Silicon coated mylar beamsplitter

Details Silicon coated mylar beamsplitter Silicon coated mylar beamsplitter

1994-11-30

1996-09-24

Sweet, Mark D.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Physical dimension specified

428336, 428458, 428480, B32B 516

Patent

active

055589340

ABSTRACT:
The invention disclosed relates to a composite material for use in a beamsplitter for the far infrared which provides a high operating efficiency over the spectral range of 50 to 550 cm.sup.-1. The composite comprises a thin, substantially uniformly thick synthetic resin film having low far infrared absorption, preferably polyethyleneterephthalate, and a thin substantially uniformly thick coating of a transparent material having an index of refraction of about twice that of the substrate, preferably of germanium. An improved interferometer including a beamsplitter formed of the composite is also disclosed.

REFERENCES:
patent: 4388400 (1983-06-01), Tabei et al.
patent: 5049462 (1991-09-01), Funhoff et al.
patent: 5273815 (1993-12-01), Brydon et al.

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