Method and apparatus for determining the polarization state of a

Details Method and apparatus for determining the polarization state of a Method and apparatus for determining the polarization state of a

1982-03-18

1985-05-14

Willis, Davis L.

Optics: measuring and testing

By polarized light examination

With polariscopes

356369, 358 82, 358107, G01J 404

Patent

active

045168555

ABSTRACT:
The local state of polarization of a light wave field is determined by measuring the radiation transmitted by one or several polarizers with three different azimuth angles. A modified TV camera is used having its usually provided tri-color filters replaced by polarization filters whose azimuth angles differ from each other by 60.degree. respectively. On a connected color monitor, the local polarization state can be concluded from the local brightness, the hue, and the saturation. The polarization camera can preferably be used for ellipsometric measurings, in an interferometric system for surface topography, and in interferometric holography. The display of the polarization state of the color monitor can be supplemented by electronic means, e.g. emphasizing points having the same state of polarization.

REFERENCES:
patent: 3631254 (1971-12-01), Covault
patent: 3864513 (1975-02-01), Halajian et al.
patent: 4085421 (1978-04-01), Gilmour

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