Auxiliary illuminating device having an adjustable color temperature by controlling the amount of light passing through color filters
US6755555B2 · kind B2 · utility
5Cited by
13References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 31, 2002 |
| Grant date | Jun 29, 2004 |
| Priority date | — |
| Expiry date | Jan 31, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/22
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An auxiliary illuminating device that has an adjustable color temperature. The color temperature is adjusted by varying the light throughput of independently adjustable color filters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.