Reference fringe counting fourier transform spectroscopy
US6559947B1 · kind B1 · utility
14Cited by
5References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 26, 1999 |
| Grant date | May 6, 2003 |
| Priority date | — |
| Expiry date | Aug 26, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J3/453
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Fringe counting in a Michelson type interferometer is carried out by detecting when the amplitude of the reference fringe attains a given value eg a zero crossing. Reversals in scan direction are recognized by monitoring parameters of the waveform such as amplitude and time occurence of successive half fringes and identifying a reversal by the occurrence of a particular sequence or state of the monitored parameters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.