Semiconductor light position detector for rangefinder
US4850692A · kind A · utility
5Cited by
6References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 19, 1986 |
| Grant date | Jul 25, 1989 |
| Priority date | — |
| Expiry date | Jun 19, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S17/48
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A semiconductor light position detector for a rangefinder which projects a light beam onto an object and receives a reflected light beam from the object to measure a distance to the object. A portion of the light-receiving surface of the detector on which the reflected beam will not form a light spot is partially covered with a member that blocks unwanted light. Thus, the malfunctions caused by the flare component of the light from the light projector and the malfunctions due to increases in the shot noise under a high illuminance are reduced greatly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.