Reciprocating variable optical attenuator filter
US4702549A · kind A · utility
17Cited by
2References
9Claims
0Family size
Inventors
Key dates
| Filing date | Aug 16, 1984 |
| Grant date | Oct 27, 1987 |
| Priority date | — |
| Expiry date | Aug 16, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/266
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A simple variable optical attenuator or the like suitable for printed circuit board mounting has an optical filter slab positionable between the arc-rounded aligned ends of two optical fibres. The filter slab is mounted on the wiper carrying reciprocating part of an adjustable potentiometer. The resistance value corresponds to the position of the filter slab, i.e. to the attenuation or other optical index as the case may be, once the unit has been calibrated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.