GB2317131A - Method and apparatus for optical polishing - Google Patents

Method and apparatus for optical polishing

Info

Publication number
GB2317131A
GB2317131A GB9726576A GB9726576A GB2317131A GB 2317131 A GB2317131 A GB 2317131A GB 9726576 A GB9726576 A GB 9726576A GB 9726576 A GB9726576 A GB 9726576A GB 2317131 A GB2317131 A GB 2317131A
Authority
GB
United Kingdom
Prior art keywords
workpiece
tool
optical
polishing
working surface
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.)
Granted
Application number
GB9726576A
Other versions
GB2317131B (en
GB9726576D0 (en
Inventor
David Douglas Walker
Richard George Bingham
Sug-Whan Kim
Keith Ernest Puttick
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.)
Optical Generics Ltd
Original Assignee
Optical Generics 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
Priority claimed from GBGB9512262.8A external-priority patent/GB9512262D0/en
Application filed by Optical Generics Ltd filed Critical Optical Generics Ltd
Priority to GB9726576A priority Critical patent/GB2317131B/en
Publication of GB9726576D0 publication Critical patent/GB9726576D0/en
Publication of GB2317131A publication Critical patent/GB2317131A/en
Application granted granted Critical
Publication of GB2317131B publication Critical patent/GB2317131B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D13/00—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor
    • B24D13/14—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face
    • B24D13/147—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face comprising assemblies of felted or spongy material; comprising pads surrounded by a flexible material
    • 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
    • B24B13/015—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor of television picture tube viewing panels, headlight reflectors or the like
    • 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
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/04—Headstocks; Working-spindles; Features relating thereto

Abstract

A lapping tool for localised optical polishing of a workpiece, the tool having a flexible working surface and being characterised by means for selectively varying the pressure applied, in use, on the workpiece by different regions of the tool working surface whereby to vary the effective area of contact with the workpiece. A method of optical polishing and optical workpiece using a lapping tool whose maximum working surface area is substantially smaller than the workpiece, comprising determining the path to be travelled by the tool across the workpiece and determining the pressure and effective area of contact of the tool on the workpiece, in order to achieve the next stage of polishing, and then driving the tool over that path while dynamically varying the said applied pressure and effective contact area. Apparatus for guiding a body, such as an optical polishing tool, over a generally flat structure, such as an optical workpiece, comprising a three-dimensional drive mechanism for the controlled movement of the body across the surface of the structure, and a pivoted linkage linking the drive mechansim to the body such as to constrain the body to pivotal motion about a virtual pivot point which is fixed relative to the drive mechanism and is located at the interace between the body and the workpiece.
GB9726576A 1995-06-16 1996-06-17 Method and apparatus for optical polishing Expired - Fee Related GB2317131B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9726576A GB2317131B (en) 1995-06-16 1996-06-17 Method and apparatus for optical polishing

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GBGB9512262.8A GB9512262D0 (en) 1995-06-16 1995-06-16 Tool for computer-controlled machine for optical polishing and figuring
PCT/GB1996/001459 WO1997000155A1 (en) 1995-06-16 1996-06-17 Method and apparatus for optical polishing
GB9726576A GB2317131B (en) 1995-06-16 1996-06-17 Method and apparatus for optical polishing

Publications (3)

Publication Number Publication Date
GB9726576D0 GB9726576D0 (en) 1998-02-11
GB2317131A true GB2317131A (en) 1998-03-18
GB2317131B GB2317131B (en) 1999-12-22

Family

ID=26307221

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9726576A Expired - Fee Related GB2317131B (en) 1995-06-16 1996-06-17 Method and apparatus for optical polishing

Country Status (1)

Country Link
GB (1) GB2317131B (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2163076A (en) * 1984-08-18 1986-02-19 Zeiss Stiftung Lapping and polishing optical surfaces
EP0362811B1 (en) * 1988-10-06 1994-01-12 Shin-Etsu Handotai Company Limited Polishing apparatus
EP0653270A1 (en) * 1993-10-18 1995-05-17 Shin-Etsu Handotai Company Limited Method of polishing semiconductor wafers and apparatus therefor

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB615649A (en) * 1946-03-15 1949-01-10 Hilger Ltd Adam Improvements in or relating to machines for grinding and polishing non-spherical optical surfaces
US4128968A (en) * 1976-09-22 1978-12-12 The Perkin-Elmer Corporation Optical surface polisher
US5157878A (en) * 1987-03-19 1992-10-27 Canon Kabushiki Kaisha Polishing method with error correction
US4958463A (en) * 1988-06-06 1990-09-25 United Technologies Corporation Optical surface quality improving arrangement
US5255474A (en) * 1990-08-06 1993-10-26 Matsushita Electric Industrial Co., Ltd. Polishing spindle

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2163076A (en) * 1984-08-18 1986-02-19 Zeiss Stiftung Lapping and polishing optical surfaces
EP0362811B1 (en) * 1988-10-06 1994-01-12 Shin-Etsu Handotai Company Limited Polishing apparatus
EP0653270A1 (en) * 1993-10-18 1995-05-17 Shin-Etsu Handotai Company Limited Method of polishing semiconductor wafers and apparatus therefor

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
"RAPID OPTICAL FABRICATION WITH COMPUTER-CONTROLLED OPTICAL SURFACING" *
OPTICAL ENGINEERING, vol.30, no.12, 1 December 1991, pages 1962-1968, XP000240917 JONES R A ET AL: *
see page 1963, paragraph 3 - page 1965, paragraph 4: figures 4,5,7,8 *

Also Published As

Publication number Publication date
GB2317131B (en) 1999-12-22
GB9726576D0 (en) 1998-02-11

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Legal Events

Date Code Title Description
727 Application made for amendment of specification (sect. 27/1977)
727A Application for amendment of specification now open to opposition (sect. 27/1977)
727B Case decided by the comptroller ** specification amended (sect. 27/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20150617