Beam scanning apparatus with sensor for detecting beam position
US5173798A · kind A · utility
5Cited by
7References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 20, 1991 |
| Grant date | Dec 22, 1992 |
| Priority date | — |
| Expiry date | Nov 20, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B26/126
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A beam scanning apparatus comprises: a beam source for generating optical beam; a polygon mirror for deflecting the optical beam to scan a beam receiving surface; a beam receiving device, arranged at a position inequivalent to the beam receiving surface, for detecting the optical beam which is deflected by the polygon mirror; and an aspherical lens, arranged in front of the beam receiving device, for converging optical beam on the beam receiving device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.