Two-element zoom lens for beam separation error correction
US5469290A · kind A · utility
14Cited by
1References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 6, 1994 |
| Grant date | Nov 21, 1995 |
| Priority date | — |
| Expiry date | Jun 6, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B26/124
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A raster output scanner is disclosed which utilizes a spot separation error correction system prior to its rotating polygon mirror. The spot separation error correction system of this invention is a zoom system which comprises two axially adjustable lenses. By moving the two lenses in a pre-determined relationship with each other, the magnification on the rotating polygon can be modified and as a result the spot separation on the photoreceptor can be substantially corrected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.