JP2009217104A - Inspection device and inspection method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inspection device that enables an operator to satisfactorily confirm whether a lens is appropriately held in a holding tool for attaching the lens to a lens shape processing device, even in a spectacle lens that has an astigmatism axis which is near to 45°. <P>SOLUTION: The spectacle lens L has a reference mark 40, linearly provided continuously or intermittently, to show a reference line. The inspection device 50 has an attaching part 51 detachably attached to the holding tool 30 holding the lens L, and a transparent and flat reference plate 52 spread to be opposed to the lens L from the attaching part 51. The reference plate 52 is equipped with a collation mark 60, which is linearly provided continuously or intermittently to show a reference line for lens shape processing of the holding tool 30 attached to the attaching part 51, which is the collation mark 60 for collating with the reference mark 40 of the lens L, by being transmitted through the reference plate 52. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an inspection apparatus and an inspection method for inspecting whether or not a spectacle lens is properly held by a holder used for mounting a spectacle lens on a target lens shape processing apparatus. .

  When the spectacle lens is framed in the spectacle frame, so-called edging is performed in which the peripheral portion of the spectacle lens is ground in accordance with the frame shape of the spectacle frame. As a method of processing a lens for spectacles in a target lens processing apparatus, the lens is held in a holder by holding the lens in a holder before the target lens processing, and then the lens is placed in the target lens processing apparatus. There is known a method of mounting a mold processing apparatus and processing a target lens. The holding of the lens in the holder is performed by an operation called blocking. The blocking is performed, for example, by fixing the holder and the lens to each other via an adhesive tape.

  A lens for spectacles has an astigmatism power and an addition power, and is not rotationally symmetric with respect to the optical axis, that is, is often not equivalent around the optical axis. Therefore, when processing a lens for spectacles, the position in the optical axis rotation direction (lens axis), for example, the level when the lens is mounted is accurately adjusted to the reference line determined by the spectacle prescription and progressive lens type. Need to be processed. However, if the lens is held by the holder while the optical axis rotation direction position is inclined with respect to the reference line (horizontal) in the target lens shape processing at the time of blocking, the lens is in an appropriate position for the target lens processing device. (Position) will not be worn. In this case, when the lens processed by the target lens shape processing apparatus is attached to the spectacle frame, the horizontal of the spectacle lens in the frame does not match the reference line (horizontal) of the lens before processing, and the desired performance is obtained. May not be obtained. Therefore, in order to prevent the manufacture of such a defective product, it is preferable to check the holding state of the lens in the holder after blocking and before processing the target lens shape.

  Patent Document 1 discloses a spectacle lens mounting position inspection instrument for inspecting the mounting position of a spectacle lens to a spectacle lens holding portion in a lens shape processing apparatus for grinding a peripheral portion of the spectacle lens held by the spectacle lens holding portion. ing. In this inspection instrument, a collation mark for collation with a reference mark of a lens provided in advance on the spectacle lens is formed on the instrument main body to which the spectacle lens holding portion with the spectacle lens attached is mounted.

In this inspection instrument, the spectacle lens is positioned between the instrument body on which the verification mark is formed and the eyes of the observer, the spectacle lens is transmitted, and the reference mark of the spectacle lens and the verification mark of the instrument body Is matched. If the reference mark on the spectacle lens and the reference mark on the instrument body match the correct position relationship between the reference mark on the spectacle lens and the reference mark on the instrument body, the spectacle lens is in the correct position on the spectacle lens holder. It can be confirmed that it was blocked. In this state, by attaching the spectacle lens to the target lens shape processing apparatus via the spectacle lens holder, the spectacle lens is held in an accurate position (posture) by the target lens shape processing apparatus.
JP 2006-220713 A

  In a lens whose astigmatic axis prescription is far from 45 °, the reference mark of the instrument body viewed through the lens is not refracted much. However, in the case of a lens with an astigmatism axis prescription close to 45 ° (a lens with oblique axis astigmatism), the reference mark of the instrument body viewed through the lens is refracted and easily bent and visible.

  Further, in glasses called a wrap-around type, the lens has a large curve along the roundness of the face. When such a lens is inspected with the above-described inspection instrument, the distance between the reference mark on the lens and the reference mark on the instrument body is relatively large. In the case of a lens in which there is a distance between the reference mark on the lens and the reference mark on the instrument body, the reference mark on the instrument body viewed through the lens is refracted and is easily bent and visible.

  In these cases, since the reference mark of the lens is checked against the bent reference mark, it is necessary to accurately determine whether the reference mark of the lens and the reference mark of the instrument body are in an appropriate positional relationship. Becomes difficult.

  One embodiment of the present invention is an inspection apparatus (inspection instrument) for confirming a state in which a lens is attached to a holder for attaching a lens for spectacles to a target lens shape processing apparatus. The lens has a reference line of the lens, for example, a reference mark provided continuously or intermittently so as to indicate the horizontal level when the lens is mounted. This inspection apparatus has a mounting portion that can be attached to and detached from a holder that holds a lens, and a transparent and flat reference plate that extends from the mounting portion so as to face the lens. In this inspection apparatus, the reference plate is a reference line for processing the target lens shape of the holder attached to the attachment portion, for example, a reference mark provided continuously or intermittently so as to indicate horizontal, and passes through the reference plate. And a reference mark for checking with a reference mark of the lens.

  According to this inspection apparatus, since the reference plate is transparent and flat, the reference plate on which the reference mark is formed is positioned between the lens and the observer's eyes, and the reference plate is transmitted through. Thus, the reference mark of the lens can be verified with the verification mark. That is, the reference mark of the lens can be compared with the reference mark of the reference plate with a visual ray that does not pass through the lens (not affected by the light refraction effect of the lens). Therefore, the reference mark is not refracted by the lens and does not appear to be bent. For this reason, whether or not the lens is properly held by the holder for mounting on the target lens shape processing apparatus, even if the lens has an astigmatic axis close to 45 ° or a lens used for spectacles called a wraparound type. Can be accurately determined.

  The reference mark may be a mark provided linearly continuously or intermittently to indicate a reference line. That is, the reference mark may be not only a straight line but also a dot, a broken line, a symbol, or a combination thereof. Similarly, the reference mark may be a mark that is linearly continuously or intermittently provided so as to indicate a reference line for target processing of the holder. That is, the collation mark may be not only a straight line but also a dot, a broken line, a symbol, or a combination thereof. An example of the verification mark is a verification line. When the verification mark is a verification line, a plurality of verification lines are preferably arranged in parallel to each other.

  Another aspect of the present invention is a method for confirming, using an inspection apparatus, a state in which the lens is attached to a holder for mounting a spectacle lens on the target lens shape processing apparatus. The lens has a reference mark (reference mark) provided continuously or intermittently to indicate the reference line of the lens. The inspection apparatus includes a mounting portion that can be attached to and detached from a holder (holding portion) that holds a lens, and a transparent and flat reference plate that extends from the mounting portion so as to face the lens. The reference plate is provided with a verification mark that is provided continuously or intermittently so as to indicate the reference line of the target lens processing of the holder attached to the attachment portion. The method includes collating the reference mark of the lens with the reference mark through the reference plate.

  According to this method, since the reference mark of the lens is collated with the collation mark through the reference plate, the reference mark of the lens can be collated with the collation mark of the reference plate with a visual ray that does not pass through the lens.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. First, the configuration of the target lens shape processing apparatus will be described. FIG. 1 is a perspective view showing an example of a target lens shape processing apparatus. FIG. 2 is an enlarged view showing a state where a lens for spectacles is attached to the target lens shape processing apparatus of FIG.

  This target lens processing apparatus 1 processes a target lens L having a substantially circular shape prior to target lens processing in accordance with the frame shape, and uses the lens L as a lens (spectacle lens) according to the frame shape. It is. As the lens L for spectacles before processing the target lens shape, for example, a lens whose surface is subjected to super water-repellent processing is used. A lens L held by the holder 30 is attached to the target lens processing device 1 via the holder 30.

  The target lens processing apparatus 1 includes an apparatus main body (manufacturing apparatus main body) 2 and a casing (not shown) that covers the apparatus main body 2. The apparatus main body 2 controls the main base 21, the sub base 22 installed on the main base 21, the lens driving device 23, the lens processing device 24, the lens driving device 23 and the lens processing device 24. Device (not shown).

  The main base 21 is a flat plate base, and the sub base 22 is installed on the main base 21. The sub base 22 has a substantially inverted side T-shape, and includes a base 221 installed on the main base 21 and a wall 222 provided on the base 221. The wall portion 222 has a substantially rectangular shape in front, and is arranged such that the long side is along the X axis.

  The lens driving device 23 sandwiches the lens L and rotationally drives the lens L. The lens driving device 23 includes an upper chuck portion 231 and a lower chuck portion 232. The upper chuck portion 231 and the lower chuck portion 232 face each other with the lens L interposed therebetween. The upper chuck portion 231 includes a holding cylinder 231A. The holding cylinder 231A is, for example, a pneumatic cylinder, and includes a cylindrical cylinder body 231B and a shaft member 231C. The cylinder main body 231B is attached to the wall portion 222 of the sub base 22 via the holder 231D. Although not shown, a bearing is provided inside the holder 231D, and the holding cylinder 231A is rotatably held. The holder 231 </ b> D is fixed to a substantially central portion of the front surface of the wall portion 222.

  The shaft member 231C extends along the thickness direction of the lens L, and moves along the vertical direction (Z direction) in the cylinder body 231B. The shaft member 231C abuts on the surface of the lens L (upper surface, in this example, the concave surface Sb), and holds the lens L together with another shaft member 232D described later. For example, a rubber lens retainer 231C1 is attached to the tip of the shaft member 231C. In such a holding cylinder 231A, the air pressure inside the cylinder main body 231B is adjusted by sliding a shaft member 231C by controlling a solenoid valve (not shown).

  The lower chuck portion 232 includes a turntable 232A installed on the base 221 of the sub-base 22 and a cylinder 232B installed on the turntable 232A. The turntable 232A rotationally drives a cylinder 232B installed on the turntable 232A. The turntable 232A includes a planar circular turntable body 232A1 and a rotating shaft 232A2 extending downward from the turntable body 232A1. is doing. A concave notch (not shown) is provided on the back surface of the main base 21 in accordance with the installation position of the turntable 232A.

  The rotary shaft 232A2 penetrates the surface of the main base 21 and reaches the above-described concave notch. A gear (not shown) that meshes with the rotating shaft 232A2 is disposed in the concave cutout. This gear meshes with the rotating shaft of the motor 232E. Therefore, the turntable 232A is rotationally driven by the drive of the motor 232E. Thereby, the cylinder 232B on the turntable 232A is rotationally driven, and the lens L is also rotationally driven. Furthermore, means (not shown) for recognizing the rotation speed and rotation angle of the turntable 232A is provided inside the concave notch. Examples of such means include an encoder including a photosensor and a light shielding plate.

  The cylinder 232B has substantially the same structure as the holding cylinder 231A, and includes a cylinder body 232C and a shaft member 232D that slides inside the cylinder body 232C. The shaft member 232D extends along the thickness direction of the lens L, and supports the surface of the lens L (the lower surface, in this example, the convex surface Sa) from below. The shaft member 232D is disposed to face the shaft member 231C described above, and the lens L is sandwiched between the shaft member 231C and the shaft member 232D.

  As shown in FIG. 2, the shaft member 232D includes a shaft member main body 232D1 that slides inside the cylinder main body 232C, and a mounting portion 232D2 attached to the tip of the shaft member main body 232D1. The mounting portion 232D2 includes a columnar base end portion 232D21 and a distal end portion 232D22 in which a fitting hole 232D20 into which the holder 30 holding the lens L is fitted is formed. A holder 30 that holds the lens L is detachably attached to the mounting portion 232D2 in a state in which rotation is suppressed. By attaching the holder 30 to the mounting portion 232D2, the lens L is relative to the target lens processing device 1 in the optical axis rotation direction position (lens axis), that is, the reference line of the lens L and the target for target lens processing. It is held in a posture where the line coincides. That is, the holder 30 includes a portion (latching portion 32 described later) that meshes with the shaft key of the mounting portion 232D2 and whose position, angle, or posture with respect to the mounting portion 232D2 is determined.

  As described above, the rotation angle of the mounting portion 232D2 when processing the target lens shape is monitored by the encoder of the turntable 232A, and is controlled so as to perform target lens processing into a predetermined shape. Therefore, the lens L can be formed into a desired shape by attaching the lens L to the holder 30 in a predetermined posture. In many cases, the reference line provided on the lens L indicates the horizontal when the user wears the lens L. The shape of the target lens shape is also determined based on the horizontal of the frame when the user wears it. Therefore, the lens L is attached to the target lens shape processing apparatus 1 via the holder 30 so that the reference line (horizontal) of the lens L and the target reference shape (horizontal) of the target lens processing coincide with each other. Thus, it is possible to process (manufacture) a spectacle lens in which the horizontal level of the frame and the horizontal level of the lens match when mounted on the frame.

  The lens processing device 24 grinds the lens L, and includes a pair of grinding units 241 and a pair of moving units (grinding wheel moving units) 242 that move the respective grinding units 241. The pair of grinding parts 241 are disposed opposite (symmetrically disposed) with the lens driving device 23 interposed therebetween. Each of the grinding units 241 includes a grindstone 241A, a grindstone shaft 241B connected to the grindstone 241A, a grindstone shaft rotation drive unit 241C that rotationally drives the grindstone shaft 241B, and a base body 241D. The grindstone 241A includes a plurality of (for example, three) grindstone main bodies 241A1, 241A2, and 241A3 having a cylindrical shape. The grindstone main bodies 241A1 to 241A3 are overlapped with each other along the Z-axis direction.

  The grindstone main body 241A1 disposed at the lowermost of the grindstone main bodies 241A1 to 241A3 is used when the lens L is roughly processed. The grindstone main body 241A2 disposed on the grindstone main body 241A1 is used when finishing the lens L. The grindstone main body 241A2 is a finer mesh than the grindstone main body 241A1. As the grindstone body 241A2, for example, a diamond sintered body can be used. The grindstone main body 241A3 disposed on the grindstone main body 241A2 is used when the outer peripheral end surface of the lens L is mirror-finished.

  The lower end of the grindstone shaft 241B is connected to the upper surface of the grindstone 241A. The grindstone 241A is held by the grindstone shaft 241B. The upper end of the grindstone shaft 241B passes through the base body 241D and is fixed to a pulley 241C3 provided on the upper surface of the base body 241D. A grindstone shaft rotation driving unit 241C is provided on the upper surface of the base 241D. The grindstone shaft rotation drive unit 241C includes a motor 241C1 for rotationally driving the grindstone shaft 241B, a pulley 241C4 attached to the rotation shaft of the motor 241C1, the pulley 241C3 fixed to the upper end of the grindstone shaft 241B, and these A belt 241C2 wound between pulleys 241C3 and 241C4.

  Therefore, when the motor 241C1 is driven, the pulley 241C4 attached to the rotation shaft of the motor 241C1 rotates. This rotation drives the belt 241C2, and the pulley 241C3 fixed to the upper end of the grindstone shaft 241B rotates. Thereby, the grindstone shaft 241B rotates.

  Each of the pair of moving parts 242 moves the grinding part 241. These moving units 242 move the grindstone 241 </ b> A of the grinding unit 241 closer to and away from the lens L fixed to the lens driving device 23. These moving parts 242 are arranged oppositely (symmetrically arranged) with the lens driving device 23 interposed therebetween.

  A specific configuration of the eyeglass lens L and the holder 30 is shown in FIG. FIG. 3A shows a state in which the spectacle lens L is held by the holder 30 with a plan view (a view seen from the convex side). FIG. 3B is a side view showing a state in which the eyeglass lens L is held by the holder 30.

  On the lens L for spectacles, a reference mark (reference mark) 40 that is linearly provided continuously or intermittently so as to indicate the horizontal is provided in advance by a method such as printing. The reference mark 40 can be removed later by cleaning or the like. In this example, the reference mark 40 is printed on the convex surface Sa of the lens L. Further, the reference mark 40 of this example is provided linearly and intermittently. More specifically, the reference mark 40 of this example includes a cross-shaped symbol 41 indicating the center C, a reference straight line 42 extending in the radial direction of the lens L around the cross-shaped symbol 41, and a reference straight line 42. And dots 43 provided therebetween. The dots 43 are printed at equal intervals from the cross-shaped symbol 41 with the cross-shaped symbol 41 interposed therebetween.

  Usually, the lens L is held by the holder 30 by fixing the holder 30 to the center C of the lens L. The holder 30 may be fixed at a position shifted from the center C of the lens L. When the holder 30 is fixed (blocked) to the lens L, an adhesive tape T is applied to the surface of the lens L (the convex surface Sa in this example), and the lens L and the holder 30 are interposed via the adhesive tape T. And fix.

  The holder 30 is made of rubber or the like, for example. The holder 30 includes a holder main body 31 on the lens L side, and an engaging portion 32 formed integrally with the holder main body 31. The locking portion 32 is detachably fitted into the fitting hole 232D20 of the mounting portion 232D2 of the lens driving device 23. The lens L is mounted on the lens driving device 23 of the target lens shape processing apparatus 1 by inserting (fitting) the holder 30 holding the lens L for spectacles into the fitting hole 232D20 of the mounting portion 232D2.

  Further, the mounting portion 232D2 is formed with a detent so that the holder 30 does not rotate relative to the mounting portion 232D2. Specifically, the groove portion 33 is formed in the horizontal direction in the locking portion 32 of the holder 30, and the shaft key (not shown) is formed in the mounting portion 232D2. By fitting the groove portion 33 and the shaft key, the holder 30 is prevented from rotating with respect to the mounting portion 232D2. Therefore, the lens L is held with respect to the target lens shape processing apparatus 1 in a posture determined so that the optical axis rotation direction position (lens axis) faces a predetermined direction (typically, the direction of the axis key). The

  Next, an inspection apparatus (lens mounting position inspection apparatus, lens mounting position inspection instrument) according to an embodiment of the present invention will be described. FIG. 4 shows a state where the inspection device 50 is mounted on the holder 30 holding the lens L for spectacles, in an exploded perspective view seen from the concave surface Sb side of the lens L. FIG. 5 shows an exploded perspective view of a state in which the inspection device 50 is mounted on the holder 30 holding the spectacle lens L as seen from the convex surface Sa side of the lens L. FIG.

  This inspection device 50 is for inspecting the attachment position of the holder 30 with respect to the lens L, and the holder 30 holding the lens L is attached thereto. Specifically, the inspection device 50 includes a mounting portion 51 that can be attached to and detached from the holder 30 that holds the lens L, and a transparent and flat reference plate 52 that extends from the mounting portion 51 so as to face the lens L. have. The reference plate 52 is made of a transparent acrylic resin or the like. The mounting portion 51 is separate from the reference plate 52, and is formed of, for example, a highly durable metal such as aluminum, and is fixed to the surface 52a of the reference plate 52 opposite to the lens L. Note that the attachment portion 51 may be formed integrally with the reference plate 52 by a transparent member such as acrylic resin. As in this example, when the attachment portion 51 is separate from the reference plate 52, the attachment portion 51 may be transparent or opaque.

  The attachment portion 51 is a substantially cylindrical member that is smaller than the diameter of the reference plate 52. The front end surface 51 a of the attachment portion 51 is a plane parallel to the reference plate 52. The surface 51b on the reference plate 52 side of the attachment portion 51 may be a flat surface parallel to the reference plate 52 or a tapered surface extending toward the reference plate 52 side. In the center of the attachment portion 51, an opening 51c into which the locking portion 32 of the holder 30 is fitted is provided.

  Further, a groove 51d is formed on the distal end surface 51a of the mounting portion 51 along the horizontal direction (in the direction in which a collation mark 60 described later extends and in the direction in which the missing portion 52d extends). The groove 51d is provided so as to pass through the center of the opening 51c. The groove 51d is formed corresponding to the groove 33 of the holder 30. When the holder 30 holding the lens L is attached to the inspection device 50, that is, when the engaging portion 32 is fitted into the opening 51c, the groove 51d of the attachment 51 and the groove 33 of the holder 30 are The rod-like key 70 (see FIG. 5) is fitted at the same time. The groove part 33 of the holder 30 is a part that determines the posture of the holder 30 and the mounting part 232D2 by fitting with the shaft key of the mounting part 232D2. Therefore, by fixing the groove 51d of the mounting portion 51 of the inspection apparatus 50 and the groove 33 of the holder 30 with the key 70, the state (posture) in which the lens L is attached to the target lens shape processing apparatus 1 by the holder 30. Can be simulated or reproduced.

  The reference plate 52 has substantially the same diameter as the lens L, and is provided with a pair of linear deficient portions 52d at the peripheral portion of the reference plate 52 facing each other, for example, an upper portion and a lower portion. Yes. That is, the pair of deficient portions 52d are formed in parallel to each other. In addition, an opening 52c through which the holder 30 passes is provided in the center of the reference plate 52. The diameter of the opening 52c is larger than the diameter of the opening 51c. Further, the center of the opening 51 c of the attachment portion 51 and the center of the opening 52 c of the reference plate 52 are respectively on a perpendicular line passing through the center of the reference plate 52.

  On the surface of the reference plate 52, in this example, the surface 52b facing the lens L (the surface opposite to the attachment portion 51) 52b, a verification mark 60 is provided by printing, engraving, or the like. Are provided linearly continuously or intermittently so as to indicate the direction of the groove 33 of the holder 30 attached to the attachment part 51. As described above, the groove portion 33 of the holder 30 indicates the reference line for the target lens processing of the target lens processing apparatus 1, and in many cases indicates the horizontal when the spectacle lens is attached. The collation mark 60 may be provided on a surface (surface on the attachment portion 51 side) 52a opposite to the lens L.

  Therefore, in the inspection apparatus 50, the reference line of the lens processing is matched with the reference line of the lens L by collating the reference mark 60 with the reference mark 40 of the lens L through the reference plate 52. Can be inspected. In other words, the collation mark 60 is a mark for passing through the reference plate 52 and collating with the reference mark 40 of the lens L. The collation mark 60 in this example is a plurality of collation lines 61 parallel to each other. These verification lines 61 are formed from the inner peripheral edge to the outer peripheral edge of the reference plate 52 in parallel with the missing portion 52d. One of the plurality of reference lines 61 is provided so as to pass through the center of the opening 52 c and coincide with the groove 33. The other verification lines 61 are parallel to the single verification line 61 and are provided at equal intervals. The collation mark 60 is not limited to a plurality of collation lines, and indicates a reference line for processing the target lens shape of the holder 30 attached to the attachment portion 51, and passes through the reference plate 52 to be a lens. Any material that can be matched with the L reference mark 40 may be used.

  Next, a method for confirming the state in which the lens L is held by the holder 30 for mounting the eyeglass lens L on the target lens shape processing apparatus 1 using the inspection apparatus 50 will be described. FIG. 6A is a front view showing a state where the reference mark 40 of the spectacle lens L is collated with the collation mark 60 of the inspection apparatus 50. FIG. 6B shows a state in which the reference mark 40 of the eyeglass lens L is collated with the collation mark 60 of the inspection apparatus 50 by a plan view (top view).

  Prior to the inspection, the lens L is attached to the holder 30 by blocking. After this blocking, the mounting position of the lens L on the holder 30 is inspected using the inspection device 50.

  The locking portion 32 of the holder 30 to which the lens L is attached is inserted into the opening 51c of the attachment portion 51 of the inspection apparatus 50, and the convex surface Sa of the lens L is brought into contact with the surface 52b of the reference plate 52. A gap may be provided between the convex surface Sa of the lens L and the surface 52b of the reference plate 52. The lens L is rotated with respect to the inspection device 50 so that the groove portion 51d provided in the mounting portion 51 of the inspection device 50 and the groove portion 33 of the holder 30 are aligned with each other. Then, the key 70 is inserted into the grooves 51d and 33.

  In this state, the reference plate 52 is transmitted from the inspection device 50 side, and the reference mark 40 of the lens L is compared with the verification mark 60 of the reference plate 52 of the inspection device 50. In this collation operation, it is determined whether or not the reference mark 40 is coincident (or parallel) with the collation mark 60. At this time, the determination may be made including whether or not the dots 43 constituting the reference mark 40 are in symmetrical positions.

  In this inspection method, the reference mark 40 of the lens L can be compared with the reference mark 60 of the reference plate 52 with a visual ray that does not pass through the lens L (not affected by the light refraction effect of the lens L). Accordingly, the reference mark 60 is not refracted by the lens L and does not appear to be bent, and the lens L is held even in a lens having an astigmatic axis close to 45 ° or a lens used for spectacles called a wrap-around type. Whether or not the tool 30 is properly held can be determined well.

  As a result of the collation, if the reference mark 40 and the collation mark 60 are coincident or substantially coincident, the reference line of the lens L and the reference line of the holder 30 are coincident or parallel without being inclined during blocking, It can be seen that the lens L is accurately attached to the holder 30. Therefore, by attaching the holder 30 to the target lens shape processing apparatus 1, the lens L is held by the target lens shape processing apparatus 1 at an accurate position (posture). Typically, the lens L is held in a posture in which the optical axis rotation direction position (lens axis) faces a predetermined direction (in this example, the direction of the axis key of the mounting portion 232D2). Match or parallel. Thereby, the lens L can be processed into a target lens as designed in the target lens processing apparatus 1.

  As a result of the collation, if the reference mark 40 and the collation mark 60 do not coincide with each other, it means that the lens L is attached to the holder 30 with the optical axis rotation direction position inclined. In such a case, the lens L is removed from the holder 30 by an appropriate means, and blocking is performed again. For this reason, it is possible to prevent defective processing from being performed in the target lens processing device 1.

  Thus, according to the inspection apparatus 50 and the inspection method, the reference mark 40 of the lens L is not collated with the collation mark 60 with the line of sight transmitted through the lens L, but the reference of the lens L with the line of sight not transmitted through the lens L. The mark 40 is collated with the collation mark 60. For this reason, at the time of collation, the collation mark 60 is not refracted by the lens L and does not appear to be bent. Therefore, even if the lens has an astigmatic axis close to 45 ° or a lens used for spectacles called a wrap-around type, it can be well determined whether or not the lens L is properly held by the holder 30.

The perspective view which shows an example of a target lens shape processing apparatus. The figure which expands and shows the state by which the lens for spectacles was mounted | worn with the target lens shape processing apparatus of FIG. (A) is a top view which shows the state by which the lens for spectacles was hold | maintained at the holder. (B) is a side view showing a state in which a lens for spectacles is held by a holder. The disassembled perspective view which looked at the state which mounts | wears with the test | inspection apparatus to the holder holding the lens for spectacles from the concave surface side of this lens. The disassembled perspective view which looked at the state which mounts | wears with the test | inspection apparatus to the holder holding the lens for spectacles from the convex surface side of this lens. (A) is a front view which shows the state which is collating the reference | standard mark of the lens for spectacles with the collation mark of an inspection apparatus. (B) is a top view which shows the state which is collating the reference | standard mark of the lens of spectacles with the collation mark of an inspection apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lens processing apparatus, 30 Holder 40 Reference mark, 50 Inspection apparatus 51 Attaching part, 52 Reference board 60 Reference mark, 61 Reference line L Lens for spectacles

Claims (4)

An inspection device for confirming a state in which the lens is held by a holder for mounting the lens for spectacles on the target lens shape processing apparatus,
The lens has a reference mark provided continuously or intermittently to indicate a reference line of the lens,
The inspection device
A detachable mounting portion for holding the lens;
A transparent and flat reference plate extending from the mounting portion so as to face the lens;
The reference plate is a reference mark that is continuously or intermittently provided so as to indicate a reference line for target processing of the holder attached to the attachment portion, and passes through the reference plate and passes through the reference plate. An inspection apparatus comprising a reference mark for checking with the reference mark.   The inspection apparatus according to claim 1, wherein the verification mark is a verification line.   3. The inspection apparatus according to claim 2, wherein a plurality of the verification lines are arranged in parallel to each other. A method for confirming a state in which the lens is held by a holder for attaching a lens for spectacles to a target lens shape processing apparatus, using an inspection device,
The lens has a reference mark provided continuously or intermittently to indicate a reference line of the lens,
The inspection device includes:
A detachable mounting portion for holding the lens;
A transparent and flat reference plate extending from the mounting portion so as to face the lens;
The reference plate includes a reference mark that is continuously or intermittently provided so as to indicate a reference line for processing the target lens shape attached to the attachment portion,
The method is
An inspection method comprising: passing through the reference plate and collating a reference mark of the lens with the collation mark.

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