Concave mirror optical system for scanner
US6648483B1 · kind B1 · utility
24Cited by
6References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 7, 2000 |
| Grant date | Nov 18, 2003 |
| Priority date | — |
| Expiry date | Feb 19, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/0031
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A concave mirror optical system for a scanner and a method for compensating image distortion. In this invention, the more expensive lens assembly in a conventional optical system is replaced by a concave mirror made from simple low-cost material so that production cost and chromatic dispersion are reduced. Moreover, different magnifications can be obtained due to a difference in focusing power of the concave mirror along XY axis direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.