Fourier transform spectrometer using an optical block
US6836333B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 21, 2002 |
| Grant date | Dec 28, 2004 |
| Priority date | — |
| Expiry date | Apr 13, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J3/453
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention concerns an interferometric optical block for Fourier Transform spectrometers having three planar nominally parallel surfaces with the two outer surfaces adapted to act as beam reflectors for internal light and the third surface in operation acting as a beam splitter and beam combiner, the optical block having an input portion by means of which an input beam of light to be analysed can be input so as partially to pass through said third surface to be internally reflected by one of said outer reflectors, and partially to be reflected by said third surface so as then to be internally reflected by the other of said outer reflectors whereby light internally reflected by said outer reflectors is combined at said third surface to produce an exit beam, and wherein said outer surfaces have an inclination with respect to one another so as to make a variation in path lengths in the light forming the exit beam so as to generate an interference fringe field.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.