Controllable light angle selector
US8184280B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 2009 |
| Grant date | May 22, 2012 |
| Priority date | — |
| Expiry date | Mar 31, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2207/123
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Disclosed is a controllable light angle selecting device that includes a fixed light selecting means for transmitting light within a limited acceptance angle, optically connected to at least one light redirecting means capable of achieving a variable angular difference between light entering said light redirecting means and light exiting said light redirecting means. Also disclosed is a photometer employing such controllable light angle selecting device and arranged in the path of light between a light source and at least one light measuring sensor arranged to receive at least part of the light exiting from the controllable light angle selecting device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.