Measuring apparatus
US4417815A · kind A · utility
6Cited by
1References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 8, 1981 |
| Grant date | Nov 29, 1983 |
| Priority date | — |
| Expiry date | Dec 8, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J9/04
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Apparatus for measuring or detecting changes in a variety of physical or chemical parameters comprises an interferometer having a transmission frequency variable over a range of frequencies as a function of changes in the parameter. The transmission frequency is measured by beating with a coherent reference frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.