Small anamorphic lenses and method
US4684222A · kind A · utility
26Cited by
1References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 30, 1984 |
| Grant date | Aug 4, 1987 |
| Priority date | — |
| Expiry date | May 30, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B3/04
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Anamorphic lenses or lens arrays are formed in photosensitively crystallizable glass by selective exposure of the glass surface and thermal treatment to cause the crystallization of the glass surrounding the lenses. The lenses, which have elongated cross-sections in the plane of the exposed glass surface and raised curved surfaces resulting from the densification of the surround material, exhibit different surface curvatures over their major and minor transverse axes and thus anamorphic light-focusing properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.