GB798877A - Improvements in or relating to lenses - Google Patents
Improvements in or relating to lensesInfo
- Publication number
- GB798877A GB798877A GB1171756A GB1171756A GB798877A GB 798877 A GB798877 A GB 798877A GB 1171756 A GB1171756 A GB 1171756A GB 1171756 A GB1171756 A GB 1171756A GB 798877 A GB798877 A GB 798877A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sheet
- lenses
- lens
- transparent
- secured
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/00932—Combined cutting and grinding thereof
Abstract
798,877. Lenses. BIRCH, M. H. Oct. 9, 1956 [April 17, 1956], No. 11717/56. Class 97(1) [Also in Group XXIII] A plastic lens blank having preformed refractory surfaces has at least one of the said surfaces at least partially covered by a sheet of flexible material secured thereto by adhesive so that the sheet is capable of being removed without damaging the refractory surface. The sheet or sheets may be transparent and may completely cover the surfaces. As shown a spectacle lens blank 11 has secured thereto a transparent adhesive sheet 12 marked at 13 with the outline shape 13 of the focal lens and having marks 14, 15 indicating the position of the optical and geometrical centres and the horizontal axis 16 and cylindrical axis 17 of the lens. The markings assist the edging operation to protect the lenses during the final setting up, polishing and wiping of the mounts.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1171756A GB798877A (en) | 1956-04-17 | 1956-04-17 | Improvements in or relating to lenses |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1171756A GB798877A (en) | 1956-04-17 | 1956-04-17 | Improvements in or relating to lenses |
Publications (1)
Publication Number | Publication Date |
---|---|
GB798877A true GB798877A (en) | 1958-07-30 |
Family
ID=9991394
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1171756A Expired GB798877A (en) | 1956-04-17 | 1956-04-17 | Improvements in or relating to lenses |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB798877A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1985005317A1 (en) * | 1984-05-24 | 1985-12-05 | University Of Strathclyde | Coating material for lenses |
-
1956
- 1956-04-17 GB GB1171756A patent/GB798877A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1985005317A1 (en) * | 1984-05-24 | 1985-12-05 | University Of Strathclyde | Coating material for lenses |
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