Lens system for facsimile
US4264139A · kind A · utility
3Cited by
2References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 4, 1979 |
| Grant date | Apr 28, 1981 |
| Priority date | — |
| Expiry date | Oct 4, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B13/24
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A lens system for facsimile comprising a first positive lens component, a second biconcave lens component and a third lens component consisting of a negative lens element and a positive lens element, said lens system having high OTF and assuring very low distortion as well as high intensity for marginal rays.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.