Tunable optical structure featuring feedback control
US6310990A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 6, 2000 |
| Grant date | Oct 30, 2001 |
| Priority date | — |
| Expiry date | Mar 6, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/011
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A tunable optical device has a compression tuned optical structure and a displacement sensor. The compression tuned optical structure responds to an optical signal, and further responds to a displacement sensor signal, for providing a compression tuned optical structure signal containing information about a change in an optical characteristic of the compression tuned optical structure, and for also further providing an excitation caused by a change in a displacement of the compression tuned optical structure. The displacement sensor responds to the excitation, for providing a displacement sensor signal containing information about the change in the displacement of the compression tuned optical structure. The compression tuned optical structure may be in the form of a dogbone structure that is an all-glass compression unit having wider end portions separated by a narrower intermediate portion. The displacement sensor includes a capacitance sensor affixed to the compression tuned optical structure for measuring a change in capacitance between two parallel and opposing plates that depends on a change in a gap or an area with respect to the two parallel and opposing plates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.