Reference channel for sensing optical contamination
US4560874A · kind A · utility
10Cited by
7References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 29, 1984 |
| Grant date | Dec 24, 1985 |
| Priority date | — |
| Expiry date | May 29, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/59
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A simple lightweight apparatus for sensing excessive contamination on the faces of an array of light or infrared detectors comprises mounting a light or infrared-emitting diode near one or more of the detectors. When the diode is energized, the associated detectors should detect its radiation, thereby indicating that the detector is operable and that contamination is not excessive.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.