Contrast control for lens
US4816876A · kind A · utility
5Cited by
5References
5Claims
0Family size
Inventor
Key dates
| Filing date | Nov 30, 1987 |
| Grant date | Mar 28, 1989 |
| Priority date | — |
| Expiry date | Nov 30, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03F7/2002
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A device and method of controlling the amount of flare or veiling glare in an imaging system by the simple addition of light scattering element. The amount of flare or veiling glare that is produced in the optical path is variable to determines the degree of contrast loss and thus the final contrast of the image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.