Patent · US Expired

Optical apparatus for controlling the direction of a beam of optical radiation

US4118109A · kind A · utility

66Cited by

5References

4Claims

0Family size

Assignee

Ferranti Limited

Inventors

Ian D. Crawford · Longwood, US
Henry Bruce Marshall · West Linton, GB
Robert Cormack · Boulder, US

Key dates

Filing date	Jan 26, 1977
Grant date	Oct 3, 1978
Priority date	—
Expiry date	Jan 26, 1997

Classification

Technology area (CPC G)Physics
CPC primaryG02B26/0891
WIPO fieldOptics
WIPO sectorInstruments

Abstract

Apparatus for controlling the direction of a beam of optical radiation from, say, a laser, includes two prisms of small apex angle independently rotatable about a common axis. A control circuit is responsive to the actual angular positions of the prisms and to inputs indicating the desired beam position to cause the prisms to be moved to the appropriate positions.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.