Accession Number : ADD005604

Title :   Narrow Angle, Narrow Bandwidth Optical Receiver System.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Ferguson,Gerald D

Report Date : 06 Jun 1978

Pagination or Media Count : 6

Abstract : A narrow angle, narrow bandwidth optical receiver system for detecting light rays reflected from a predetermined area illuminated by a laser beam having a known wavelength. A large collecting lens having a small field of view receives incoming reflected rays which are collimated by a pair of relay lenses having a narrow bandwidth, triple cavity, single element interference filter positioned therebetween. The filtered rays are processed by a photomultiplier tube and a CRT display to illustrate signals of interest within the illuminated area. An alternate embodiment provides a cone element to receive filtered rays from relay lenses for decreasing the size of the receiver system. (Author)

Descriptors :   *Patents, *Optical equipment, *Receivers, *Laser beams, Narrowband, Optics, Signals

Subject Categories : Lasers and Masers

Distribution Statement : APPROVED FOR PUBLIC RELEASE