Interferometric thermal detector
US4785174A · kind A · utility
6Cited by
1References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 28, 1987 |
| Grant date | Nov 15, 1988 |
| Priority date | — |
| Expiry date | Jan 28, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J2005/066
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An interferometric sensor (10) employs a sensing optical fiber (12) and a reference optical fiber (14). The sensing fiber (12) has a coating 16 thereon responsive to radiated thermal energy while the reference fiber is shielded therefrom. Both the sensing and reference fibers are subjected to the same ambient environment so that both fibers are subjected to heating by convection or conduction in essentially the same amounts. As a result, the sensor (10) is substantially nonresponsive to convected or conducted thermal energy while being highly responsive to radiated energy, particularly in the 6-30 micron wavelength region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.