Infrared background suppression
US4048500A · kind A · utility
13Cited by
3References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 8, 1976 |
| Grant date | Sep 13, 1977 |
| Priority date | — |
| Expiry date | Nov 8, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J1/1626
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system for eliminating background signals in chopped infrared measuring systems employs operational amplifier principles for subtracting a reference signal of proper amplitude, phase and frequency from the background-plus-signal radiation. The output is converted to a dc voltage level directly related to incident flux.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.