Arrangement for sensing the wavelength shift of light from a polychromatic light source
US5495332A · kind A · utility
1Cited by
3References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 30, 1994 |
| Grant date | Feb 27, 1996 |
| Priority date | — |
| Expiry date | Aug 30, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J3/36
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An arrangement for sensing the wavelength shift of light from a polychromatic light source features a tilted concave holographic reflection grating that diffracts light from the light source and disperses the light across the focal plane of the arrangement. A pair of matched detectors disposed behind the focal plane senses the light transmitted by a variable neutral density filter at the focal plane. The difference in output signal electrical currents generated by the detectors is a measurement of the shift in polychromatic wavelength distribution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.