Optical filter and the method of preparing the same

Details Optical filter and the method of preparing the same Optical filter and the method of preparing the same

1985-03-12

1988-02-16

McCamish, Marion C.

Stock material or miscellaneous articles

Liquid crystal optical display having layer of specified...

With charge transferring layer of specified composition

1563082, 1563099, 428212, 428910, B29D 724, C08G 518

Patent

active

047254602

ABSTRACT:
This invention provides an optical filter comprises of a pair of solid polymer films, wherein (1) a first solid polymer film has a planar alignment of a cholesteric liquid crystal structure of either clockwise or counterclockwise helical structure, which alignment allows the light of a specified wavelength to be scattered selectively, and (2) a second solid polymer film has a planar alignment of a cholesteric liquid crystal structure of a helical structure whose helical direction is the opposite to that of the first solid polymer film, which alignment allows the light at the specified wavelength to be scattered selectively, wherein the optical axes of the first and second solid polymer films are made substantially parallel to each other.
This invention also provides preparation methods of an optical filter mentioned above.

REFERENCES:
patent: 4384016 (1983-05-01), Ide et al.

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