Light collection method and apparatus
US5064269A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 18, 1990 |
| Grant date | Nov 12, 1991 |
| Priority date | — |
| Expiry date | May 18, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03F7/7055
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The device of this invention employs a short focal length anamorphic lens to collect light from a source with asymmetric angular dispersion of the flux. Focal lengths are chosen to provide an approximate line fuzzy focus with a f/number equal to or smaller than one of the associated detector. Fiber optic cable systems are used to deliver the condensed light and the diameter of the optical fibers is chosen to give a numerical aperture greater than that of the detector. The number of optical fibers in the cable should be large enough to over-fill the limiting area of the etendue of the detector. In a preferrred embodiment the fiberoptic cable is bifurcated and fibers from the separate channels are interleaved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.