Anti-aliasing optical system with pyramidal transparent structure
US4989959A · kind A · utility
35Cited by
13References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 12, 1989 |
| Grant date | Feb 5, 1991 |
| Priority date | — |
| Expiry date | Jun 12, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/46
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Optical, low-pass filter, anti-aliasing apparatus for an array of photosensor elements is a substantially wavelength independent optical, low-pass phase filter formed from a substantially transparent, convex or concave pyramidal structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.