Accession Number : ADD012396

Title :   Phase-Only Optical Filter for Use in an Optical Correlation System.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Personal Author(s) : Horner,Joseph L

Report Date : 13 May 1986

Pagination or Media Count : 16

Abstract : A phase-only optical filter capable of being utilized within a phase-only optical correlation system. The phase-only optical correlation system. The phase-only optical filter is made by mathematically generating preselected phase-only information by a fast Fourier Transform technique. This generated phase-only information is transferred onto an unexposed holographic film. Therefore, the film is developed and subsequently bleached. The resultant bleached film is the phase-only filter which, when utilized in a correlation system, provides substantially 100% utilization of the source of electromagnetic radiation during the corelation process.

Descriptors :   *PATENTS, *OPTICAL CORRELATORS, *OPTICAL FILTERS, PHOTOGRAPHIC FILM, LASER BEAMS, MATCHED FILTERS, SIGNAL TO NOISE RATIO, FAST FOURIER TRANSFORMS, OPTICAL EQUIPMENT, HOLOGRAPHY

Subject Categories : Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE