Accession Number : AD0165025

Title :   Bragg Angle Colliner Heterodyning Filter.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Jernigan,James L. ; O'Neill,Thomas F. , Jr

Report Date : 10 JUL 1973

Pagination or Media Count : 4

Abstract : The patent describes a Bragg angle matched filter wherein the light rays reflected by the delay cell are combined with the modulated rays which rebound from the wave plate and travel back through the delay cell. The combined rays are converged by a lens onto an aperture. A photodetector beyond the aperture yields an output proportional to the intensity of the converged wave. Planar waves entering the lens give a maximum output from the photodetector and, therefore, indicate a correlation peak.

Descriptors :   *Matched filters, *Patents, *Heterodyning, Bragg angle, Demodulation, Coherent optical radiation, Photodetectors, Delay lines, Ultrasonics

Subject Categories : Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE