Accession Number : ADD005687

Title :   Interferogram Synthesization Method and Apparatus.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON D C

Personal Author(s) : Geary,Joseph M

Report Date : 20 Nov 1978

Pagination or Media Count : 25

Abstract : Real time presentation and evaluation of any selected interferogram is realized by electronically simulating optical aberration patterns and displaying them on a cathode ray tube (CRT). The optical aberration patterns include PISTON; X and Y TILT; DEFOCUS; SPHERICAL; COMA; and ASTIGMATISM. The aberration patterns are generated electronically in response to the CRT beam sweep drive signal and are displayed as a function of CRT beam intensity. Any combination of aberration patterns each having selectable coefficients, can be displayed. The aberration pattern coefficient values are indicated by a digital readout. Evaluation of an unknown interferogram is accomplished by varying aberration pattern combinations and coefficients until a substantial match with the unknown interferogram is achieved. The contributing aberration patterns are then known and their magnitudes are determined from the digital read-out. (Author)

Descriptors :   *Patent applications, *Interferograms, *Cathode ray tube screens, Display systems, Signal processing, Real time, Digital systems

Subject Categories : Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE