GB1165549A - Improvements in Multifocal Lens Blank Manufacture. - Google Patents
Improvements in Multifocal Lens Blank Manufacture.Info
- Publication number
- GB1165549A GB1165549A GB5580866A GB5580866A GB1165549A GB 1165549 A GB1165549 A GB 1165549A GB 5580866 A GB5580866 A GB 5580866A GB 5580866 A GB5580866 A GB 5580866A GB 1165549 A GB1165549 A GB 1165549A
- Authority
- GB
- United Kingdom
- Prior art keywords
- blank
- block
- lens blank
- lens
- reference flats
- 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
Links
- 238000004519 manufacturing process Methods 0.000 title 1
- 239000000956 alloy Substances 0.000 abstract 1
- 229910045601 alloy Inorganic materials 0.000 abstract 1
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 238000007493 shaping process Methods 0.000 abstract 1
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
- B24B13/0012—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor for multifocal lenses
-
- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/02—Lenses; Lens systems ; Methods of designing lenses
- G02C7/06—Lenses; Lens systems ; Methods of designing lenses bifocal; multifocal ; progressive
Landscapes
- Health & Medical Sciences (AREA)
- Ophthalmology & Optometry (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Eyeglasses (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
Abstract
1,165,549. Grinding. UNIVIS Inc. 13 Dec., 1966 [12 Jan., 1966], No. 55808/66. Heading B3D. [Also in Division G2] A bifocal lens blank 20 (Division G2) is provided with referencing means at its peripheral edge for indicating the position of the reading portion of the blank. The lens blank is first aligned with a target (Fig. 14, not shown) and clamped in position. The periphery of the lens blank is then milled to produce two reference flats by grinding wheels 80, 82 which are adapted to move along slides 84, 86 respectively. The distances of the reference flats from the centre of the blank are adjusted by moving the slides 84, 86 towards and away from the lens blank 20. The finished blank is then mounted on a block 94 (Fig. 17), the reference flats being arranged to abut against adjustable stops. A second lens block 92 is positioned on the lens blank and accurately aligned with the block 94 by means of a gimbal arrangement 110. A rotatable dial 132 carries two pins 136, 138 arranged to engage recesses 140, 142 provided in the block 92. The dial is rotated until the line joining the two pins is parallel with the cylinder axis of the lens blank 20. The block 92 is then secured to the lens blank with a lowmelting point alloy 150 which is poured in molten state into a recess between the block 92 and the lens blank. The blank is thus accurately mounted on the block 92 for shaping the free surface to the required configuration.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US52017366A | 1966-01-12 | 1966-01-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1165549A true GB1165549A (en) | 1969-10-01 |
Family
ID=24071465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5580866A Expired GB1165549A (en) | 1966-01-12 | 1966-12-13 | Improvements in Multifocal Lens Blank Manufacture. |
Country Status (6)
| Country | Link |
|---|---|
| BE (1) | BE692018A (en) |
| CH (1) | CH477010A (en) |
| DE (1) | DE1596688A1 (en) |
| FR (1) | FR1514223A (en) |
| GB (1) | GB1165549A (en) |
| NL (1) | NL6700424A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2155653A (en) * | 1984-03-08 | 1985-09-25 | Bristol Alexander C | Aspheric spectacle lens blank |
| GB2319352A (en) * | 1996-11-12 | 1998-05-20 | Gerber Optical Inc | Attaching finishing block to lens using alignment pattern |
-
1966
- 1966-12-13 GB GB5580866A patent/GB1165549A/en not_active Expired
- 1966-12-29 FR FR89373A patent/FR1514223A/en not_active Expired
- 1966-12-30 BE BE692018D patent/BE692018A/xx unknown
-
1967
- 1967-01-10 DE DE19671596688 patent/DE1596688A1/en active Pending
- 1967-01-11 CH CH36367A patent/CH477010A/en not_active IP Right Cessation
- 1967-01-11 NL NL6700424A patent/NL6700424A/xx unknown
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2155653A (en) * | 1984-03-08 | 1985-09-25 | Bristol Alexander C | Aspheric spectacle lens blank |
| GB2319352A (en) * | 1996-11-12 | 1998-05-20 | Gerber Optical Inc | Attaching finishing block to lens using alignment pattern |
| GB2319352B (en) * | 1996-11-12 | 1998-12-09 | Gerber Optical Inc | Attaching finishing block to lens using alignment pattern |
| US6011630A (en) * | 1996-11-12 | 2000-01-04 | Gerber Optical, Inc. | System and method for blocking a lens |
Also Published As
| Publication number | Publication date |
|---|---|
| NL6700424A (en) | 1967-07-13 |
| BE692018A (en) | 1967-06-30 |
| FR1514223A (en) | 1968-02-23 |
| CH477010A (en) | 1969-08-15 |
| DE1596688A1 (en) | 1970-12-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB1508928A (en) | Lens-holder assembly | |
| GB1321543A (en) | Device for centring a spectacle lens | |
| GB1165549A (en) | Improvements in Multifocal Lens Blank Manufacture. | |
| GB568936A (en) | Improvements relating to apparatus for determining angles | |
| US2917971A (en) | Lens marking devices | |
| US2932135A (en) | Machine for sharpening four-face drills | |
| GB808976A (en) | Improvements in and relating to copying lathes | |
| US2465393A (en) | Radius turning attachment | |
| GB1038301A (en) | Improvements in or relating to the manufacture of multifocal ophthalmic lenses | |
| GB1164732A (en) | Improvements in or relating to Apparatus for Mounting an Untrimmed Spectacle Lens for Trimming on a Trimming Machine | |
| GB1172046A (en) | Improved Copying Face Grinding Machine | |
| US1467307A (en) | Lens-blocking mechanism | |
| GB1257846A (en) | ||
| US2222069A (en) | Method for predetermining the volume represented by a shaded record | |
| GB400212A (en) | Improvements in or relating to form grinding | |
| GB1292202A (en) | Improvements in or relating to opthalmic lenses | |
| GB1380479A (en) | Balancing machine | |
| CA973713A (en) | Auxiliary workpiece supporting means for precision grinding machines | |
| SU443726A1 (en) | The method of processing hollow parts | |
| GB1304915A (en) | ||
| US2289244A (en) | Apparatus for setting the cutting tool in a reproducing machine relative to a work blank | |
| GB704733A (en) | Improvements relating to angularly adjustable work-holders | |
| GB1362430A (en) | Machining apparatus | |
| GB808791A (en) | Depth of focus indicators in photographic cameras | |
| ES303765A3 (en) | Metal polishing machine (Machine-translation by Google Translate, not legally binding) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |