Fabry-Perot interference spectrometer
US4076422A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 23, 1976 |
| Grant date | Feb 28, 1978 |
| Priority date | — |
| Expiry date | Feb 23, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J3/26
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A reflecting mirror is disposed behind a single Fabry-Perot interferometer non-perpendicularly relative to the optical axis of the interferometer. The light transmitted through the interferometer parallelly to the optical axis is reflected by the reflecting mirror and, therefore, caused to pass reversely through the interferometer at an angle relative to the optical axis. In this way, a single interferometer offers two different mirror gaps, one for the light path in the forward transmission and the other for the light path in the reverse transmission through the interferometer. The forward and reverse transmission of the light through the interferometer at different mirror gaps serves to enlarge the free spectral range to a notable extent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.