Method and apparatus for calibrating optical sensors
US4836682A · kind A · utility
12Cited by
5References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 2, 1986 |
| Grant date | Jun 6, 1989 |
| Priority date | — |
| Expiry date | Jul 2, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S7/497
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A self calibrating optical sensor is described in which a time varying response signal is provided which is a function of the reflectivity of a surface being detected and the overall response of the photodetector circuit. This response time is stored to establish a reference value to ascertain similar reflective surface are present.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.