Scanner/plotter optical system
US4516023A · kind A · utility
9Cited by
2References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 3, 1982 |
| Grant date | May 7, 1985 |
| Priority date | — |
| Expiry date | Jun 3, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/04746
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A laser beam scanner with encoder and a laser beam plotter with encoder are disclosed. The scanner provides for unsharp masking by alternating between a large scan beam and a small scan beam on alternate scans. Compensation for non-straight scan lines is achieved through a small linear galvonometer placed in the scanning optics. An equal conjugate optical system is utilized to allow encoder information to be obtained from a stationary image of the main scanning and plotting galvonometer mirror.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.