Detector apparatus for detecing coherent monohromatic point-source radiation
US5235405A · kind A · utility
1Cited by
5References
12Claims
0Family size
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Key dates
| Filing date | Feb 13, 1985 |
| Grant date | Aug 10, 1993 |
| Priority date | — |
| Expiry date | Feb 13, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J2003/1208
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Detector apparatus includes a dispersive prism (10) and a diffraction grating (11) of the type which produces only zero and first order diffraction patterns. Located behind the diffraction grating (11) so as to interact with the first harmonic content of the diffraction patterns is a Moire grating (12) having half the pitch of the diffraction grating (11). Detector means including at least two pairs of detectors (13-16) is located behind the Moire grating (12) to detect the presence of Moire fringes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.