Area sensor with optical axis having narrow angular characteristics
US6239423A · kind A · utility
22Cited by
6References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 9, 1999 |
| Grant date | May 29, 2001 |
| Priority date | — |
| Expiry date | Jun 9, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V8/20
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An area sensor including a light emitter having a plurality of light emitting devices that emit rays of light and a light receiver having light receiving devices that respectively correspond to the light emitting devices for receiving the rays of light therefrom. In the area sensor, the light emitting device and/or the light receiving device that provides at least one of the optical axes formed by sets of the light emitting devices and the corresponding light receiving devices is adapted to have narrower angular characteristics than the light emitting devices and/or the light receiving devices that provide the other optical axes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.