Optical scanner for finite conjugate applications
US5557447A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 27, 1995 |
| Grant date | Sep 17, 1996 |
| Priority date | — |
| Expiry date | Jan 27, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/0031
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical system providing a rotating scan disc including a circular array of concave reflectors on a planar surface thereof and imaging means adapted to coincide with the scanning sweep of the concave reflectors and separated from the concave reflectors by a distance equal to the focal length of the concave reflectors. A light source is provided to emit a light beam toward the circular array of concave reflectors to form an image redirected from the imaging means and the imaging means includes an objective mirror and a strip prism adapted to correct field curvature of the image. Additionally, means are provided to monitor the position of the light beam in both the scan and cross-scan directions and to reposition the light beam by movement of at least one optical component.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.