Photodensitometer for measuring optical fringe patterns

Details Photodensitometer for measuring optical fringe patterns Photodensitometer for measuring optical fringe patterns

1974-11-18

1976-07-06

Smith, Alfred E.

Optics: measuring and testing

Refraction testing

Prism engaging specimen

356106R, G01B 1100

Patent

active

039679039

ABSTRACT:
A non-storage type image pick-up tube line scans a sample for picking up the fringes. A circuit responds to the maximum and minimum values of the output from the image pick-up tube generating a signal corresponding to the brightness of the fringes, signals corresponding to the positions of the bright and/or dark spots of the fringes, and signals corresponding to the spacings between a reference point and the positions of the bright and/or dark spots of the fringes.

REFERENCES:
patent: 3527537 (1970-09-01), Hobrough
patent: 3549870 (1970-12-01), Lay
patent: 3644046 (1972-02-01), Ryan
patent: 3661464 (1972-05-01), Hubbard
patent: 3771875 (1973-11-01), Russo

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