Polarization control system

Details Polarization control system Polarization control system

1991-01-03

1993-03-02

Rosenberger, Richard A.

Optics: measuring and testing

Material strain analysis

With polarized light

356364, 356368, 385 1, G01B 1118, G01J 400

Patent

active

051913879

ABSTRACT:
A polarization is controlled by introducing a phase difference in an incident light at first, then introducing a phase difference by 45 degrees, and then the polarized light is rotated. The light is passed through an analyzer so arranged that the direction of the transmission axis of the analyzer does not coincide with the principal axes of the means for introducing the phase differences, thereby to convert the polarized condition into a light volume which is used to control the phase differences and the rotation.

REFERENCES:
patent: 2976764 (1961-03-01), Hyde et al.
patent: 3520617 (1970-07-01), Webb
patent: 3645603 (1972-02-01), Smith
patent: 5004312 (1991-04-01), Shimizu
patent: 5052786 (1991-10-01), Schulz

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