GB1302852A - - Google Patents

Info

Publication number
GB1302852A
GB1302852A GB1302852DA GB1302852A GB 1302852 A GB1302852 A GB 1302852A GB 1302852D A GB1302852D A GB 1302852DA GB 1302852 A GB1302852 A GB 1302852A
Authority
GB
United Kingdom
Prior art keywords
lens
axis
rotation
work
holder
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
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 filed Critical
Publication of GB1302852A publication Critical patent/GB1302852A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
    • B24B13/005—Blocking means, chucks or the like; Alignment devices
    • B24B13/0052—Lens block moulding devices

Landscapes

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

Abstract

1302852 Grinding POWEEGRIND Ltd 5 March 1970 [7 Dec 1968] 58254/68 Heading B3D A lens blocking or mounting apparatus comprises means 14 for eccentric formation of the lens blocking material 6a relative to the body 9 of the block so that the body or a work-holder engaging the body may be held in a chuck for rotation about one axis O and may also be located by the eccentric formation for rotation about a different axis G. An outer sleeve 2 has an inner member 3 eccentrically disposed therein and a cooling ring 4 at one end forming a circular cavity 5 coaxial with the sleeve. A work-holder 6 is disposed in the cavity and a rim 7 on the ring is provided for locating the lens 10 with its optical axis O coaxial with the axis of the ring. A low melting point material, such as pitch, wax or a metal alloy, is introduced through a gap 7a in the rim. Recesses 6a are formed in the material by pins 13 on the member 3 which is disposed with its axis G coaxial with the geometric centre of the lens. The lens and block 9 can be removed from the apparatus by a pin, the work-holder 6, or the material if a workholder is not used, permitting mounting of the lens in a chuck for rotation about the optical axis O, and the recesses 6a permitting mounting for rotation about the axis G. In another arrangement, the pins 13 engage directly with recesses in the work-holder. In a further embodiment, the locating surface is formed on the ejector pin and is tapered and formed with a flat reference surface.
GB1302852D 1968-12-07 1968-12-07 Expired GB1302852A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5825468 1968-12-07

Publications (1)

Publication Number Publication Date
GB1302852A true GB1302852A (en) 1973-01-10

Family

ID=10481147

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1302852D Expired GB1302852A (en) 1968-12-07 1968-12-07

Country Status (1)

Country Link
GB (1) GB1302852A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1988009239A1 (en) * 1987-05-26 1988-12-01 Fmtd Fabrique De Machines Et Taillerie De Diamants Rotary fixing device for fixing by freezing
EP0371621A1 (en) * 1988-11-30 1990-06-06 Optical Company Limited Norville Lens location block

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1988009239A1 (en) * 1987-05-26 1988-12-01 Fmtd Fabrique De Machines Et Taillerie De Diamants Rotary fixing device for fixing by freezing
GB2211119A (en) * 1987-05-26 1989-06-28 Fmtd Fab Mach Taill Diamants Rotary fixing device for fixing by freezing
GB2211119B (en) * 1987-05-26 1991-06-05 Fmtd Fab Mach Taill Diamants Rotary attachment means.
EP0371621A1 (en) * 1988-11-30 1990-06-06 Optical Company Limited Norville Lens location block
AU622736B2 (en) * 1988-11-30 1992-04-16 Stephen Jack Wylde Lens location block

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees