Optical color-splitter arrangement
US5165079A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 29, 1991 |
| Grant date | Nov 17, 1992 |
| Priority date | — |
| Expiry date | Jul 29, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J2003/1213
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An optical color-splitter arrangement comprises a color splitter for spectral resolution of a light beam into at least two chromatic light beams of different spectral ranges. A correction device is arranged in each of the chromatic light beams for improving a color selectivity of the color splitter. Each of the correction devices has at least two dichroitic mirrors successively arranged on an optical axis of the respective chromatic light beam, each dichrotic mirror being arranged relative to the optical axis so as to define a normal operating position angle of incidence for the corresponding dichroitic mirror. Spectral filter curves of the at least two dichroitic mirrors for each correction device are selected such that one of the two dichroitic mirrors reflects a short-wave light component and the other dichroitic mirror reflects a long-wave light component of the spectral range of the corresponding light beam so that a resulting light component allowed to pass through the corresponding correction device forms a light beam having a constricted spectral range. This spectral range can be precisely set in a simple way and can always be precisely reproduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.