Accession Number : ADD008058

Title :   Interferogram Synthesization Method and Apparatus.

Descriptive Note : Patent,


Personal Author(s) : Geary,Joseph M ; Holmes,David F

Report Date : 09 Dec 1980

Pagination or Media Count : 17

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 :   *Patents, *Simulators, *Interferograms, *Display systems, Cathode ray tubes, Read out techniques, Digital systems, Beams(Radiation), Astigmatism, Distortion, Coefficients, Intensity, Patterns, Optics, Value, Time

Subject Categories : Electrooptical and Optoelectronic Devices
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE