Non-uniform mask lens
US6412945B1 · kind B1 · utility
3Cited by
5References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 25, 2000 |
| Grant date | Jul 2, 2002 |
| Priority date | — |
| Expiry date | Oct 25, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C7/02
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A device and method for a non-uniform lens which incorporates geometry for external and internal eye relief which meets requirements of optical corrections and optical sighting systems is provided. The geometry of the front and back surfaces of a lens are approximated by curve-fitting polynomials so that the optical correction is included. The non-uniform mask lens can be made of any optical material and can be cast or injection molded.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.