Composite variable light attenuator
US9442293B2 · kind B2 · utility
4Cited by
3References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 6, 2014 |
| Grant date | Sep 13, 2016 |
| Priority date | — |
| Expiry date | Sep 28, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/0178
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical stack includes a first variable element and a second variable element. The first variable element is configured to vary light transmission through the first variable element as a function of a first control signal. The second variable element is in series with the first variable element and is configured to vary light transmission through the second variable element as a function of a second control signal. A controller dynamically supplies the first control signal to the first variable element and supplies the second control signal to the second variable element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.