Fourier transform lens assembly and optical information processor employing same
US5383056A · kind A · utility
6Cited by
3References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 28, 1992 |
| Grant date | Jan 17, 1995 |
| Priority date | — |
| Expiry date | Sep 28, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/46
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A Fourier transform lens assembly suited for use in an optical information processor includes a first lens group having a positive power, a second lens group having a negative power disposed on one side of the first lens group, and a third lens group having a positive power disposed on the side opposite to the first lens group with respect to the second lens group. The distance between a front focal plane and a back focal plane of the Fourier transform lens assembly is less than two times a focal length of the Fourier transform lens assembly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.