Wide angle viewing system
US5044738A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 11, 1989 |
| Grant date | Sep 3, 1991 |
| Priority date | — |
| Expiry date | Dec 11, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B23/16
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical system for scanning a wide angle conical field of regard through a small aperture and with a narrow field of view device includes a first optical offsetting device rotated about a first axis coincident to the axis of the conical field of regard. The first offsetting optical device receives light along a second optical axis which at a certain acute angle with respect to the first axis. A second optical offsetting device is positioned at the output side of the first device and is rotated about the second axis. The second offsetting device also receives light along a third optical axis, which is at the certain angle with respect to the second axis. The first, second and third axes intersect in front of the system in the narrow aperture through which the viewing takes place. By rotating each of the two optical offsetting devices, an entire area having a field of regard of twice the certain angle from the viewing aperture may be mapped.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.