Double gauss lens for a raster input scanner
US4863251A · kind A · utility
45Cited by
7References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 13, 1987 |
| Grant date | Sep 5, 1989 |
| Priority date | — |
| Expiry date | Mar 13, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B26/10
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A double Gauss reduction lens is optimized for projecting line images from an object plane onto a photosensor array. The six elements, four-component lens has a numeral focal length of 550 mm, a field of view of 17.degree. at the numeral 550 mm overall object to image conjugate length and a magnification of 0.1102. The lens is characterized by a high modulation transfer fequency, large depth of focus and low distortion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.