Variable attenuator for optical transceiver
US4530600A · kind A · utility
35Cited by
15References
1Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 22, 1982 |
| Grant date | Jul 23, 1985 |
| Priority date | — |
| Expiry date | Feb 22, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S7/499
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A variable attenuator for optical transceivers such as laser rangefinders for ordnance control. A polarization rotation device, such as a mechanically rotatable half-wave plate or an electrooptic cell, operates in combination with a beam splitter polarizer to attenuate the transmitted laser beam by a continuously variable amount without further attenuating the received laser beam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.