Fresnel lens fabrication
US4645523A · kind A · utility
27Cited by
6References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 7, 1985 |
| Grant date | Feb 24, 1987 |
| Priority date | — |
| Expiry date | Aug 7, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S359/90
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A Fresnel lens is fabricated by depositing concentric layers of first and second materials in alternation on a substrate surface. The substrate and deposited layers are then drawn down to provide a predetermined Fresnel lens zone structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.