the time required for manufacturing eyeglasses can be relatively shortened.

For example, the edge information acquiring means may have edge measuring means. The edge measuring means is used to obtain edge information of the spectacle lens. For example, in the present embodiment, the measurement optical system (for example, the measurement optical system 61) included in the image data acquisition means also serves as the edge measurement means. Further, for example, in the present embodiment, the edge measuring means acquires edge information of the spectacle lens placed on the lens supporting means. The edge measuring means may be configured to obtain edge information of the spectacle lens in a non-contact manner. Of course, the edge measuring means may be configured to obtain the edge information of the spectacle lens in a contact manner. In this case, the edge information may be obtained by bringing the stylus or the like into contact with the spectacle lens. For example, the edge information acquiring means measures the spectacle lens by controlling the edge measuring means and acquires the edge information. As a result, it is possible to measure the edge information of the spectacle lens using the centering device, and it is possible to shorten the operating time of the lens edge processing device.

For example, the edge information acquiring means may acquire edge information by controlling the edge measuring means based on the target lens shape of the spectacle lens. As a result, the edge of the position based on the target lens shape of the spectacle lens (for example, at least one of the position matching the target target shape, the position of the bevel at each radial angle, the position of the chamfer at each radial angle, etc.) Information is obtained. That is, edge information of at least one of the periphery and the periphery of the target lens shape of the spectacle lens is acquired. Note that, for example, when edge information of a plurality of regions (for example, points at each predetermined radial angle, etc.) in the entire circumference of the target lens shape of the spectacle lens is acquired as a position based on the target target shape of the spectacle lens. Alternatively, the edge information at that position may be acquired by interpolation using the edge information at the surrounding radius vector angles.

For example, the edge information acquiring means may acquire edge information, which is information relating to the edge of the spectacle lens, based on the refractive index and cross-sectional image data of the spectacle lens. This makes it possible to efficiently acquire the edge information of the spectacle lens by using the cross-sectional image data changed by the refractive index of the spectacle lens. Note that the edge information obtaining means may correct the edge information of the spectacle lens based on the refractive index and cross-sectional image data of the spectacle lens. In this case, the edge information acquiring means may be configured to correct cross-sectional image data based on the refractive index and acquire edge information based on the corrected cross-sectional image data. In this case, the edge information acquiring means may acquire edge information by correcting the edge information acquired based on the cross-sectional image data based on the refractive index.

<Finishing Position Setting Means>
For example, the alignment device includes finishing position setting means (for example, control unit 70). The finishing position setting means sets the finishing position of the edge based on the edge information of the spectacle lens. For example, the finishing position of the edge may be at least one of the position of the bevel formed on the edge of the spectacle lens, the position of the groove, the position of the chamfer, and the like. As a result, the finishing position, which has conventionally been set using a lens edge processing device, can be set using the centering device. Therefore, the usage time of the lens edge processing device is shortened, the waiting time of the lens edge processing device is reduced, and the time required for manufacturing the spectacles can be further shortened.

For example, the finishing position setting means displays the finishing position based on the edge information on the display means (for example, the display 2). For example, the finishing position setting means may be configured to automatically set the edge finishing position based on the edge information. Further, for example, the finish machining position setting means may be configured such that the operator manually sets the finish machining position of the edge. In this case, the finishing position setting means sets the finishing position based on the operation signal from the operating means for adjusting the finishing position on the display means. This makes it easier for the operator to grasp the finishing position formed on the spectacle lens. In addition, the operator can easily adjust the finishing position formed on the spectacle lens.

The finishing position setting means may display the finishing position based on the edge information of the left spectacle lens and the finishing position based on the edge information of the right spectacle lens on the display means for comparison. Further, the finishing position setting means may set the finishing position of at least one of the left spectacle lens and the right spectacle lens based on the operation signal from the operation means. For example, in this case, the configuration may be such that the display means is provided with the operation means. Further, for example, in this case, the configuration may be such that the display means and the operation means are provided separately. This makes it easier for the operator to grasp the balance of the finishing positions on the left spectacle lens and the right spectacle lens. Further, the operator can adjust the finishing positions set for the left spectacle lens and the right spectacle lens in consideration of the balance of the finishing positions. Therefore, it becomes easier for the operator to produce good-looking eyeglasses.

In addition, in this embodiment, the lens support means for placing the spectacle lens, and the lens holding means (for example, the lens holding unit 100) for sandwiching and holding the spectacle lens for processing the peripheral edge of the spectacle lens, a centering position setting means for setting a centering position which is an attachment position to the spectacle lens, the centering position setting means for setting the centering position of the spectacle lens mounted on the lens supporting means. The device may be used as a lens shape measuring device. Further, in the present embodiment, the cup attachment means attaches a cup for holding the spectacle lens to the lens holding means to the spectacle lens based on the axis-aligned position set by the axis-alignment position setting means. A cup attachment device having cup attachment means for attaching a cup to the surface of the spectacle lens placed on the support means may be used as the lens shape measuring device. Further, in the present embodiment, a lens peripheral edge processing device (eg, lens peripheral edge processing device 90) provided with a processing tool (eg, processing unit 300) for processing the peripheral edge of the spectacle lens held by the lens holding means, It may be used as a lens shape measuring device. For example, in at least one of the axis alignment device, the cup mounting device, and the lens rim processing device, by acquiring the edge information of the spectacle lens in a non-contact manner, the operator can efficiently obtain the edge information of the spectacle lens. You will be able to obtain

In this embodiment, an eyeglass lens processing system for processing eyeglass lenses may be constructed using the above-described centering device (or cup mounting device). For example, in this case, in order to process the peripheral edge of the spectacle lens, a lens holding means (for example, the lens holding unit 100) that sandwiches and holds the spectacle lens is attached to the spectacle lens. An axis alignment device having extension position setting means, a processing tool, a lens holding means for holding a spectacle lens, and a processing control data acquiring means (for example, a control unit) for acquiring processing control data for processing the peripheral edge of the spectacle lens. 95), and a lens edge processing device for processing the eyeglass lens held by the lens holding means by controlling the processing tool based on the processing control data acquired by the processing control data acquisition means. A conventional eyeglass lens processing system may be constructed.

Further, for example, in this case, a cup mounting device having a cup mounting means for mounting the cup on the surface of the spectacle lens, a processing tool, a lens holding means for holding the spectacle lens to which the cup is mounted, and the peripheral edge of the spectacle lens and a processing control data acquiring means for acquiring processing control data for processing the processing tool, based on the processing control data acquired by the processing control data acquiring means, and held in the holding means by controlling the processing tool A spectacle lens processing system using a lens edge processing device for processing a spectacle lens may be constructed. Note that in such a spectacle lens processing system, the first edge information of the spectacle lens may be acquired in the cup attachment device. Further, in such a spectacle lens processing system, the edge finish processing position may be set based on the first edge information of the spectacle lens. Further, in such a spectacle lens processing system, the second edge information at least one radial angle of the spectacle lens may be obtained in the lens periphery processing device. For example, as the second edge information, edge information of one point of the spectacle lens may be acquired. Further, for example, as the second edge information, edge information of a plurality of points on the spectacle lens may be acquired. When obtaining edge information of a plurality of points as the second edge information, at least one of deformation and inclination of the spectacle lens caused by holding the spectacle lens by the lens holding means is predicted. good too. Thereby, the processing control data acquiring means may acquire the processing control data based on the first edge information, the second edge information, and the finishing position.

In addition, in the present embodiment, a spectacle lens processing method for processing the peripheral edge of a spectacle lens may be implemented using the above-described centering device (or cup mounting device). For example, in this case, a first edge information acquiring step of acquiring the first edge information of the spectacle lens, and an axis alignment position, which is an attachment position with respect to the spectacle lens, of the lens holding means that holds the spectacle lens by sandwiching the spectacle lens are set. After performing the axis alignment position setting step, the first edge information acquisition step, and the axis alignment position setting step, the spectacle lens is held by the lens holding means of the lens edge processing device based on the set axis alignment position. After the holding step, the first edge information acquiring step, and the axis alignment position setting step are performed, a machining control data acquiring step for acquiring machining control data based on the first edge information; and based on the machining control data, and a processing step of controlling a processing tool to process the spectacle lens held by the lens holding means.

Further, for example, in this case, a first edge information obtaining step of obtaining first edge information of the spectacle lens, a cup attaching step of attaching a cup to the spectacle lens, a first edge information obtaining step, and a cup attaching step are performed. After the execution, the holding step of holding the spectacle lens to which the cup is attached in the lens holding means of the lens rim processing device, the first edge information acquiring step, and the cup attaching step are carried out. a processing control data acquisition step of acquiring processing control data based on the processing control data; and a processing step of controlling a processing tool to process the eyeglass lens held by the lens holding means based on the processing control data. may

In such a spectacle lens processing method, a finishing position setting step of setting a finish processing position of the edge may be performed based on the first edge information of the spectacle lens. In this case, the holding step holds the spectacle lens to which the cup is attached by the lens holding means of the lens peripheral edge processing device after the processing position setting step and the cup attaching step are performed, and the processing control data acquisition step includes processing Machining control data may be obtained based on the finishing machining position after the positioning step and the cup mounting step are performed.

Further, in such a spectacle lens processing method, after the holding step is performed, a second edge information obtaining step of obtaining second edge information at at least one radius vector angle of the spectacle lens may be performed. In this case, the processing control data obtaining step may obtain the processing control data based on the first edge information, the second edge information, and the finishing position.

Note that the technology of the present disclosure may be applied to a lens processing device for processing spectacle lenses in addition to the centering device. In this case, a lens processing apparatus different from the lens peripheral edge processing apparatus for processing the spectacle lens performs a processing step before the spectacle lens is held by the lens holding means provided in the lens peripheral edge processing apparatus. The lens processing apparatus for eyeglass lenses may include edge information acquiring means for acquiring edge information, which is information relating to the edge of the spectacle lens. For example, such a lens processing device may be a lens meter. Further, such a lens processing device may be a spectacle frame shape measuring device.

<Example>
An embodiment of the present disclosure will be described with reference to the drawings. In this embodiment, as an axis alignment device, a cup attachment device for attaching a cup Cu to which a lens chuck shaft is attached to the lens LE is exemplified. However, at least some of the techniques illustrated in this embodiment can be applied to devices other than cup attachment devices. For example, at least a part of the technique illustrated in this embodiment is applied to a device that holds the lens LE by the lens chuck shaft without the cup Cu at the set axis-aligned position. can.

In this embodiment, the above-described axis alignment device will be described as an example, but at least a part of the technology illustrated in this embodiment is not limited to the case where it is applied to the axis alignment device. For example, at least part of the technique illustrated in this embodiment can be applied to a lens processing apparatus used for processing a lens in a process before the lens is held by the lens holding means. In this case, a lens processing apparatus different from the lens peripheral edge processing apparatus for processing the spectacle lens performs a processing step before the spectacle lens is held by the lens holding means provided in the lens peripheral edge processing apparatus. The lens processing apparatus for eyeglass lenses may include edge information acquiring means for acquiring edge information, which is information relating to the edge of the spectacle lens. For example, such a lens processing device may be a lens meter. Further, such a lens processing device may be a spectacle frame shape measuring device. Of course, the lens processing apparatus may be provided with finishing position setting means for setting the finishing position.

FIG. 1 is an external view of the cup mounting device 1. FIG. The cup attachment device 1 includes a display (monitor) 2, an input button 3, a lens support mechanism 10, a frame shape measurement mechanism 20, a cup attachment mechanism 30, a lens information measurement mechanism 40, an image data acquisition mechanism 60, and the like. For example, the display 2 may be at least one of an LCD (Liquid Crystal Display), an organic EL (Electro Luminescence) display, a plasma display, and the like. For example, the display 2 is a touch panel. That is, the display 2 includes an operation unit (input button 3) for inputting signals, parameters, and the like for causing the cup mounting device 1 to execute various processes, and various information (for example, input parameters, optical characteristics of the lens LE, etc.). , edge information of the lens LE, etc.). Note that the display 2 and the operation unit may be provided separately. In this case, at least one of a mouse, a joystick, a keyboard, a mobile terminal, and the like may be used as the operation unit.

<Lens support mechanism>
FIG. 2 is a schematic configuration diagram of the lens support mechanism 10. As shown in FIG. The lens support mechanism 10 is used to mount the lens LE with the surface (front surface) of the lens LE facing upward. For example, the lens support mechanism 10 includes a cylindrical base 11, a ring member 12, a protective cover 13, a support pin 14, a rotating shaft 15, an arm 16, and the like. A protective cover 13 attached to a ring member 12 is installed on the upper portion of the cylindrical base 11 . Inside the cylindrical base 11, an optotype plate 46 and the like, which will be described later, are arranged. A rotating shaft 15 is arranged on the outer peripheral portion of the cylindrical base 11 . An arm 16 is attached to the upper end of each rotating shaft 15 . A support pin 14 is arranged at the tip of each arm 16 . In addition, in this embodiment, the support pins 14 are arranged equidistantly and equiangularly with respect to the optical axis L1. The support pin 14 holds the lens by coming into contact with the back surface (rear surface) of the lens LE.

For example, the rotary shaft 15 rotates around the central axis K1 via a rotation transmission mechanism (not shown) that transmits rotation of a motor or the like. For example, in conjunction with the rotation of the rotary shaft 15, the arm 16 and the support pin 14 move from the retracted position indicated by the solid line to the supported position indicated by the dotted line. This makes it possible to adjust the distance from the optical axis L1 to the support pins 14 and the spacing between the support pins 14, and change the size of the area that the support pins 14 can support.

Further, for example, the cylindrical base 11 rotates around the optical axis L1 through a rotation transmission mechanism including a motor 17 and a gear mechanism (not shown). For example, rotation of the motor 17 is transmitted to the cylindrical base 11 by a gear mechanism (not shown). For example, in conjunction with the rotation of the cylindrical base 11, the rotating shaft 15, the arm 16 attached to the rotating shaft 15, and the support pin 14 arranged on the arm 16 move integrally around the ring member 12. do. Thereby, the lens LE mounted on the support pin 14 can be rotated.

<Frame shape measurement mechanism>
For example, the frame shape measuring mechanism 20 is used when tracing the shape of a spectacle frame (hereinafter referred to as frame). As a result, the inner peripheral shape of the frame (in other words, the target lens shape of the lens LE, which will be described later) and the like can be acquired. For the configuration of the frame shape measuring mechanism 20, see Japanese Unexamined Patent Application Publication No. 2015-31847, for example.

<Cup attachment mechanism>
FIG. 3 is a schematic configuration diagram of the cup mounting mechanism 30. As shown in FIG. The cup attachment mechanism 30 is used to attach the cup Cu to the surface (front surface) of the lens LE. That is, the cup mounting mechanism 30 is used to fix (axially strike) the cup Cu on the surface of the lens LE. In this embodiment, the cup is fixed on the surface of the lens LE, but the position is not limited to this. The fixed position of the cup may be the back surface (rear surface) of the lens.

For example, in the present embodiment, the cup attachment mechanism 30 is positioned at an off-axis position, which is an attachment position with respect to the lens LE, of the lens holding unit 100 (see FIG. 11) that sandwiches and holds the lens LE in order to process the peripheral edge of the lens LE. set. For example, the cup attachment mechanism 30 relatively changes the positions of a cup Cu attached to an attachment portion 31 (to be described later) and the lens LE supported by the lens support mechanism 10. Attach the cup Cu to the appropriate position. As a result, an appropriate position (the position where the cup Cu is attached) on the lens LE can be clamped by the lens chuck shafts 102L and 102R (see FIG. 11) of the lens edge processing device 90. FIG. The axis alignment position may be set at the optical center position O (see FIG. 6) of the lens LE, or may be set at the geometric center position. Of course, a position different from the above may be set as the axis alignment position. For example, in this embodiment, the axial alignment position is set to the optical center position O of the lens LE.

For example, the cup attachment mechanism 30 includes a mounting portion 31, an arm 32, an arm holding base 33, an X-direction movement mechanism 35, a Y-direction movement mechanism 36, a Z-direction movement mechanism 37, and the like. For example, the mounting portion 31 is fixed to the arm 32 . For example, the mounting portion 31 is fitted with an uneven portion formed on the cup Cu. For example, the arm 32 has a rotation transmission mechanism (not shown) for variably holding the rotation angle of the mounting portion 31 in the horizontal direction. For example, arm 32 is attached to arm holding base 33 . For example, arm holding base 33 includes motor 34 . For example, the rotation of the motor 34 is transmitted to the mounting portion 31 via a rotation transmission mechanism (not shown) included in the arm 32 . That is, the mounting portion 31 rotates around the central axis K1 of the cup Cu as the motor 34 rotates. This makes it possible to change the rotation angle of the cup Cu in the horizontal direction.

For example, the X-direction moving mechanism 35 moves in the left-right direction (X direction) of the cup attaching device 1 . For example, a Y-direction moving mechanism 36 is installed above the X-direction moving mechanism 35 . For example, the Y-direction moving mechanism 36 moves in the vertical direction (Y-direction) of the cup mounting device 1 . For example, a Z-direction moving mechanism 37 is installed above the Y-direction moving mechanism 36 . For example, the Z-direction moving mechanism 37 moves in the front-rear direction (Z-direction) of the cup mounting device 1 . For example, the Z-direction movement mechanism 37 holds the arm 32 , the arm holding base 33 and the motor 34 . For example, in this embodiment, by moving the X-direction moving mechanism 35, the Y-direction moving mechanism 36, the Z-direction moving mechanism 37, the arm 32, etc. move in the left-right direction with respect to the cup attaching device 1. FIG. Further, for example, by moving the Z-direction moving mechanism 37 , the arm 32 and the like move in the front-rear direction with respect to the cup attaching device 1 . As a result, the mounting portion 31 held by the arm 32 moves to the upper portion of the lens support mechanism 10 . Further, for example, by moving the Y-direction moving mechanism 36, the Z-direction moving mechanism 37, the arm 32, and the like move vertically with respect to the cup attaching device 1. As shown in FIG. As a result, the cup Cu attached to the attachment portion 31 is axially struck against the front surface of the lens LE placed on the support pin 14 .

<Lens information measurement mechanism>
FIG. 4 is a schematic configuration diagram of the lens information measuring mechanism 40 provided in the cup mounting device 1. As shown in FIG. For example, the lens information measuring mechanism 40 in this embodiment includes a measurement optical system for acquiring the optical characteristics of the lens, and information on the lens different from the optical characteristics of the lens (for example, the external shape of the lens, a mark attached to the lens). points, hidden marks formed on the lens, etc.). Note that the measurement optical system for acquiring the optical characteristics of the lens and the measurement optical system for acquiring lens information different from the optical characteristics of the lens may be provided separately.

For example, the lens information measuring mechanism 40 includes an illumination optical system 41, a light receiving optical system 45, an imaging optical system 48, and the like. For example, the illumination optical system 41 includes a light source 42, a half mirror 43, a concave mirror 44, and the like. For example, the light source 42 irradiates the lens with a measurement beam. For example, the light source 42 may be an LED (Light Emitting Diode). For example, the measurement light flux emitted from the light source 42 is reflected by the half mirror 43 arranged on the optical axis L2 and coincides with the optical axis L2. For example, the concave mirror 44 reflects the measurement light flux from the optical axis L1 toward the optical axis L2, and directs the measurement light flux to a parallel light flux (substantially parallel light flux) having a diameter larger than that of the lens LE arranged on the optical axis L1. to shape. Although it is possible to use a lens instead of a concave mirror, it is advantageous to use a concave mirror in order not to increase the size of the device.

For example, the light receiving optical system 45 includes an optotype plate 46, an imaging device 47, and the like. For example, the optotype plate 46 is used to detect the optical center of the lens LE. Details of the optotype plate 46 will be described later. For example, the imaging element 47 captures an image of the measurement light beam irradiated from the light source 42 and passed through the lens LE and the optotype plate 46 . For example, the imaging element 47 may be a CCD (Charge Coupled Device), a CMOS (Complementary Metal Oxide Semiconductor), or the like. The light-receiving optical system 45 in this embodiment may have a configuration in which a lens is arranged between the optotype plate 46 and the imaging device 47 .

For example, the imaging optical system 48 includes a concave mirror 44, an aperture 49, an imaging lens 50, an imaging element 51, and the like. For example, the imaging magnification of the imaging optical system 48 is a magnification at which the entire lens LE is imaged by the imaging element 51 . For example, the concave mirror 44 in the imaging optical system 48 is shared with the concave mirror 44 in the illumination optical system 41 . For example, the diaphragm 49 is arranged at the focal position (approximate focal position) of the concave mirror 44 . For example, the diaphragm 49 has a conjugate (substantially conjugate) positional relationship with the light source 42 . For example, the imaging device 51 captures an image of a reflected light flux emitted from the light source 42 and reflected by a retroreflective member 52 described later. For example, the imaging element 51 may be a CCD (Charge Coupled Device), a CMOS (Complementary Metal Oxide Semiconductor), or the like. For example, the focal position of the imaging device 51 is set near the surface of the lens LE by the imaging lens 50 and the concave mirror 44 . As a result, it is possible to image the marking points on the surface of the lens, the hidden marks formed on the lens, etc., in an almost in-focus state.

<Optical target plate>
FIG. 5 is an example of the optotype plate 46 . For example, the optotype plate 46 is formed with a large number of openings (light passage openings) 55 in a predetermined pattern. For example, in this embodiment, the openings 55 are formed by attaching a retroreflective member 52 (to be described later) to areas other than the openings 55 (that is, the hatched areas in FIG. 5). Further, for example, in this embodiment, the circular openings 55 are arranged at regular intervals. Note that the optotype plate 46 only needs to have a pattern capable of detecting the optical center and optical characteristics of the lens LE, and the shape and spacing of the openings 55 are not limited to this embodiment.

For example, the opening 55 consists of a central hole 56 formed in the center of the optotype plate 46 and peripheral holes 57 formed around the central hole 56 . For example, the center hole 56 coincides with the optical axis L1. For example, the central hole 56 in this embodiment can be distinguished from the peripheral hole 57 by having a size different from that of the peripheral hole 57 . Note that the size, number, shape, position, etc. of the central hole 56 may be different from those of the present embodiment as long as they can be distinguished from the peripheral holes 57 . Accordingly, when the image of the aperture 55 captured by the imaging device 47 (hereinafter referred to as aperture image) is deviated due to the optical characteristics of the lens LE, the correspondence relationship between the peripheral holes 57 can be identified. More specifically, the image of the peripheral hole 57 captured with the lens LE not placed on the support pins 14 is the image of the peripheral hole 57 captured with the lens LE placed on the support pins 14. It is possible to specify which of the images corresponds.

For example, the retroreflective member 52 is used to reflect the measurement light beam in the same direction (substantially the same direction) as the incident direction. For example, the retroreflective member 52 is attached to the upper surface of the optotype plate 46 and the upper surface of the disk member 54 having the opening 53 in the center. For example, the disk member 54 may be rotated around the optical axis L1 by a rotation mechanism (not shown). For details of the retroreflective member 52 and its rotating mechanism, for example, see Japanese Patent Application Laid-Open No. 2008-299140.

<Image data acquisition mechanism>
FIG. 6 is a schematic configuration diagram of the image data acquisition mechanism 60. As shown in FIG. The image data acquisition mechanism 60 acquires cross-sectional image data 75 including front image data P1s on the front surface of the lens LE and rear surface image data Q2s on the rear surface of the lens LE (see FIG. 9). For example, in this embodiment, the image data acquisition mechanism 60 may include a projection optical system 64 that projects the measurement light flux toward the front or rear surface of the lens LE. Further, for example, in this embodiment, the image data acquisition mechanism 60 receives the first reflected light beam R1 reflected by the front surface of the lens LE and the second reflected light beam R2 reflected by the rear surface of the lens LE. A light receiving optical system 66 may be provided. That is, the image data acquisition mechanism 60 in this embodiment acquires the cross-sectional image data 75 including the front image data P1s formed by the first reflected light flux R1 and the rear image data Q2s formed by the second reflected light flux. can do.

The image data acquisition mechanism 60 includes a measurement optical system 61, a Y-direction movement mechanism 62, a Z-direction movement mechanism 63, and the like. For example, the measurement optical system 61 in this embodiment is configured to obtain cross-sectional image data 75 of the lens LE by a light projecting optical system 64 and a light receiving optical system 66 based on the Scheimpflug principle. Of course, the measurement optical system 61 may use an optical system having a different configuration instead of an optical system based on the Scheimpflug principle.

The projection optical system 64 projects the measurement light flux toward the front or rear surface of the lens LE. For example, the projection optical system 64 may project the measurement beam perpendicular to the lens LE. In this case, the optical axis L3 of the projection optical system 64 is perpendicular to the lens LE. Further, for example, the projection optical system 64 may project the measurement light beam at a predetermined tilt angle with respect to the lens LE. For example, in this embodiment, the projection optical system 64 vertically projects the measurement light beam toward the front surface of the lens LE. In this case, the measurement light flux may be diffusely reflected on the front surface of the lens LE.

The projection optical system 64 has a light source 65 . The light source 65 irradiates the lens LE with a measurement light beam. For example, light source 65 may be an LED, laser, or the like. The projection optical system 64 in this embodiment may have a configuration in which a lens is arranged between the light source 65 and the lens LE. Further, the projection optical system 64 in this embodiment may have a configuration in which a pinhole is arranged between the light source 65 and the lens LE.

The light receiving optical system 66 receives the first reflected light flux R1 reflected by the front surface of the lens LE and the second reflected light flux R2 reflected by the rear surface of the lens LE. For example, the optical axis L4 of the light receiving optical system 66 is arranged at a predetermined angle of inclination with respect to the optical axis L3 of the light projecting optical system 64 . The light receiving optical system 66 includes a lens 67, a diaphragm 68, an imaging device 69, and the like. The lens 67 converges reflected light beams reflected by the front and rear surfaces of the lens LE (eg, specularly reflected light of the lens LE, scattered light of the lens LE, etc.) at the position of the diaphragm 68 . A diaphragm 68 is placed at the focal length of lens 67 . Further, even if the distance between the light receiving optical system 66 and the lens LE changes, the diaphragm 68 does not change the size of the images of the first reflected light flux R1 and the second reflected light flux R2 captured by the imaging device 69 (that is, are arranged so that the imaging magnification is constant). The imaging device 69 may be a two-dimensional imaging device (eg, at least one of CCD, CMOS, etc.), or may be a one-dimensional imaging device (eg, line sensor, etc.). The imaging element 69 is arranged at a position conjugate with the lens LE. The imaging device 69 may be arranged such that its light receiving surface is perpendicular to the optical axis L4. Note that the lens 67 and the imaging device 69 are arranged on the optical axis L4 based on the Scheimpflug principle. For example, the measurement light beam irradiated to the lens LE by the projection optical system 64, the lens system including the lens LE and the lens 67, and the light receiving surface (that is, the imaging position) of the image sensor 69 have a Scheimpflug relationship. placed.

For example, the measurement light flux irradiated onto the lens LE is split into a reflected light flux reflected by the front surface of the lens LE and a measurement light flux directed to the rear surface of the lens LE. The measurement light flux is reflected in various directions on the front surface of the lens LE. to reach The measurement light beam directed toward the rear surface of the lens LE is reflected in various directions by the rear surface of the lens LE. It reaches the imaging element 69 via the diaphragm 67 and the diaphragm 68 . For example, in this manner, the imaging device 69 can capture images of the first reflected light flux and the second reflected light flux reflected at the same angle by the front and rear surfaces of the lens LE.

In this embodiment, the diaphragm 68 is used to guide the measurement light beam reflected in parallel with the optical axis L4 to the imaging element 69, but the present invention is not limited to this. For example, the diaphragm 68 may guide the measurement light flux that has not been reflected parallel to the optical axis L4 to the imaging device 69 .

The Y-direction moving mechanism 62 adjusts the imaging position of the imaging element 69 by adjusting the position of the measurement optical system 61 in the vertical direction (Y direction). For example, the Y-direction moving mechanism 62 integrally moves the light projecting optical system 64 and the light receiving optical system 66 in the Y direction. For example, the Y-direction movement mechanism 62 may be composed of a motor and a slide mechanism. The Z-direction movement mechanism 63 adjusts the position of the measurement light beam emitted from the light source 65 toward the lens LE by adjusting the position of the measurement optical system 61 in the front-rear direction (Z direction). For example, the Z-direction moving mechanism 63 integrally moves the light projecting optical system 64 and the light receiving optical system 66 in the front-rear direction (Z direction). For example, the Z-direction movement mechanism 63 may be composed of a motor and a slide mechanism. In addition, in the embodiment, the configuration in which the light projecting optical system 64 and the light receiving optical system 66 move integrally was taken as an example, but the present invention is not limited to this. For example, the configuration may be such that the light projecting optical system 64 and the light receiving optical system 66 are moved separately.

For example, the image data acquisition mechanism 60 can acquire cross-sectional image data 75 (see FIG. 9) corresponding to lenses LE with various edge thicknesses t (hereinafter referred to as edge thickness t) by including the Y-direction movement mechanism 62. become. FIG. 12 is a diagram for explaining the Y-direction moving mechanism 62 when the edge thickness t of the lens LE is different. FIG. 12(a) is a diagram showing a reflected light beam when the edge of the lens LE is thin. FIG. 12(b) is a diagram showing a reflected light beam when the edge of the lens LE is thick. FIG. 12(c) is a diagram showing reflected light beams when the imaging position of the imaging element 69 is adjusted from the state shown in FIG. 12(b).

For example, the distance W between the first reflected light beam R1 reflected by the front surface of the lens LE and the second reflected light beam R2 reflected by the rear surface of the lens LE changes depending on the edge thickness t of the lens LE. For example, the distance W between the first reflected light flux R1 and the second reflected light flux R2 is wider in the lens LE with the thick edge than in the lens LE with the thin edge. For example, as shown in FIGS. 12(a) and 12(b), when the measurement optical system 61 is fixedly arranged, the first reflected light flux R1 and the second reflected light flux R2 may differ depending on the edge thickness t of the lens LE. Both may not reach the light receiving surface of the imaging device 69 . For example, in FIG. 12B, the second reflected light flux R2 is out of the light receiving surface of the imaging device 69. In FIG. Therefore, the imaging position of the imaging device 69 is adjusted by driving the Y-direction moving mechanism 62 so that both the first reflected light flux R1 and the second reflected light flux R2 reach the light receiving surface of the imaging device 69 . For example, in this embodiment, the Y-direction moving mechanism 62 moves the measurement optical system 61 in a direction approaching the lens LE. As a result, the first reflected light flux R1 and the second reflected light flux R2 reach the light receiving surface of the imaging element 69 as shown in FIG. 12(c). Further, as a result, the image data acquisition mechanism 60 obtains cross-sectional image data 75 (see FIG. 9) including the front image data P1s formed by the first reflected light flux R1 and the rear image data Q2s formed by the second reflected light flux. reference) can be obtained.

When the measurement optical system 61 is fixedly arranged, even if the edge of the lens LE is thin, if the curve value of the lens LE is large, both the first reflected light flux R1 and the second reflected light flux R2 will pass through the image sensor 69. It may not reach the light receiving surface. Even in such a case, cross-sectional image data 75 including front image data P1s and rear image data Q2s can be acquired by driving the Y-direction moving mechanism 62 and adjusting the imaging position of the image sensor 69. become.

Further, for example, the image data acquisition mechanism 60 (see FIG. 6) is provided with a Z-direction movement mechanism 63 to direct the measurement light flux from the projection optical system 64 toward the position based on the target lens shape TG of the lens LE. can be irradiated. The position based on the target lens shape of the lens LE may be a position that matches the target target shape, or a position calculated based on the target target shape (for example, the position of the bevel at each radial angle, each position of the chamfer in the radial angle, etc.). For example, in this embodiment, the rotation of the cylindrical base 11 (see FIG. 2) rotates the lens LE mounted on the support pins 14 in the horizontal direction, and the Z-direction movement mechanism 63 moves the measurement optical system 61. By moving the lens LE in the radial length direction, the measurement light flux is irradiated to the position based on the target lens shape TG of the lens LE. Thereby, the image data acquisition mechanism 60 can acquire the cross-sectional image data 75 based on the target lens shape of the lens LE.

<Control system>
FIG. 7 is a schematic configuration diagram of a control system provided in the cup attaching device 1. As shown in FIG. The control unit 70 includes a CPU (processor), RAM, ROM, and the like. For example, the CPU of the control section 70 controls the cup mounting device 1 . The RAM of the control unit 70 temporarily stores various information. Various programs executed by the CPU are stored in the ROM of the control unit 70 .

For example, the control unit 70 includes the display 2, the input button 3, the motor 34, the light source 42, the light source 65, the image sensor 47, the image sensor 51, the image sensor 69, the nonvolatile memory 71 (hereinafter referred to as the memory 71), and the like. properly connected. Further, for example, the controller 70 is connected to motors (not shown) included in the X-direction moving mechanism 35, the Y-direction moving mechanism 36, and the Z-direction moving mechanism 37 of the cup attaching mechanism 30, respectively. Further, for example, the controller 70 is connected to motors (not shown) included in the Y-direction moving mechanism 62 and the Z-direction moving mechanism 63 of the image data acquisition mechanism 60 .

For example, the memory 71 may be a non-transitory storage medium that can retain stored content even when the power supply is interrupted. For example, the memory 71 can be a hard disk drive, flash ROM, USB memory, or the like. For example, the memory 71 stores the optical characteristics of the lens LE measured by the lens information measuring mechanism 40, cross-sectional image data of the lens LE acquired by the measuring optical system 61, and the inner peripheral shape of the frame traced by the frame shape measuring mechanism 20. , etc. may be stored.

<Control action>
Control of the cup mounting device 1 having the above configuration will be described. The operator processes the lens LE using the cup attaching device 1 and the lens edge processing device when manufacturing the spectacles. Here, conventionally, the cup attaching device 1 is used to attach the cup Cu to the surface of the lens LE. Further, conventionally, in order to obtain edge information of the lens LE, in order to set the finishing position (for example, the position of the bevel, the position of the groove, the position of the chamfer, etc.) to be formed on the edge of the lens LE, and the lens LE In order to process the periphery of the lens, a lens peripheral processing device has been used. In such a series of operations, it was found that the time for using the lens rim processing device was overwhelmingly longer than the time for using the cup mounting device 1 . Although the operator wants to perform the work efficiently, there are cases in which the operator cannot proceed to the next step even after the attachment of the cup Cu to the lens LE is completed, because the lens edge processing device is in use. rice field.

Therefore, in the present embodiment, the cup attachment device 1 is used to attach the cup Cu to the lens LE, obtain the edge information, and perform finishing so that the operator waits for the vacancy of the lens edge processing device to be alleviated. The processing position is set, and the peripheral edge of the lens LE is processed using the lens peripheral edge processing device. Steps S1 to S8 will be described in order below based on the flowchart shown in FIG. For example, in this embodiment, steps S1 to S7 are performed using the cup mounting device 1, and steps S8 to S12 are performed using the lens edge processing device.

<Cup mounting device>
For example, the operator activates the cup mounting device 1 and sequentially performs the steps described below.

<Acquisition of target lens shape (S1)>
First, the control unit 70 acquires the target lens shape of the lens LE. The target lens shape of the lens LE may be the outer peripheral shape of the demo lens, the inner peripheral shape of the frame, or the like. For example, when obtaining the outer peripheral shape of the demo lens, the lens information measuring mechanism 40 may be used to capture an entire image of the demo lens, thereby detecting the outer peripheral shape. Further, for example, when acquiring the inner peripheral shape of the frame, the inner peripheral shape may be detected by tracing the frame using the frame shape measuring mechanism 20 . Of course, the target lens shape of the lens LE obtained using another device may be read into the cup attaching device 1 . For example, the control unit 70 stores the target lens shape of the lens LE thus acquired in the memory 71 . Note that the target lens shape of the lens LE may be obtained for both the left lens and the right lens. The target lens shape of either one of the left lens and the right lens may be acquired, and by horizontally reversing this, the target lens shape of the other lens may be acquired.

<Acquisition of Refractive Index (S2)>
Subsequently, the control unit 70 acquires the refractive index of the lens LE. The refractive index of the lens LE may be obtained by operating the input button 3 by the operator. For example, since the refractive index is determined by the material (for example, plastic, glass, etc.) of the lens LE (that is, the refractive index is determined by the lens LE to be processed), the operator inputs a known refractive index. good too. Alternatively, the operator may input the refractive index of the lens LE obtained in advance using another device. The cup mounting device 1 may be provided with a configuration capable of measuring the refractive index of the lens LE, and the refractive index may be obtained using this. For example, the control unit 70 stores the refractive index of the lens LE acquired in this way in the memory 71 .

<Setting processing conditions and layout (S3)>
For example, when the control unit 70 acquires the target lens shape and the refractive index of the lens LE, the control unit 70 causes the display 2 to display the target lens shape. The operator may operate the input button 3 to set processing conditions for the lens LE for each of the left lens and the right lens. For example, the processing conditions for the lens LE include the type of the lens LE (eg, single focus lens, bifocal lens, progressive lens, etc.), the material of the lens LE, the material of the frame, and various processing (eg, mirror finishing, chamfering, etc.). , grooving, etc.), the mounting position of the cup Cu with respect to the lens LE (for example, the optical center position of the lens LE, the geometrical center position of the lens shape, etc.), and the like. Also, the operator may operate the input button 3 to set the layout of the lens LE. For example, the layout of the lenses LE may be at least one of the frame center distance, the spectacle wearer's interpupillary distance, the spectacle wearer's astigmatic axis angle, and/or the like.

<Shaft striking (S4)>
After setting the processing conditions and layout of the lens LE, the operator places the lens LE (for example, the left lens in this embodiment) on the support pins 14 and attaches the cup Cu to the mounting portion 31 . Also, the operator operates a mode selection button (not shown) to switch from the setting mode to the shaft striking mode. When the axis striking mode is selected, the control section 70 turns on the light source 42 provided in the lens information measuring mechanism 40 . The display 2 also displays a guide mark that serves as a target for aligning the optical center position of the lens LE placed on the support pin 14 (that is, an optical center mark to be described later) with the optical axis L1. .

For example, the control unit 70 obtains the position coordinates of the aperture image captured by the imaging device 51, and based on this, the optical center position and optical characteristics of the lens LE (for example, spherical power, cylindrical power, cylinder axis angle, etc.) to detect For the detection of the optical center position and optical characteristics of the lens LE using the aperture image, a well-known technique is applied. For example, an optical center mark is displayed at the optical center position O of the lens LE detected by the control unit 70 .

Further, for example, the control unit 70 detects the outer shape of the lens LE by performing image processing on the image of the lens LE captured by the imaging device 51 . For example, on the display 2, the lens shape of the lens LE is superimposed on the outer shape of the lens LE. At this time, the target shape of the lens LE is determined by the optical center position O of the lens LE, the layout data of the lens LE, the imaging magnification of the imaging optical system 48, the positional relationship of the optical axis L2 with respect to the optical axis L1, and the like. and display size may be determined.

For example, the operator moves the lens LE so as to align the optical center mark with the guide mark while looking at the display 2, and operates an axis hitting button (not shown) displayed on the display 2. FIG. The control unit 70 drives the X-direction moving mechanism 35 and the Y-direction moving mechanism 36 of the cup mounting mechanism 30 so that the central axis K2 of the cup Cu is positioned at the optical center position O of the lens LE according to the operation signal. to move the arm 32. At this time, if the lens LE has a cylindrical power, the mounting portion 31 may be rotated around the central axis K2 based on the detected astigmatism axis angle. When the position adjustment and angle adjustment of the cup Cu are completed, the control unit 70 drives the Z-direction moving mechanism 37 to lower the arm 32 . As a result, the cup Cu attached to the attachment portion 31 is axially aligned with the front surface of the lens LE placed on the support pins 14 based on the set axis alignment position (that is, the optical center position O of the lens LE). be beaten.

<Acquisition of cross-sectional image data (S5)>
For example, when the operator finishes hitting the cup Cu, the operator operates a mode selection button (not shown) to switch from the hitting mode to the edge information measuring mode. For example, in this embodiment, the edge information of the lens LE mounted on the lens support mechanism 10 is measured. When the edge information measurement mode is selected, the controller 70 turns on the light source 65 of the image data acquisition mechanism 60 .

For example, the control unit 70 controls driving of the Z-direction moving mechanism 63 to align the optical axis L3 with the initial position on the target lens shape TG of the lens LE. For example, the initial position may be a position on a virtual line V1 passing through the optical center position O of the lens LE and extending in the Z direction, or a virtual line V2 passing through the optical center position O of the lens LE and extending in the X direction. It may be in the upper position. Of course, the initial position may be set to any position. For example, in this embodiment, the optical axis L3 is aligned with the point P1, which is on the target lens shape TG of the lens LE and on the imaginary line V1. As a result, the measurement light beam emitted from the light source 65 is divided into a first reflected light beam R1 reflected at the point P1 on the front surface of the lens LE and a second reflected light beam R2 reaching the point Q1 on the rear surface of the lens LE and reflected. , branch to.

Further, for example, the control unit 70 controls the driving of the Y-direction moving mechanism 62 so that the imaging element 69 can receive both the first reflected light flux R1 and the second reflected light flux R2. and the lens LE in the Y direction. For example, the control unit 70 performs image processing (for example, edge detection, etc.) on the cross-sectional image data 75 (see FIG. 9) captured by the imaging device 69 to detect the rising edge of luminance. Further, for example, when the luminance rises twice, the control unit 70 controls the image of the first reflected light beam R1 (that is, the front image data P1s of the lens LE, which will be described later) and the image of the second reflected light beam R2 ( That is, it is determined that both the rear surface image data Q2s) of the lens LE, which will be described later, have been detected, and the driving of the Y-direction moving mechanism 62 is terminated. Thereby, the control unit 70 can acquire the cross-sectional image data 75 of the position of the point P1 in the target lens shape TG of the lens LE.

FIG. 9 is an example of cross-sectional image data 75. As shown in FIG. For example, the cross-sectional image data 75 includes front image data of the lens LE formed by the first reflected light beam R1 and rear image data of the lens LE formed by the second reflected light beam R2. For example, in this embodiment, the image of the point P1 on the front surface of the lens LE becomes the front image data P1s of the lens LE. Further, for example, in this embodiment, the image of the point Q2 on the extension line of the second reflected light flux R2 (that is, on the dotted line shown in FIG. 7) is not the image of the point Q1 on the rear surface of the lens LE, but the image of the point Q2 on the lens LE. , the rear surface image data Q2s. This is because the lens LE has a predetermined refractive index, and the second reflected light flux R2 is bent at the front surface of the lens LE and reaches the imaging device 69. FIG. The position of the point Q1 on the rear surface of the lens LE appears to the image sensor 69 to be the position of the point Q2.

For example, when the control unit 70 acquires the cross-sectional image data 75 at the initial position (that is, the point P1) on the lens LE, the control unit 70 drives the motor 17 to rotate the cylindrical base 11 to rotate the lens placed on the support pins 14. Rotate the LE horizontally once. Further, for example, the control unit 70 controls the Y-direction moving mechanism 62 and adjusts the first reflected light beam R1 to always reach the same position on the light receiving surface of the imaging device 69 . Further, for example, the control unit 70 controls the Z-direction moving mechanism 63 based on the target lens shape TG of the lens LE to move points corresponding to the target lens shape TG of the lens LE (for example, points P2, P3, and P3 shown in FIG. 6). P4, . . . , Pn) are aligned with the optical axis L3. Note that, for example, the points corresponding to the target lens shape may be points spaced at a predetermined angle (for example, 0.5 degrees, 1 degree, etc.) around the optical center position O, or may be arbitrary points. number of points (eg, 1000 points, etc.).

For example, the control unit 70 controls the Z-direction moving mechanism 63 while rotating the lens LE in order to continuously acquire cross-sectional image data 75 for each point on the radial angle of the target lens shape of the lens LE. . Also, for example, the control unit 70 controls the Y-direction moving mechanism 62 while rotating the lens LE so that the front image data P1s of the lens LE is displayed at a predetermined position in the cross-sectional image data 75 . FIG. 14 is a diagram for explaining control for displaying the front image data P1s at a predetermined position. For example, for the cross-sectional image data 75, the control unit 70 detects the shift amount Δd in the depth direction (in other words, the vertical direction of the cross-sectional image data 75) between the front image data P1s of the lens LE and the predetermined position M. do. Further, for example, the control unit 70 calculates the drive amount of the Y-direction moving mechanism 62 based on the detected shift amount Δd, and moves the measurement optical system 61 . As a result, the imaging position of the first reflected light flux R1 reaching the light receiving surface of the imaging element 69 is changed, and the front image data P1s matches the predetermined position M of the cross-sectional image data 75. FIG.

For example, the control unit 70 detects the deviation amount Δd for all radius vector angles in the target lens shape of the lens LE, and drives the Y-direction moving mechanism 62 based on this. That is, the control unit 70 drives the Y-direction moving mechanism 62 every time the position where the cross-sectional image data 75 is acquired on the lens LE is changed, and moves the front image data P1s to the predetermined position M of the cross-sectional image data 75. be displayed. Further, for example, the control unit 70 identifies the front position (for example, position coordinates, etc.) of each radial angle in the target lens shape of the lens LE from the amount of driving the Y-direction moving mechanism 62 based on the shift amount Δd. do. For example, in this case, the front surface position of each radius vector angle may be specified by acquiring the number of pulses of the motor that constitutes the Y-direction moving mechanism 62 . For example, the control unit 70 rotates the lens LE once in the horizontal direction, and acquires cross-sectional image data of all points on radial angles in the target lens shape of the lens LE and the position of the front surface of the lens LE. , are stored in the memory 71 .

Although the lens LE mounted on the support pin 14 is rotated once in this embodiment, it may be rotated any number of times. For example, the lens LE placed on the support pin 14 may be rotated twice, and cross-sectional image data at the bevel position and the chamfer position calculated based on the lens shape of the lens LE may be obtained. For example, in this case, the Z-direction moving mechanism 63 is controlled to rotate the lens LE once so that the optical axis L3 coincides with the position of the bevel on the lens LE. The lens may be further rotated to coincide with the position of the chamfer (for example, the position a predetermined distance inside from the position of the bevel).

<Acquisition of first edge information (S6)>
For example, the cup attachment device 1 may have an edge measurement mechanism for acquiring edge information of the lens LE. For example, the control unit 70 may measure the lens LE by controlling the edge measuring mechanism to acquire edge information. In this case, the control unit 70 may control the edge measuring mechanism based on the target lens shape of the lens LE to acquire edge information. In this embodiment, the image data acquisition mechanism 60 also serves as the edge measurement mechanism, and the control unit 70 acquires edge information.

For example, the control unit 70 acquires edge information (first edge information), which is information about the edge of the lens LE, for each acquired cross-sectional image data 75 . For example, in this embodiment, since the cross-sectional image data 75 is acquired based on the target lens shape of the lens LE, it is possible to acquire the edge information based on the target lens shape of the lens LE. For example, as the edge information, the front position of the edge of the lens LE, the rear surface position of the edge, the thickness of the edge, and the like may be acquired. Of course, as the edge information, the front surface curve value and the rear surface curve value of the lens LE may be obtained. In this embodiment, as the edge information of the lens LE, the case of acquiring the edge thickness will be taken as an example.

For example, the control unit 70 acquires position coordinates (for example, pixel coordinates) of the front image data P1s and the rear image data Q2s on the cross-sectional image data 75 . Also, for example, the control unit 70 uses the pixel coordinates of the front image data P1s and the rear image data Q2s to calculate the interval h between the front image data P1s of the lens LE and the rear image data Q2s of the lens LE. For example, in this case, the control unit 70 may calculate the number of pixels in the interval h by obtaining the difference of each pixel coordinate. Also, in this case, for example, the control unit 70 presets the actual distance per pixel of the imaging element 69, so that the number of pixels of the interval h can be converted into the actual distance.

However, for example, in the cross-sectional image data 75, since the second reflected light flux is bent at the front surface of the lens LE as described above, the interval h between the front surface image data P1s of the lens LE and the rear surface image data Q2s is not necessarily the lens LE edge thickness t. Therefore, for example, the control unit 70 may acquire the edge thickness t of the lens LE based on the refractive index of the lens LE and the cross-sectional image data 75 . For example, in this embodiment, the control unit 70 calculates the actual distance h between the front image data P1s and the rear image data Q2s of the lens LE acquired based on the cross-sectional image data 75, based on the refractive index of the lens LE. , the edge thickness t of the lens LE is obtained. That is, in this embodiment, the edge thickness of the lens LE is obtained by correcting the edge thickness obtained based on the cross-sectional image data based on the refractive index.

For example, the control unit 70 can calculate the edge thickness t of the lens LE by correcting the actual distance h between the front surface image data P1s and the rear surface image data Q2s of the lens LE by using the following formula. .

Here, n is the refractive index of the lens LE, β is the imaging magnification of the light receiving optical system 66, and θ is the tilt angle of the optical axis L4 with respect to the front surface of the lens LE. Note that the photographing magnification β and the tilt angle θ are known values in terms of design. For example, the control unit 70 can obtain the edge thickness t of the lens LE by calling the refractive index n obtained in advance in step S2 from the memory 71 and calculating the above formula. For example, when obtaining the edge thickness t of the lens LE in each cross-sectional image data 75, the control unit 70 associates this with the position of each point on the radial angle of the target lens shape of the lens LE, and stores it in the memory 71. memorize to

Since the front and rear surfaces of the lens LE are curved, the measurement light flux emitted from the light source 65 is not necessarily perpendicular to the front surface of the lens LE. For this reason, the measurement light beam is irradiated obliquely to the front surface of the lens LE, and the measurement light beam traveling from the front surface to the rear surface of the lens LE is bent at the front surface of the lens LE. Therefore, the acquired edge thickness t of the lens LE may be further corrected in consideration of the front curve value of the lens LE.

For example, in this case, a table (conversion table) representing the relationship between the refractive index n of the lens LE and the front curve value is stored in advance in the memory 71, and the control unit 70 converts the corresponding coefficient to the edge thickness t of the lens LE. can be multiplied by The front surface curve value of the lens LE may be obtained in advance using another device and read into the cup attaching device 1, or may be input by the operator. Of course, the front curve value of the lens LE may be obtained by image processing the cross-sectional image data 75 acquired using the cup mounting device 1 .

Note that the formula used to calculate the edge thickness t is not limited to this embodiment, and the refractive index n of the lens LE, the front curve value, and points at each radial angle from the optical center position O (for example, point P1 in FIG. 6 ) as a parameter.

For example, when the operator completes axial striking (step S4), acquisition of cross-sectional image data (step S5), and acquisition of edge information (step S6) for the left lens, the operator similarly performs these steps for the right lens. The edge thickness t corresponding to the position of the target lens shape of the lens LE is obtained.

<Setting of finishing position (S7)>
For example, when the control unit 70 acquires the edge thickness t, it switches the operation screen displayed on the display 2 to a simulation screen, and sets the finishing position. For example, the control unit 70 sets the finishing position of the edge based on the acquired edge information (edge thickness t in this embodiment). For example, the finishing position of the edge includes the position of the bevel formed on the edge, the position of the groove, the position of chamfering, and the like. For example, such a finishing position may be automatically set (that is, initialized) based on the acquired edge thickness t, or may be adjusted by the operator. In this embodiment, the case where the position of the bevel is set as the finishing position of the edge will be taken as an example.

Further, for example, the control unit 70 displays the finishing position based on the edge thickness on the display 2, and based on the operation signal from the input button 3 for adjusting the finishing position on the display, the finishing position is displayed. May be set. In this case, the control unit 70 may display the position of the bevel of the left lens and the position of the bevel of the right lens in a comparable manner. Also, in this case, the control section 70 may set the finishing position of at least one of the left lens and the right lens based on the operation signal from the input button 3 . By doing so, it is possible to consider the difference in edge thickness t between the left lens and the right lens, and arrange the position of the bevel (vertex position of the bevel) with respect to each edge thickness t in a well-balanced manner.

FIG. 10 is an example of the simulation screen 80. As shown in FIG. FIG. 10(a) is a diagram showing the entire simulation screen 80. FIG. FIG. 10(b) is a diagram showing an enlarged part of the simulation screen 80. As shown in FIG. For example, the simulation screen 80 displays the target lens shape of the lens LE (left lens target lens shape TGR and right lens target lens shape TGL). The simulation screen 80 also displays the edge shape of the lens LE after beveling (the left lens edge shape 81L and the right lens edge shape 81R). For example, cursors (cursor 82L and cursor 82R) are displayed on the target lens shape of the lens LE to move on the target lens shape by the operation of the operator. By using the cursor, the operator can specify the observation direction of the edge of the lens LE and display the shape of the edge of the lens LE. Further, for example, on the simulation screen 80, an input for changing the curve value of the bevel curve of the lens LE (that is, the trajectory of the bevel arranged on the edge of the lens LE), the position of the bevel curve in the front-rear direction, the inclination of the bevel curve, etc. Fields 83 (input field 83L and input field 83R) are provided. In this embodiment, the cross-sectional shape of the rim of the frame may be displayed on the simulation screen 80 in correspondence with the display positions of the bevel positions 84L and 84R.

For example, the control unit 70 automatically sets the temporary position of the bevel formed on the lens LE. For example, the bevel curve may be a curve along the front curve of the lens LE. For example, the vertex position of the bevel may be set based on the edge thickness t of the lens LE so as to pass through the half position of the portion where the edge thickness t is the thinnest. For example, the control unit 70 sets the temporary position of the bevel in this manner for each of the left lens and the right lens. At this time, the control unit 70 may automatically adjust the temporary positions of the bevels formed on the left and right lenses in consideration of the difference in edge thickness t between the left and right lenses. For example, in this case, the distance BL from the vertex position of the bevel to the front surface of the lens LE on the left lens and the distance BR from the vertex position of the bevel to the front surface of the lens LE on the right lens are the same. It may be automatically adjusted so that Also, for example, in this case, automatic adjustment may be made so that the difference between the distance BL and the distance BR is equal to or less than a predetermined threshold. For example, the predetermined threshold may be set in advance through experiments or simulations.

For example, the operator operates a determination button (not shown) when there is no problem with the initially set temporary position of the bevel. The control unit 70 creates bevel formation data for forming bevels on the edges of the left lens and the right lens according to the operation instruction, and stores this in the memory 71 . Further, for example, the control unit 70 transfers the created bevel formation data to the lens edge processing device together with the front surface position of the lens LE.

Note that, for example, the operator may manually adjust the initially set provisional position of the bevel. For example, the operator touches the display 2 to move the cursor 82L and specify an arbitrary radius vector angle of the left lens. This allows the operator to determine an observation point that emphasizes the appearance of the positional relationship between the frame and the edge of the lens LE. This also allows the operator to compare the positional relationship between the front surface of the lens LE and the vertex position of the bevel between the left lens and the right lens. Note that the cursor 82R may be automatically moved to a symmetrical position in conjunction with the cursor 82L.

For example, the operator compares the edge shape 81L of the left lens and the edge shape 81R of the right lens, the distance BL from the apex position of the bevel on the left lens to the front surface of the lens LE, and the apex position of the bevel on the right lens. to the front surface of the lens LE, respectively. For example, the vertex position of the bevel can be moved by inputting any value in the input field 83 by the operator. For example, the control unit 70 changes the display positions of the bevel positions 84R and 84L in accordance with the input values. Further, for example, the operator may change the curve value and inclination of the bevel curve by inputting any value in the input field 83 . For example, in this case, the control unit 70 recalculates the positions of the bevel in accordance with the input values, and changes the display positions of the bevel positions 84L and 84R. For example, in this manner, the control unit 70 can set the temporary position of the bevel to be formed on the edge of the lens LE based on the operation signal input from the display 2 by the operator. For example, when the operator finishes adjusting the temporary position of the bevel, the operator operates a determination button (not shown). The control unit 70 creates bevel formation data for forming bevels on the edges of the left lens and the right lens according to the operation instruction, and stores this in the memory 71 . Further, for example, the control unit 70 transfers the created bevel formation data to the lens edge processing device together with the front surface position of the lens LE.

<Lens edge processing device>
For example, the operator uses the cup attaching device 1 to set the position of the bevel to be formed on the edge of the lens LE by the above operation, and then uses the lens edge processing device to process the edge of the lens LE. FIG. 11 is a schematic configuration diagram of the lens edge processing device 90. As shown in FIG. For example, when the operator activates the lens edge processing device 90, the control unit 95 provided in the lens edge processing device receives the aforementioned bevel formation data and the front position of the lens LE, and stores them in a memory (not shown). good too.

For example, the lens peripheral edge processing device 90 in this embodiment includes a lens holding unit 100 that holds the lens LE with a lens chuck shaft 102, an edge information acquisition unit 200 for acquiring edge information of the lens LE, and a peripheral edge of the lens LE. A processing unit 300 and the like are provided for processing. The lens holding unit 100 includes a lens rotating unit 100a for rotating the lens LE, a chuck shaft moving unit 100b for moving the lens chuck shaft 102 in the X-axis direction, and a Y-direction (lens chuck shaft and processing unit) for moving the lens chuck shaft 102. and an inter-axis distance variation unit 100c for moving the unit 300 to the inter-axis distance from the rotating shaft of the unit 300). For the detailed configuration of the lens edge processing device 90, see, for example, Japanese Patent Application Laid-Open No. 2015-131374.

<Lens Holding (S8)>
For example, the operator holds the left lens by the lens chuck shafts 102L and 102R provided in the lens holding unit 100. FIG. For example, the rotation center axis K3 of the lens chuck shafts 102L and 102R is designed to coincide with the center position of the cup Cu (in other words, the optical center position O of the lens LE). Also, for example, the cup Cu is held in a constant direction with respect to the rotation center axis K3. For example, in this embodiment, the cup is arranged so that the virtual line V1 of the lens LE is aligned with the Y direction of the lens rim processing device 90, and the virtual line V2 of the lens LE is aligned with the Z direction of the lens rim processing device 90. Cu is retained. Therefore, the X direction of the cup mounting device 1 corresponds to the Z direction of the lens rim processing device 90 . Also, the Y direction of the cup mounting device 1 corresponds to the X direction of the lens rim processing device 90 . Also, the Z direction of the cup mounting device 1 corresponds to the Y direction of the lens rim processing device 90 .

<Acquisition of Second Edge Information (S9)>
Also, for example, the operator operates a processing start button (not shown) to start processing the peripheral edge of the lens LE. First, the control unit 95 of the lens peripheral edge processing device 90 controls the edge information acquisition unit 200 to obtain edge information (second edge information) of at least one radial angle based on the target lens shape on the front surface of the lens LE. to get For example, in this embodiment, the edge information of the point P1 on the virtual line V1 is acquired.

For example, the controller 95 controls the lens rotation unit 100a, the chuck axis movement unit 100b, and the interaxis distance variation unit so that the stylus 201 included in the edge information acquisition unit 200 contacts the position of the point P1 on the lens LE. 100c is driven to move the lens LE held by the lens chuck shafts 102L and 102R. For example, the control section 95 grasps the positions of the point P1 in the Y direction and the Z direction with reference to the rotation center axis K3, and drives the lens rotation unit 100a and the inter-axis distance variation unit 100c. Also, for example, the controller 95 drives the chuck axis moving unit 100b to move the lens LE in the X direction until a sensor (not shown) provided on the stylus 201 detects contact of the lens LE. For example, at this time, the controller 95 detects the amount of movement of the lens chuck shafts 102L and 102R in the X direction from the initial positions. This makes it possible to grasp where the lens LE is positioned in the axial direction of the lens chuck (that is, the X direction). That is, the position (that is, position coordinates) of the point P1 on the lens LE is grasped. Note that the control unit 95 may acquire edge information on one surface on the radial angle of the lens LE by sliding the tracing stylus 201 on the lens LE.

<Association of Position Coordinates (S10)>
Here, for example, the control unit 95 changes the position coordinates in the X direction of the point P1 of the lens LE acquired by the lens rim processing device 90 to the front position of each point on the lens LE acquired by the cup mounting device 1 (that is, , position coordinates of each point). For example, in this way, the positional coordinates of the lens rim processing device 90 in the X direction are obtained for points after the point P2 on the lens LE. For the point P1 on the lens LE, the X-direction position coordinates of the lens rim processing device 90 have been obtained in step S9. The correspondence of the position coordinates after the point P2 will be described below.

For example, the control unit 95 retrieves the front surface position (position coordinates) of each radius vector angle in the target lens shape of the lens LE from a memory (not shown), and based on the position coordinates of the point P1 on the lens LE, calculates the radius of the lens LE. Position coordinates are associated with each corner. More specifically, for example, the position coordinates of the point P2 on the lens LE in the lens rim processing device 90 are the position coordinates of the point P1 acquired using the lens rim processing device 90 and the point acquired in the cup mounting device 1. and the position coordinates of P2. Further, for example, the position coordinates of the point P3 on the lens LE in the lens rim processing device 90 are the position coordinates of the point P1 obtained as described above using the lens LE rim processing device 90 and the position coordinates obtained in the cup mounting device 1. and the position coordinates of the point P3 obtained by adding. For example, the control unit 95 thus controls the position coordinates of one point on the lens LE acquired using the edge information acquisition unit 200 provided in the lens rim processing device 90, and the image data acquisition mechanism provided in the cup attachment device 1. Position coordinates of points on each radial angle of the lens LE acquired using 60 are associated with each other. As a result, the lens LE held by the lens chuck shaft 102 can correspond to the bevel formation data created by the cup attaching device 1 .

<Acquisition of machining control data (S11)>
For example, the control unit 95 controls the acquired edge information of one point on the lens LE (that is, the second edge information) and bevel formation data (that is, bevel formation data created from the first edge information and the finishing position). and obtain processing control data for processing the peripheral edge of the lens LE. For example, as the processing control data, a drive amount for driving at least one of the lens rotation unit 100a, the chuck axis movement unit 100b, and the interaxis distance variation unit 100c is calculated. Note that the lens LE held by the lens chuck shaft 102 is in a state where the probe 201 is in contact with the point P1. Therefore, in this embodiment, the driving amount from the position where the lens LE contacts the stylus 201 is calculated as the processing control data. Of course, the controller 95 may return the lens chuck shaft 102 to the initial position and calculate the drive amount from the initial position as the processing control data.

<Processing Edge (S12)>
For example, the controller 95 moves the lens chuck shaft 102 in at least one of the X, Y, and Z directions based on the processing control data to position the lens LE on the grindstone 310 of the processing unit 300 . Also, for example, the control unit 95 moves the lens chuck shaft 102 in at least one of the X direction, the Y direction, and the Z direction based on the processing control data, and adjusts the relative positional relationship of the lens LE with respect to the grindstone 310. do. For example, this causes the periphery of the lens LE to be processed (eg, roughed, beveled, etc.). For example, after processing the peripheral edge of the left lens in this manner, the operator causes the right lens to be held by the lens chuck shaft 102 and processes the peripheral edge of the lens LE in the same manner as described above.

As described above, for example, the centering device of the present embodiment sets the centering position, which is the mounting position of the lens holding means that holds the spectacle lens by sandwiching it, with respect to the spectacle lens. and edge information acquiring means for acquiring edge information, which is information relating to the edge of the spectacle lens. As a result, the edge information, which has conventionally been obtained using a lens edge processing device, can now be obtained using an axis alignment device. Therefore, the usage time of the lens rim processing device is shortened, and the time required for manufacturing eyeglasses can be relatively shortened.

Further, for example, the axis alignment device in the present embodiment has an edge measuring means for acquiring edge information of the spectacle lens, measures the spectacle lens by controlling the edge measuring means, and acquires the edge information. As a result, it is possible to measure the edge information of the spectacle lens using the centering device, and it is possible to shorten the operating time of the lens edge processing device.

Further, for example, the centering device in the present embodiment includes a target shape obtaining means for obtaining the target shape of the spectacle lens. As a result, the edge information acquiring means provided in the axis alignment device can control the edge measuring means based on the target lens shape of the spectacle lens, and can acquire positional edge information based on the target lens shape.

Further, for example, the centering device in the present embodiment includes finishing position setting means for setting the finishing position of the edge based on the edge information of the spectacle lens. As a result, the finishing position, which has conventionally been set using a lens edge processing device, can be set using the centering device. Therefore, the usage time of the lens edge processing device is shortened, the waiting time of the lens edge processing device is reduced, and the time required for manufacturing the spectacles can be further shortened.

Further, for example, the alignment device in the present embodiment displays the finish machining position based on the edge information on the display means, and based on the operation signal from the operation means for adjusting the finish machining position on the display means, Set the finishing position. This makes it easier for the operator to grasp the finishing position formed on the spectacle lens. In addition, the operator can easily adjust the finishing position formed on the spectacle lens.

Further, for example, the centering device in the present embodiment displays the finishing position of the left spectacle lens and the finishing position of the right spectacle lens on the display means in a comparable manner, and based on the operation signal from the operation means, A finishing position for at least one of the spectacle lens and the right spectacle lens is set. This makes it easier for the operator to grasp the balance of the finishing positions on the left spectacle lens and the right spectacle lens. Further, the operator can adjust the finishing positions set for the left spectacle lens and the right spectacle lens in consideration of the balance of the finishing positions. Therefore, it becomes easier for the operator to produce good-looking eyeglasses.

Further, for example, the axis alignment device in the present embodiment includes refractive index acquisition means for acquiring the refractive index of the spectacle lens, anterior image data of the anterior surface of the spectacle lens, and posterior image data of the posterior surface of the spectacle lens. An image data acquiring means for acquiring image data, and an edge information acquiring means for acquiring edge information, which is information relating to the edge of the spectacle lens, based on the refractive index and cross-sectional image data. This makes it possible to efficiently acquire the edge information of the spectacle lens by using the cross-sectional image data changed by the refractive index of the spectacle lens.

Further, for example, the axis alignment device in this embodiment includes a light projecting optical system that projects a measurement light beam toward the front surface or the rear surface of the spectacle lens, and a first reflected light beam that is the measurement light beam reflected by the front surface of the spectacle lens. , a second reflected beam of light reflected by the rear surface of the spectacle lens, and a light-receiving optical system for receiving a light-receiving element. Thereby, the image data acquiring means can acquire the cross-sectional image data including the front image data formed by the first reflected light flux and the rear image data formed by the second reflected light flux with a simple configuration. . Further, the image data acquiring means can acquire cross-sectional image data in a non-contact manner using the measurement light flux. Therefore, it is possible to efficiently acquire the edge information of the spectacle lens.

In this embodiment, the axis, which is the mounting position of the lens supporting means for placing the spectacle lens and the lens holding means for sandwiching and holding the spectacle lens for processing the peripheral edge of the spectacle lens, is attached to the spectacle lens. An axis alignment device comprising: axis alignment position setting means for setting the alignment position, the axis alignment position setting means for setting the axis alignment position of the spectacle lens mounted on the lens support means, as a lens shape measuring device It also serves as the role of For example, since the operator can measure the edge information of the spectacle lens in a non-contact manner using the axis alignment device, the edge information of the spectacle lens can be obtained efficiently.

In addition, in this embodiment, the lens peripheral edge processing device having a processing tool for processing the peripheral edge of the spectacle lens held by the lens holding means also serves as a lens shape measuring device. For example, since the operator can measure the edge information of the spectacle lens in a non-contact manner using the lens rim processing device, the edge information of the spectacle lens can be obtained efficiently.

<transformation example>
In this embodiment, as a configuration for holding the lens LE, a configuration in which the lens LE is placed on the support pins 14 has been described as an example, but the configuration is not limited to this. For example, the structure for holding the lens LE may be a structure for sandwiching the lens LE. In this case, a configuration in which the side surface (periphery) of the lens LE is sandwiched, a configuration in which the front surface and the rear surface of the lens LE are sandwiched, and the like can be mentioned.

Further, in the present embodiment, the configuration in which the lens LE mounted on the support pins 14 is rotated by rotating the cylindrical base 11 (in other words, by rotating the support pins 14) has been described as an example. It is not limited to this. For example, when the cup Cu is axially struck on the surface of the lens LE, the mounting portion 31 may be rotated around the central axis K2 without separating the cup Cu and the mounting portion 31 .

In this embodiment, the image data acquisition mechanism 60 acquires a cross-sectional image of the lens LE captured by the imaging element 69, but the configuration is not limited to this. For example, the image data acquisition mechanism 60 may be configured to acquire signal data before acquiring a cross-sectional image.

In this embodiment, the image data acquisition mechanism 60 acquires edge information by correcting the edge information acquired based on the cross-sectional image data 75 based on the refractive index of the lens LE. has been described, but it is not limited to this. For example, the image data acquisition mechanism 60 may be configured to correct the cross-sectional image data 75 based on the refractive index of the lens LE and acquire the edge information of the lens LE based on the corrected cross-sectional image data. Of course, also in this case, the image data acquisition mechanism 60 may further correct the acquired edge thickness t of the lens LE in consideration of the front curve value of the lens LE.

In this embodiment, the image data acquisition mechanism 60 adjusts the irradiation position of the measurement light flux to a position based on the target lens shape TG of the lens LE by rotating the lens LE in the horizontal direction and the Z-direction moving mechanism 63. Although the configuration has been described as an example, it is not limited to this. For example, the image data acquisition mechanism 60 further includes an X-direction movement mechanism for adjusting the position of the measurement optical system 61 in the left-right direction (X-direction). may be adjusted. In this case, the irradiation position of the measurement light flux can be adjusted to a position based on the target lens shape TG of the lens LE without rotating the lens LE in the horizontal direction.

In this embodiment, the Y-direction moving mechanism 62 is driven to move the measurement optical system 61 to determine the front surface position of the edge of the lens LE. However, the present invention is not limited to this. For example, the measurement optical system 61 may be fixed without driving the Y-direction moving mechanism 62 to determine the front surface position of the edge of the lens LE. For example, in this case, the control unit 70 may specify the front position of the edge of the lens LE from the position of the front image data P1s displayed in each cross-sectional image data 75 . Of course, the front position of the edge of the lens LE is determined based on both the amount of movement of the measuring optical system 61 by the Y-direction moving mechanism 62 and the position of the front image data P1s displayed in each cross-sectional image data 75. Any desired configuration may be used.

In this embodiment, the image pickup device 69 included in the image data acquisition mechanism 60 is arranged so that its light receiving surface is perpendicular to the optical axis L4. However, the present invention is not limited to this. . For example, the imaging device 69 may be arranged tiltably. As a result, even if the focal position of the image sensor 69 deviates between the front surface and the rear surface of the lens LE due to the refractive index and front curve value of the lens LE, the focal position can be adjusted by changing the angle of the light receiving surface of the image sensor 69. can be properly matched.

In the present embodiment, the configuration in which the light source 65 provided in the image data acquisition mechanism 60 irradiates the point-like measuring light flux is described as an example, but the present invention is not limited to this. For example, the light source 65 may emit a slit-shaped measurement light beam. In this case, a slit plate and a lens may be provided between the light source 65 and the lens LE to restrict the measurement light flux emitted from the light source 65 to a narrow slit shape and focus the light on the lens LE. As a result, the lens LE is irradiated with a slit-shaped measurement light beam having a predetermined width, so that the imaging element 69 can image the front and rear surfaces of the lens LE having a predetermined width. Further, by image-processing the cross-sectional image data 75 imaged in this way, the front surface curve value and the rear surface curve value of the lens LE can also be obtained.

In this embodiment, the light source 65 provided in the image data acquisition mechanism 60 irradiates a point-like measurement light flux toward one point on the lens LE as an example, but the present invention is not limited to this. For example, the light source 65 may be movably arranged, and a point-like measurement light flux may be scanned in a line. This also allows the imaging device 69 to capture images of the front and rear surfaces of the lens LE with a predetermined width. Therefore, the control unit 70 can image-process the cross-sectional image data 75 and obtain the front surface curve value and the rear surface curve value of the lens LE.

In this embodiment, the image data acquisition mechanism 60 acquires cross-sectional image data 75 for each radial angle of the lens LE, and the control unit 70 acquires edge information based on the cross-sectional image data 75 as an example. Although they have been mentioned and explained, they are not limited to these. For example, for positions for which the cross-sectional image data 75 has not been acquired in the lens LE (for example, positions between points corresponding to the target lens shape, etc.), The edge information at that position may be obtained by performing interpolation using the edge information.

In this embodiment, the light source 65 provided in the image data acquisition mechanism 60 irradiates the measuring light flux to the position based on the target lens shape of the lens LE as an example, but the present invention is not limited to this. For example, it may be configured to be measured at any position on the lens LE. As an example, the light source 65 may irradiate the hole position with the measurement light flux when, for example, the lens surface of the lens LE is drilled. As a result, edge information (for example, edge thickness, etc.) at the hole position of the lens LE and curve values of the front and rear surfaces can be obtained.

For example, the imaging element 69 included in the image data acquisition mechanism 60 may have a good luminance level of the reflected light flux (for example, at least one of the first reflected light flux R1 and the second reflected light flux R2) depending on the curve value of the lens LE. Therefore, the cross-sectional image data 75 of the lens LE may not be obtained with high accuracy. Therefore, for example, the control unit 70 may control the brightness level by controlling the amount of light projected from the light source 65 of the measurement light flux. In this case, the control unit 70 may detect a luminance level (luminance value) from the cross-sectional image data 75 and determine whether the detected luminance level satisfies a predetermined threshold. It should be noted that the predetermined threshold value may be set in advance by experiments, simulations, or the like, such that the brightness level is determined to be good.

For example, the control unit 70 controls (changes) the amount of light projected from the light source 65 based on the determination result. For example, when the control unit 70 determines that the brightness level of the cross-sectional image data 75 does not satisfy a predetermined threshold (for example, smaller than a predetermined threshold), the control unit 70 controls the brightness level of the cross-sectional image data 75 to satisfy the predetermined threshold. Then, the amount of light projected from the light source 65 is increased. Further, for example, when the control unit 70 determines that the brightness level of the cross-sectional image data 75 satisfies a predetermined threshold value (e.g., is equal to or greater than a predetermined threshold value), the control unit 70 does not control the brightness level, and the light source 65 is projected. Maintain light intensity. Of course, even when the control unit 70 determines that the luminance level of the cross-sectional image data 75 satisfies the predetermined threshold value, the luminance level may be controlled so as to obtain a more appropriate luminance level. . As a result, the cross-sectional image data 75 of the lens LE can be obtained with high accuracy corresponding to the lens LE having various curve values.

In this embodiment, the distance h between the front image data P1s and the rear image data Q2s of the lens LE obtained from the cross-sectional image data 75 is corrected based on the refractive index of the lens LE. Although the configuration for obtaining the edge thickness t has been described as an example, the present invention is not limited to this. For example, the edge thickness t of the lens LE may be obtained by correcting the cross-sectional image data 75 based on the refractive index of the lens LE and calculating the interval h between the corrected front image data and the rear image data. Note that the cross-sectional image data 75 is corrected based on at least one of the refractive index of the lens LE, the front curve value of the lens LE, and the distance D from the optical center position O to each radial angle point. good too.

In the present embodiment, the configuration for acquiring the cross-sectional image data 75 and the edge information (for example, the edge thickness t of the lens LE) after the axial striking is performed using the cup mounting device 1 has been described as an example. is not limited to this. In the present embodiment, it is sufficient that the cup mounting device 1 is used to perform axial striking, acquisition of cross-sectional image data 75, and acquisition of edge information. For example, in this case, after obtaining the cross-sectional image data 75 and the edge information, the lens LE may be punched.

In this embodiment, the configuration in which the cup mounting device 1 acquires the edge information of the lens LE using the measurement optical system 61 has been described as an example, but the present invention is not limited to this. For example, the cup mounting device 1 may be configured to have a tracing stylus, and acquire the edge information of the lens LE by bringing the tracing stylus into contact with the lens LE.

Further, in the present embodiment, the configuration for setting the finishing position of the lens LE using the cup mounting device 1 has been described as an example, but the present invention is not limited to this. For example, the finishing position of the lens LE may be set using the lens edge processing device 90 . In this case, for example, the finishing position based on the edge thickness may be displayed on a display (not shown) of the lens edge processing device 90 . Further, for example, the finish machining position may be set based on an operation signal for adjusting the finish machining position. Further, for example, the finishing position of the left lens and the finishing position of the right lens may be displayed so as to be comparable.

In this embodiment, the configuration for acquiring edge information (second edge information) of one point of the radius vector angle based on the target lens shape on the front surface of the lens LE using the lens peripheral edge processing device 90 is taken as an example. has been described, but it is not limited to this. For example, the configuration may be such that the edge information of a plurality of points of the radius vector angle based on the target lens shape is acquired using the lens periphery processing device 90 . In this case, edge information such as four points in total, two points on the virtual line V1 (that is, points P1 and P5 in FIG. 13) and two points on the virtual line V2 are acquired. good too. Thereby, the control unit 95 can predict the deformation and inclination of the lens LE caused by holding the lens LE by the lens chuck shafts 102L and 102R. Note that the case where the lens LE is tilted will be described below as an example.

FIG. 13 shows a state in which the lens chuck shaft 102 holds the lens LE. For example, FIG. 13 represents a cross-section taken by imaginary line V1, in which lens LE is tilted. In FIG. 13, the point P6 is the intersection of the side g1 extending from the point P1 in the direction perpendicular to the rotation center axis K3 and the side g2 extending from the point P5 in the direction parallel to the rotation center axis K3. For example, the control unit 95 causes two points (that is, point P1 and point P5) on the imaginary line V1 of the lens LE to come into contact with the stylus 201 provided in the lens rim processing device 90, and the positional coordinates of each point in the X direction Calculate Subsequently, the control unit 95 calculates the distances of the sides g1 and g2. For example, the control unit 95 obtains the distance of the side g2 from the difference between the coordinate positions of the points P1 and P5 in the X direction. Also, for example, the control unit 95 obtains the distance of the side g1 from the target lens shape of the lens LE. For example, in this embodiment, the distance in the Y direction from the rotation center axis K3 to the point P1 and the distance in the Y direction from the rotation center axis K3 to the point P5 are known from the target lens shape. Based on this, the distance of the side g1 can be calculated.

For example, the control unit 95 calculates the angle α between the side g1 and the line segment connecting the points P1 and P5 using a trigonometric function using the sides g1 and g2. This makes it possible to obtain the angle at which the lens LE is tilted in the vertical direction with respect to the lens chuck shafts 102L and 102R. Further, for example, the control unit 95 also calculates the positional coordinates of two points on the imaginary line V2 of the lens LE in the lens edge processing device 90. can be used to find the angle of inclination in the horizontal direction. For example, the control unit 95 may correspond the bevel formation data created by the cup attaching device 1 to the lens LE held by the lens chuck shaft 102 in consideration of these tilt angles. .

In this embodiment, the cup mounting device 1 has an edge measuring mechanism, and the edge information is obtained by controlling the edge measuring mechanism to measure the lens LE. is not limited to For example, the cup attaching device 1 may be configured to acquire edge information from another device without having an edge measuring mechanism.

In this embodiment, in the setting of the finishing position in step S7, initial setting and automatic adjustment of the provisional position of the bevel by the control unit 70 and manual adjustment of the provisional position of the bevel by the operator are performed. Although described as an example, it is not limited to this. For example, at least one of these settings and adjustments may be performed. Of course, these settings and adjustments may be configured to be performed in combination.

1 cup attachment device 2 display 10 lens support mechanism 20 frame shape measurement mechanism 30 cup attachment mechanism 40 lens information measurement mechanism 60 image data acquisition mechanism 70 control unit 71 memory 75 cross-sectional image data 80 simulation screen 90 lens edge processing device 100 lens holding unit 102 lens chuck shaft 200 edge information acquisition unit 300 processing unit

Claims (4)

An axis alignment device for processing the peripheral edge of a spectacle lens,
a lens support means for placing the spectacle lens;
A cup attached to the surface of the spectacle lens mounted on the lens support means for holding the spectacle lens by means of lens holding means for sandwiching and holding the spectacle lens when the peripheral edge of the spectacle lens is processed. attachment means;
has
a refractive index obtaining means for obtaining the refractive index of the spectacle lens;
An image for acquiring cross-sectional image data including front image data on the front surface of the spectacle lens and rear surface image data on the rear surface of the spectacle lens in a step before the spectacle lens is held by the lens holding means data acquisition means;
edge information acquiring means for acquiring edge information, which is information relating to the edge of the spectacle lens, based on the refractive index and the cross-sectional image data;
An axis alignment device comprising: In the axial alignment device of claim 1,
a light projecting optical system that projects a measurement light beam toward the front surface or the rear surface of the spectacle lens;
a light-receiving optical system for receiving a first reflected light beam obtained by reflecting the measurement light beam from the front surface of the spectacle lens and a second reflected light beam obtained by reflecting the measurement light beam from the rear surface of the spectacle lens by a light receiving element; , and
The image data acquiring means acquires the cross-sectional image data including the front image data formed by the first reflected light flux and the rear image data formed by the second reflected light flux. Axis alignment device . The axis alignment device according to claim 1 or 2,
The edge information acquiring means corrects the cross-sectional image data based on the refractive index, and acquires the edge information based on the corrected cross-sectional image data . The axis alignment device according to claim 1 or 2,
The edge information acquiring means acquires the edge information by correcting the edge information acquired based on the cross-sectional image data based on the refractive index.

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