GB1473321A - Manufacture of a lens - Google Patents

Manufacture of a lens

Info

Publication number
GB1473321A
GB1473321A GB2008173A GB2008173A GB1473321A GB 1473321 A GB1473321 A GB 1473321A GB 2008173 A GB2008173 A GB 2008173A GB 2008173 A GB2008173 A GB 2008173A GB 1473321 A GB1473321 A GB 1473321A
Authority
GB
United Kingdom
Prior art keywords
lens
locator
blank
base
layer
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
GB2008173A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dollond and Aitchison Services Ltd
Original Assignee
Dollond and Aitchison Services Ltd
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 Dollond and Aitchison Services Ltd filed Critical Dollond and Aitchison Services Ltd
Priority to GB2008173A priority Critical patent/GB1473321A/en
Publication of GB1473321A publication Critical patent/GB1473321A/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B13/00Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
    • B24B13/005Blocking means, chucks or the like; Alignment devices

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Eyeglasses (AREA)

Abstract

1473321 Grinding lenses DOLLOND & AITCHISON SERVICES Ltd 20 May 1974 [27 April 1973] 20081/73 Heading B3D A locator 1 for temporary attachment to a lens blank 30 whereby the blank can be located in a predetermined position in apparatus for operating on the blank, comprises a layer 2 of readily-deformable material which can assume a shape complementary to that of the blank, a central opening through which the blank can be viewed and formations 3 for co-operation with a complementary element 25 to locate the blank in a predetermined position relative to the element. The locator may have two layers, a layer 1 of solid neoprene rubber and a layer 2 which is more easily compressible, such as cellular plastics material, and which is coated with adhesive for temporary securing the locator to the lens. The locator is annular and the inner edge of at least the layer 1 is formed with indentations 3 which are engageable with projections 26 of an annular locating element 25 of a lens edging machine having driving or holding elements 27, 28 formed with rubber or like heads 29 for holding or rotating the lens during an edging-operation. The lens with the locator 1 attached can be removed from the edging machine for testing in the spectacle frame. An alternative locator consists of a single annular layer of ethylene vinyl acetate having adhesive on one surface 31, Fig. 6, for temporary attachment to the lens, and a chamfer 32 on its upper, inner edge to avoid contraction on to the locating element when the locator is attached to the curved surface of a lens. The inner surface has inwardly directed projections 34 for complementary engagement with the locating element and an external projection 36 to assist the operator in identifying the upper edge of the lens. The apparatus for applying the locator to the lens blank consists of a base 5 having a slot 6 for slidably receiving a bar 7 which is secured to a circular platform 8 guided for movement on the base by pins 9 engaging further slots in the base. One of the pins is connected by a link 14 to a lever 10 movable about a pivot 11 by a handle 13, to a position determined by a scale 12. An annular scale is marked on the periphery of platform 8 and a circular transparent cursor 15 is mounted over the platform. A transparent cover 16 is fixed to the platform over the cursor and has a base 17 projecting upwardly therefrom and rotatable relative to the bar 7, a handle 18 being provided to effect rotation of the base. A hollow cylindrical support 19 is vertically slidable on the boss, being biased upwardly against a stop by a spring, and has a rubber or like ring 20 for receiving the lens blank. A post 23 extends upwardly from the base and has sighting means 22 for viewing reference marks, e.g. marks indicating the optical centre and/or cylinder axis of the lens. Any offset of the optical centre and angle between the cylinder axis and a horizontal centre line of the lens is adjusted by movement of lever 10 and angular adjustment of the boss, the lens then being positioned on the ring by aligning the reference marks with the graticule of the sighting means. The lens is then pressed downwardly to engage the upper adhesive coated side of a locator placed in a locating element 21 supported on the boss 17.
GB2008173A 1974-05-20 1974-05-20 Manufacture of a lens Expired GB1473321A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2008173A GB1473321A (en) 1974-05-20 1974-05-20 Manufacture of a lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2008173A GB1473321A (en) 1974-05-20 1974-05-20 Manufacture of a lens

Publications (1)

Publication Number Publication Date
GB1473321A true GB1473321A (en) 1977-05-11

Family

ID=10140050

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2008173A Expired GB1473321A (en) 1974-05-20 1974-05-20 Manufacture of a lens

Country Status (1)

Country Link
GB (1) GB1473321A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111511502A (en) * 2017-10-16 2020-08-07 国家视觉公司 Integrated system and method for manufacturing, sorting and dispensing eyeglasses
CN112059815A (en) * 2020-08-20 2020-12-11 中国科学院上海光学精密机械研究所 Fixed grinding head structure and edge error-free machining method thereof
CN112720154A (en) * 2020-12-29 2021-04-30 林斌发 Wafer processing edging equipment

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111511502A (en) * 2017-10-16 2020-08-07 国家视觉公司 Integrated system and method for manufacturing, sorting and dispensing eyeglasses
CN112059815A (en) * 2020-08-20 2020-12-11 中国科学院上海光学精密机械研究所 Fixed grinding head structure and edge error-free machining method thereof
CN112059815B (en) * 2020-08-20 2022-05-31 中国科学院上海光学精密机械研究所 Fixed grinding head structure and edge error-free machining method thereof
CN112720154A (en) * 2020-12-29 2021-04-30 林斌发 Wafer processing edging equipment
CN112720154B (en) * 2020-12-29 2022-06-17 瑟德莱伯(嘉兴)科技智造有限公司 Wafer processing edging equipment

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee