Dual vertically oriented triangular shaped optical retarder elem

Details Dual vertically oriented triangular shaped optical retarder elem Dual vertically oriented triangular shaped optical retarder elem

1999-01-04

1999-10-05

Pham, Hoa Q.

Optics: measuring and testing

By polarized light examination

356369, G01J 400

Patent

active

059633255

ABSTRACT:
A retarder system suitable for use in ellipsometers and polarimeters is configured from a first triangular shaped element with reflective outer surfaces, and a second triangular shaped element with reflective inner surfaces. In addition, a non-Brewster angle polarizer system suitable for use in ellipsometers and polarimeters is configured from two plates which are oriented other than parallel with respect to one another. A beam of electromagnetic radiation entered to the retarder system or polarizer system exits with a changed state of polarization, but with essentially no deviation or displacement in the direction of propagation, even when, in the case of the retarder system, it is caused to rotate about the locus of the beam of electromagnetic radiation.

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