Infrared detector
US4755674A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 26, 1986 |
| Grant date | Jul 5, 1988 |
| Priority date | — |
| Expiry date | Sep 26, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2924/3011
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An infrared detector has at least one infrared-sensitive detector element and at least one infrared source disposed in a common housing with the detector, with the infrared radiation from the source being directed onto the detector element. A pulse generator is connected to the infrared source for pulsing the infrared radiation therefrom. A recognition circuit is connected to the detector element for identifying the pulse sequence of the detector output so as to continuously check the functioning of the detector. A number of such detector elements can be arranged in the housing, with each detector element having a respective infrared source associated therewith. The infrared source may be a heated wire, a chip resistor, or a light emitting diode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.