Elastomeric optical interference films

Details Elastomeric optical interference films Elastomeric optical interference films

1989-04-17

1990-06-26

McCamish, Marion C.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

428212, 428215, 4284233, 4284235, 4284237, 4284744, 4284752, 428480, 350163, 350164, G02B 2700, B32B 2736, B32B 2740

Patent

active

049371347

ABSTRACT:
The present invention provides improved elastomeric interference films which are readily coextruded, have improved transparency, and have greater mismatches of refractive indices than those of the prior art. An improved elastomeric optical interference film comprising at least 100 alternating layers of at least first and second divergent substantially transparent elastomeric polymeric materials is provided. Adjacent layers of the first and second polymeric materials differ from each other in refractive index by at least about 0.05, and the thickness of the layers is from about 0.05 to about 0.5 micrometers. Stretching the films results in different wavelengths of light being reflected.

REFERENCES:
patent: 3711176 (1973-01-01), Alfrey, Jr. et al.
patent: 4310584 (1982-01-01), Cooper et al.
Radford et al., "Reflectivity of Iridescent Coextruded Multilayered Plastic Films", Polymer Engineering and Science, May, 1973.
Kimura et al, "Tunable Multilayer-Film Distributed Bragg Reflector Filter", J. Appl. Phys., vol. 50, No. 3, Mar. 1979.
B. Miller, "Technology Watch", Plastics World, Oct., 1988.

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