WO2021059439A1 - Table de montage pour lentille à vérifier et dispositif de vérification de lentille - Google Patents

Table de montage pour lentille à vérifier et dispositif de vérification de lentille Download PDF

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Publication number
WO2021059439A1
WO2021059439A1 PCT/JP2019/037904 JP2019037904W WO2021059439A1 WO 2021059439 A1 WO2021059439 A1 WO 2021059439A1 JP 2019037904 W JP2019037904 W JP 2019037904W WO 2021059439 A1 WO2021059439 A1 WO 2021059439A1
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WO
WIPO (PCT)
Prior art keywords
lens
light
checker
condenser
optical system
Prior art date
Application number
PCT/JP2019/037904
Other languages
English (en)
Japanese (ja)
Inventor
小出　珠貴
Original Assignee
株式会社レクザム
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社レクザム filed Critical 株式会社レクザム
Priority to JP2019553589A priority Critical patent/JP6710814B1/ja
Priority to PCT/JP2019/037904 priority patent/WO2021059439A1/fr
Publication of WO2021059439A1 publication Critical patent/WO2021059439A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
    • G01M11/02—Testing optical properties
    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C13/00—Assembling; Repairing; Cleaning

Definitions

  • the present invention relates to a lens mounting table to be inspected and a lens checker.
  • Patent Document 1 proposes a lens checker including a hidden mark observation system for observing the hidden mark.
  • the hidden mark is generally stamped near the peripheral edge of the lens. Therefore, the lens checker provided with the above-mentioned hidden mark observation system is a large one that requires a large-diameter optical system capable of covering the entire test lens.
  • an object of the present invention is to provide a lens checker for observing a hidden mark engraved on the peripheral edge of the lens to be inspected, which can be miniaturized, and a lens checker using the mount.
  • the lens mount for the lens checker of the present invention is Includes a hollow cylinder, a transparent member for mounting the test lens, and a condenser lens.
  • the transparent member for mounting the lens to be inspected is arranged on the top of the hollow cylinder.
  • the diameter of the condenser lens is smaller than the inner diameter of the hollow cylinder.
  • the condenser lens is arranged inside the hollow cylinder so as to be movable in the horizontal direction and to be rotatable right or left. By the horizontal movement of the condenser lens, the irradiation position of the transmitted light to the test lens can be moved to the peripheral edge portion of the test lens.
  • the lens checker of the present invention is Includes a light source, a base, a lens mounting base, a support, and a light receiving side optical system.
  • the base includes a pinhole type diaphragm means coaxially arranged with the light source.
  • the lens mounting table to be inspected is arranged in the center of the upper surface of the base so as to be movable in the vertical direction.
  • the support column rises from one end side on the base.
  • the light receiving side optical system is arranged at the upper end of the support column, and includes an objective lens, an imaging lens, and an imaging means in order from the test lens mounting base side.
  • the test lens mounting table is the test lens mounting table of the present invention.
  • the condensing lens can be transmitted without increasing the diameter.
  • the light irradiation range can be adjusted as appropriate, and the lens checker for observing the hidden mark engraved on the peripheral edge of the lens to be inspected can be miniaturized.
  • FIG. 1 is a perspective view showing an example of the configuration of the lens checker of the present invention.
  • FIG. 2 is a cross-sectional view showing an example of the configuration of the lens checker of the present invention.
  • FIG. 3 is a cross-sectional view of the lens checker shown in FIG. 1 as viewed from the AA direction.
  • FIG. 4 is a schematic diagram illustrating the movement of light in the lens checker of the present invention.
  • FIG. 5 is a diagram showing an example of a photograph taken by the lens checker of the present invention.
  • FIG. 6 is a plan view showing an example of the configuration of the light-shielding switching means of the present invention.
  • FIG. 7 is a schematic diagram illustrating parallax in a lens checker including the light-shielding switching means of the present invention.
  • FIG. 8 is a diagram showing another example of a photograph taken by the lens checker of the present invention.
  • the condensing lens is a collimating lens unit including a plurality of condensing lenses, and the diameters of the plurality of condensing lenses are all smaller than the inner diameter of the hollow cylindrical body.
  • the plurality of condensing lenses are arranged inside the hollow cylindrical body so as to be movable in the horizontal direction and can be rotated clockwise or counterclockwise, and the lens to be inspected is subjected to the horizontal movement of the plurality of condensing lenses.
  • the irradiation position of the transmitted light may be movable to the peripheral edge of the lens to be inspected.
  • the lens checker of the present invention further includes a light-shielding switching means, and the light-shielding switching means can block the left half of the light-receiving range of the light-receiving optical system with a first knife edge and the right half.
  • the second knife edge is arranged side by side in the horizontal direction, and the light-shielding switching means is arranged so as to be movable in the horizontal direction in the optical path of the imaging means, and by the horizontal movement of the light-shielding switching means.
  • the light receiving side optical system may be rotatable clockwise or counterclockwise.
  • the rotation axis of the condenser lens and the rotation axis of the light receiving side optical system may be the same.
  • the rotation axis of the condenser lens and the rotation axis of the light receiving side optical system may be different.
  • FIG. 1 and 2 show an example of the configuration of the lens checker of the present invention.
  • FIG. 1 is a perspective view
  • FIG. 2 is a cross-sectional view
  • FIG. 3 shows a cross-sectional view of the lens checker shown in FIG. 1 as viewed from the AA direction.
  • this lens checker includes a light source 2, a base 1, a lens mounting base 3 to be inspected, a support column 5, and a light receiving side optical system described later.
  • the lens mounting table 3 in the lens checker of FIGS. 1 to 3 is the lens mounting table of the present invention.
  • the lens mounting table 3 to be inspected is arranged at the center of the upper surface of the base 1.
  • the test lens mounting table 3 includes a hollow cylindrical body 3b, a transparent member 3a for mounting the test lens, and a collimating lens unit 4.
  • Examples of the hollow cylindrical body 3b include a black cylindrical plastic cylinder and the like.
  • the transparent member 3a for mounting the lens to be inspected is arranged on the top of the hollow cylindrical body 3b.
  • Examples of the transparent member 3a for mounting the lens to be inspected include a circular transparent glass plate, a circular transparent resin plate, and the like.
  • the inner diameter of the hollow cylindrical body 3b may be set according to the inner diameter of the condenser lens constituting the collimating lens unit 4 described later and the horizontal movement and rotational movement distance thereof.
  • the thickness of the hollow cylinder 3b is, for example, 2 mm to 5 mm, and the height of the hollow cylinder 3b is, for example, 25 mm to 40 mm.
  • the transparent member 3a for mounting the lens to be inspected may be fitted into a recess provided at the top of the hollow cylindrical body 3b, for example, as shown in FIGS. 2 and 3.
  • the diameter of the transparent member 3a for mounting the lens to be inspected may be appropriately adjusted so that it can be fitted into the top of the hollow cylindrical body 3b.
  • the thickness of the transparent member 3a for mounting the lens to be inspected is, for example, 2 mm to 5 mm.
  • a support arm member 3c for cantilevering and supporting the lens mounting table 3 to be inspected is connected to the hollow cylindrical body 3b.
  • the support arm member 3c may be integrally molded with the hollow cylindrical body 3b, or may be a member separate from the hollow cylindrical body 3b and connected to the hollow cylindrical body 3b at the time of use.
  • the lens mounting table 3 to be inspected is arranged so as to be movable in the vertical direction by, for example, manually screwing the adjustment knob 3d that moves the support arm member 3c up and down. As described above, since the lens mounting table 3 to be examined can be moved in the vertical direction, the focusing position of the imaging means 9, which will be described later, can be appropriately changed and adjusted.
  • the collimating lens unit 4 includes three condenser lenses 4a, 4b, and 4c.
  • the diameters of the three condenser lenses 4a, 4b, and 4c are all smaller than the inner diameter of the hollow cylinder 3b.
  • the collimating lens unit 4 is supported in the air inside the hollow cylinder 3 in a cantilevered state by a sliding guide member 4d horizontally provided on the base 1. Further, the collimating lens unit 4 is arranged so as to be movable in the horizontal direction by, for example, manually screwing the adjusting knob 4e attached to the sliding guide member 4d.
  • the horizontal movable distance of the condenser lenses 4a, 4b, and 4c can be adjusted according to, for example, the diameter of the condenser lenses 4a, 4b, and 4c.
  • the horizontally movable distance is, for example, ⁇ 10 mm to 10 mm.
  • the horizontally movable distance is, for example, ⁇ 15 mm to 15 mm.
  • the condenser lenses 4a, 4b, and 4c may all have the same diameter, or may have different diameters as long as the diameter is smaller than the inner diameter of the hollow cylindrical body 3b.
  • the position of the transmitted light irradiation to the test lens Le can be moved to the peripheral edge of the test lens Le by the horizontal movement of the condenser lenses 4a, 4b, and 4c.
  • the movement of light in the lens checker of the present invention will be described with reference to the schematic diagram of FIG.
  • the irradiation light from the light source 2 is refracted by the pinhole effect of the pinhole type aperture means 2a, and then is condensed by the collimating lens unit 4 including the condenser lenses 4a, 4b, and 4c and transmitted through the test lens Le. To do.
  • the collimating lens unit 4 is arranged inside the hollow cylindrical body 3b so as to be rotatable right or left in addition to being movable in the horizontal direction.
  • the rotation mechanism of the collimating lens unit 4 a conventionally known one may be used.
  • the rotationally movable distance of the condenser lenses 4a, 4b, and 4c can be adjusted according to, for example, the diameter of the condenser lenses 4a, 4b, and 4c. Since the collimating lens unit 4 can rotate clockwise or counterclockwise, the scattered light from the lens Le to be inspected can be more widely taken into the light receiving side optical system described later, and as a result, the inspection range is expanded and the reading performance is expanded. Can be improved. According to the present invention, it is also possible to provide a test lens mounting table 3 in which the collimating lens unit 4 does not rotate and moves only in the horizontal direction.
  • the collimating lens unit 4 includes three condensing lenses 4a, 4b, and 4c, but the collimating lens unit 4 includes two condensing lenses. It may be four or more. Further, instead of the collimating lens unit 4, one condensing lens may be arranged inside the hollow cylindrical body 3b so as to be horizontally movable and rotatable.
  • the support column 5 stands up from one end side on the base 1.
  • the light receiving side optical system is arranged at the upper end of the support column 5, and includes an objective lens 6a, an imaging lens unit 6, and an imaging means 9 in this order from the test lens mounting table 3 side.
  • FIG. 2 shows an example in which the imaging lens unit 6 includes three imaging lenses 6b, 6c, and 6d, but the imaging lens unit 6 may include two imaging lenses. However, it may be four or more. Further, one imaging lens may be used instead of the imaging lens unit 6.
  • Examples of the imaging means 9 include CMOS and the like.
  • the image data obtained by the imaging means 9 may be enlarged and displayed on a display screen of, for example, a personal computer (PC) or a tablet terminal connected by a cable so that a person can observe the image data.
  • PC personal computer
  • the lens checker of the present invention may further have an operation knob 9a for finely adjusting the focus of the imaging means 9.
  • the configuration of the lens checker of the present invention other than the lens mounting table 3 to be inspected may be the same as that of a conventionally known lens checker.
  • the lens checker of the present invention may further include a light-shielding switching means 8.
  • the plan view of FIG. 6 shows an example of the configuration of the shading switching means 8.
  • the light-shielding switching means 8 includes a first knife edge 8b capable of light-shielding the left half of the light-receiving range of the light-receiving optical system and a second knife edge 8a capable of light-shielding the right half. They are arranged side by side in the horizontal direction.
  • the light-shielding switching means 8 includes a first knife edge 8b and a second knife edge 8b and a second variable diaphragm means 7 capable of continuously changing and adjusting the optical path area by operating the diaphragm knob 7a or a dial (not shown). It may be arranged horizontally side by side with the knife edge 8a.
  • FIG. 6 shows an example in which the first knife edge 8b and the second knife edge 8a and the variable drawing means 7 are integrally configured, but the first knife edge 8b and the second knife edge are shown.
  • the 8a and the variable aperture means 7 may be configured to be operated individually. As shown in FIGS.
  • the light-shielding switching means 8 is arranged so as to be movable in the horizontal direction in the optical path of the imaging means 9.
  • the first knife edge 8b and the second knife edge 8a are positioned in the optical path of the imaging means 9, so that the imaging means 9 can capture a left-right parallax image. Is.
  • the light flux transmitted through the lens Le by the first knife edge 8b and the second knife edge 8a is diffracted by the knife edge effect to form an image, while the light flux of the blocked semicircular portion is formed. Since the image is surely cut, the image captured by the imaging means 9 can be obtained as a clear image without interfering with the light flux of the remaining semicircular portion.
  • variable aperture means 7 is positioned in the optical path of the image pickup means 9, and the operation knob 7a or the dial is operated (whether manual or automatic), whereby the image pickup means 9 is used.
  • the brightness and sharpness of the image obtained with can be adjusted.
  • a shading switching device for a lens checker including a first knife edge capable of shading the left half of the light receiving range and a second knife edge capable of shading the right half of the light receiving range.
  • a lens checker including the light-shielding switching means 8 and not including the lens mounting table 3 to be inspected can also be provided.
  • the light receiving side optical system may be rotatable clockwise or counterclockwise.
  • the rotation mechanism of the light receiving side optical system a conventionally known one may be used.
  • the rotationally movable distance of the light receiving side optical system is not particularly limited, and may be appropriately adjusted within a range in which the scattered light by the test lens Le can be received. Since the light receiving side optical system can be rotated clockwise or counterclockwise, the scattered light from the lens Le to be inspected can be taken in more widely, and as a result, the inspection range can be expanded and the reading performance can be improved. ..
  • the present invention it is possible to provide a lens checker in which the collimating lens unit 4 does not rotate and only the light receiving side optical system can rotate and move, and only the collimating lens unit 4 can rotate and move. It is also possible to provide a lens checker in which the light receiving side optical system does not rotate and move.
  • both the collimating lens unit 4 and the light receiving side optical system are rotatable, their rotation axes may be the same or different.
  • FIG. 4 shows an example in which the collimating lens unit 4 and the light receiving side optical system have the same rotation axis.
  • the test lens Le (whether it is a round lens or a lens with a spectacle frame) is placed on the test lens mounting transparent member 3a of the test lens mounting base 3.
  • the image of the transmitted light from the test lens Le is captured by the imaging means 9 while adjusting the amount of light of the light source 2 with the operation dial 1a.
  • This imaging data is transmitted to a PC or the like and displayed on a display screen, and a person observes a hidden mark on the surface of the lens Le to be inspected.
  • the focusing operation and the like at that time are the same as those in the conventionally known lens checker.
  • the shading switching means 8 may be used to obtain a clear image.
  • a holding mechanism for fixing the spectacles and the lens may be appropriately added to the lens mounting table 3 to be inspected.
  • the peripheral portion of the lens Le to be inspected is formed. It is possible to irradiate the light from the collimating lens unit 4 without deviating from it.
  • the condenser lenses 4a, 4b, and 4c used are not the conventional large-diameter lenses but small-diameter lenses.
  • the lens checker can be miniaturized.
  • the light receiving side optical systems such as the objective lens 6a and the imaging lenses 6b, 6c, 6d included in the imaging lens unit also have a small diameter instead of the conventional large diameter. Therefore, the lens checker can be miniaturized from this point as well.
  • the lens checker it is possible to reliably observe the hidden mark engraved on the peripheral edge of the lens to be inspected Le without using a large-diameter optical system.
  • the procedure for observing the hidden mark of the spectacle lens framed in the spectacle frame will be described.
  • the spectacle lens is placed on the transparent member 3a for mounting the test lens of the test lens mounting table 3, and a hidden mark engraved on the peripheral portion of the lens is found.
  • the adjustment knob 4e is manually rotated to collect the collection included in the collimating lens unit 4.
  • the optical center position of the spectacle lens after confirming the hidden mark do as follows. That is, since two hidden marks are engraved at a position 17 mm to the left and a position 17 mm to the right from the optical center of the spectacle lens, the position moved toward the center of the lens by 17 mm, which corresponds to half of the distance of 34 mm between them. May be marked as the optical center of the spectacle lens to be inspected. If necessary, this marking may be used to evaluate the compatibility of the lens with the frame and the like.
  • the lens checker of the present invention includes the light-shielding switching means 8, it is possible to inexpensively and easily discriminate between scratches having a similar shape and foreign matter such as dirt.
  • a lighting unit integrated with a diffuser plate for observing a test lens is provided on a CCD camera or the like arranged to face each other so that the common axis can be adjusted to transmit the test lens.
  • An example is described in which the brightness distribution related to the light intensity of transmitted light is measured from the obtained image data, and the brightness and the like are quantified and comparatively calculated to mechanically determine scratches and foreign matter.
  • the present invention it is inexpensive and easy only by adding a light-shielding switching mechanism without requiring an expensive luminance sensor or arithmetic processing means for digitizing image data required for mechanical determination in the same publication. In addition, it is possible to distinguish between scratches and foreign substances such as dirt.
  • the height of the lens mounting table 3 to be examined is first adjusted to a predetermined position, and then a plate called a target is placed on the lens mounting table 3 to be imaged.
  • a predetermined MTF spatial frequency
  • the shading switching means 8 by horizontally moving the shading switching means 8, the first knife edge 8b and the second knife edge 8a are alternately positioned in the optical path of the imaging means 9, so that the left half and right half images can be obtained. Operate as.
  • the above-mentioned focusing operation by the operation knob 9a and the horizontal movement operation of the shading switching means 8 are not limited to manual operations, and may be configured to be automatically performed in sequence.
  • the procedure for determining whether the surface of the lens Le to be inspected is a scratch or a foreign substance such as dust or dirt is described with reference to FIGS. 7 and 8. explain. Since the image pickup means 9 is focused on the surface of the lens Le to be examined by the above-mentioned initial setting, when the scratch 10a is present on the lens Le to be examined, it is indicated by reference numeral (A) in FIG. As described above, the image pickup means 9 forms an image at one point, and as shown in the region surrounded by the reference numeral A in FIG. 8, it is captured as a scratch image at one point.
  • the reference numeral in FIG. 7 is the amount of the foreign matter 10c floating from the surface of the test lens Le.
  • B the distance between the optical axis foci fluctuates, and in combination with the left and right knife edge effects, the positions are doubly displaced as shown in the region surrounded by the symbol B in FIG. That is, it is imaged and displayed as an image with parallax.
  • the latter image can be confirmed as an image of a foreign substance that is not a scratch.
  • the present invention it is possible to accurately, inexpensively and easily discriminate between scratches and foreign substances such as dust and dirt by human inspection without using expensive mechanical arithmetic processing means. Can be done.
  • the scratches 10b and the like on the back surface of the lens Le to be inspected can also be discriminated in the same manner as the case of the front surface of the lens Le to be inspected if the back surface of the lens Le to be inspected is focused.
  • the lens checker for observing the hidden mark engraved on the peripheral edge of the lens to be inspected.
  • Base 2 Light source 2a Pinhole type aperture means 3 Test lens mounting base 3a Transparent member for mounting the test lens 3b Hollow cylindrical body 3d, 4e Adjustable knob 4 Collimating lens unit 4a, 4b, 4c Condensing lens 4d Slide Formula Guide member 6a Objective lens 6 Imaging lens unit 6b, 6c, 6d Imaging lens 7 Variable aperture means 8a Second knife edge 8b First knife edge 9 Imaging means

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • Optics & Photonics (AREA)
  • Testing Of Optical Devices Or Fibers (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)

Abstract

La présente invention a pour objet de fournir une table de montage pour une lentille à vérifier, qui permet de réduire la taille d'un dispositif de vérification de lentille pour observer une marque cachée gravée sur le bord périphérique de la lentille à vérifier.　La table de montage pour une lentille à vérifier pour un dispositif de vérification de lentille selon la présente invention comprend un corps cylindrique creux (3b), un élément transparent (3a) servant au montage de la lentille à vérifier et des lentilles de condenseur (4a, 4b, 4c). L'élément transparent (3a) servant au montage de la lentille à vérifier est disposé sur la partie supérieure du corps cylindrique creux (3b), le diamètre des lentilles de condenseur (4a, 4b, 4c) est plus petit que le diamètre intérieur du corps cylindrique creux (3b) ; les lentilles de condenseur (4a, 4b, 4c) sont disposées de façon à être mobiles dans la direction horizontale à l'intérieur du corps cylindrique creux (3b) et, par le déplacement horizontal des lentilles de condenseur (4a, 4b, 4c), la position d'irradiation de la lumière transmise par rapport à la lentille à vérifier peut être déplacée vers le bord périphérique de la lentille à vérifier.
PCT/JP2019/037904 2019-09-26 2019-09-26 Table de montage pour lentille à vérifier et dispositif de vérification de lentille WO2021059439A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2019553589A JP6710814B1 (ja) 2019-09-26 2019-09-26 被検レンズ載置台及びレンズチェッカー
PCT/JP2019/037904 WO2021059439A1 (fr) 2019-09-26 2019-09-26 Table de montage pour lentille à vérifier et dispositif de vérification de lentille

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Application Number Priority Date Filing Date Title
PCT/JP2019/037904 WO2021059439A1 (fr) 2019-09-26 2019-09-26 Table de montage pour lentille à vérifier et dispositif de vérification de lentille

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WO2021059439A1 true WO2021059439A1 (fr) 2021-04-01

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113203708A (zh) * 2021-04-22 2021-08-03 平方和(北京)科技有限公司 一种光学设备

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02173544A (ja) * 1988-12-27 1990-07-05 Olympus Optical Co Ltd レンズ検査装置
WO1999041582A1 (fr) * 1998-02-13 1999-08-19 Kabushiki Kaisha Topcon Appareil de mesure pour lentilles
US20150002656A1 (en) * 2011-12-15 2015-01-01 Essilor International (Compagnie Generale D'optiqu E) System and method for optical reading of markings printed on a face of an ophthalmic lens
JP6564153B1 (ja) * 2018-04-27 2019-08-21 株式会社アサヒビジョン 被検レンズ載置台及びレンズチェッカー

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02173544A (ja) * 1988-12-27 1990-07-05 Olympus Optical Co Ltd レンズ検査装置
WO1999041582A1 (fr) * 1998-02-13 1999-08-19 Kabushiki Kaisha Topcon Appareil de mesure pour lentilles
US20150002656A1 (en) * 2011-12-15 2015-01-01 Essilor International (Compagnie Generale D'optiqu E) System and method for optical reading of markings printed on a face of an ophthalmic lens
JP6564153B1 (ja) * 2018-04-27 2019-08-21 株式会社アサヒビジョン 被検レンズ載置台及びレンズチェッカー

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113203708A (zh) * 2021-04-22 2021-08-03 平方和(北京)科技有限公司 一种光学设备

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JP6710814B1 (ja) 2020-06-17

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