Gradient index optical element and method for making the same
US5818644A · kind A · utility
21Cited by
11References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 4, 1996 |
| Grant date | Oct 6, 1998 |
| Priority date | — |
| Expiry date | Nov 4, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B3/0087
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A gradient index optical element comprises a component capable of absorbing light unnecessary for image formation and observation. The optical element is made according to a solgel process wherein a gradient index glass or plastic body is initially made and then incorporated with a light-absorbing component such as CuO and FeO that absorbs unnecessary light. The optical element has a filter function for eliminating light unnecessary for image formation and observation. A lens system having a reduced number of optical elements is realized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.