Optical scanning system including a rotatable drum with mirrors and including a rotatable optical shutter
US4458982A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 24, 1982 |
| Grant date | Jul 10, 1984 |
| Priority date | — |
| Expiry date | Mar 24, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/09
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical scanning system includes scanning means arranged to scan an object field and comprising, in one form, a rotatable drum (10) carrying a plurality of pairs of mirrors (12, 13). A detector (21) is provided which is sensitive to optical radiation directed on to it by the scanning means. Means, such as telescopes (17, 22) collect radiation from at least two fields of view for presentation to the object field of the scanning means. Optical switching means are provided so that radiation reaches the detector (21) from each field of view in turn. The switching means may be an optical shutter (14) having reflective regions (15) and transparent regions (16).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.