Temperature detection using the refractive indices of light guides
US4316388A · kind A · utility
19Cited by
5References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 14, 1980 |
| Grant date | Feb 23, 1982 |
| Priority date | — |
| Expiry date | Aug 14, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01K1/024
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A temperature detection apparatus is provided which comprises at least one light source, light guide and light detector. The light guide is placed in thermal communication with target areas whose temperatures are of interest, particularly for application in electromechanical apparatus where the target area whose temperature is of interest is relatively inaccessible and/or an electrical temperature probe would encounter interference. The light guide itself indicates temperature changes since it only transmits light when the temperature-dependent refractive index of its core exceeds that of its cladding.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.