Compact optical wavelength discriminator radiometer
US4746798A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 18, 1986 |
| Grant date | May 24, 1988 |
| Priority date | — |
| Expiry date | Aug 18, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J2005/607
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A wavelength discriminator designed to collect broadband, multiple wavelength input energy, to isolate specific narrow bands of interest, and to image such narrow bands of interest upon closely spaced, separate detectors. This discriminator comprises optical devices (22, 18) for directing incoming radiant energy of a certain quality and involving a wide range of wavelengths through first (26a) and second (26b) wavelength selective reflectors separated by a medium that transmits the wavelengths of interest. The wavelength selective reflectors in accordance with this invention are in a non-parallel configuration and disposed in a double pass geometrical arrangement wherein energy of a certain wavelength reflected from the second wavelength selective reflector (26b) passes back through the first wavelength selective reflector (26a), with the energy from the first and second wavelength reflectors thereafter being directed onto respective detectors (32aand 32b). An embodiment involving a third wavelength selective reflector (26c) grouped with the first and second reflectors may be utilized, wherein energy of a different wavelength reflected from the third wavelength selective reflector …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.