Interferogram synthesization method and apparatus

Details Interferogram synthesization method and apparatus Interferogram synthesization method and apparatus

1978-11-20

1980-12-09

Krass, Errol A.

Boots, shoes, and leggings

340720, 356359, 356363, 358107, 364525, 364578, G01B 1100

Patent

active

042388279

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.

REFERENCES:
patent: 1565533 (1925-12-01), Twyman et al.
patent: 3537096 (1970-10-01), Hatfield
patent: 3544833 (1970-12-01), Miura et al.
patent: 3649754 (1972-03-01), Macovski
patent: 3879988 (1975-04-01), Jacobs
patent: 3932949 (1976-01-01), King
patent: 3988728 (1976-10-01), Inoue et al.
patent: 4075620 (1978-02-01), Passavant et al.

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