Two-beam interferometer apparatus and method, and spectrometer utilizing the same
US5196902A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 9, 1991 |
| Grant date | Mar 23, 1993 |
| Priority date | — |
| Expiry date | Oct 9, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J3/453
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A two-beam interferometer for Fourier spectroscopy comprises one or two reflecting channels, each having at least one relatively movable wall to vary the path length of a beam traversing the same. A beam passing through the channel makes multiple reflections therewithin, impinges upon a retroreflector, and is transferred back through the channel along the same path to recombine with a second beam, which can be similarly reflected. The multiple reflections that occur within the channel allow a large total path length change to be accomplished with a small degree of motion of the movable wall, to thereby achieve high levels of resolution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.