Polarization independent beam splitter

Details Polarization independent beam splitter Polarization independent beam splitter

1983-01-03

1985-01-08

Punter, William H.

350401, 350405, G02F 101

Patent

active

044924364

ABSTRACT:
A new type of beam splitter is described, which is capable of producing a division of light in a polarization independent manner. Typical beam splitters (used off-axis) have a pronounced polarization dependence. The device is a thin plate of suitably oriented, birefringent material having a thickness chosen to interchange the characteristic polarizations of the beam between the faces of the plate. The reflection/refraction ratio at the two boundaries are then complementary and the combined effect is insensitive to the polarization of the incident beam.

REFERENCES:
patent: 3510198 (1970-05-01), Pace
patent: 3675986 (1972-07-01), Yamamoto et al.
patent: 3677621 (1972-07-01), Smith
patent: 4084883 (1978-04-01), Eastman et al.

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