Optical: systems and elements – Polarization without modulation – By relatively adjustable superimposed or in series polarizers
Patent
1997-02-28
2000-08-29
Schuberg, Darren E.
Optical: systems and elements
Polarization without modulation
By relatively adjustable superimposed or in series polarizers
359494, 359500, 349 96, G02B 530
Patent
active
061116963
ABSTRACT:
An optical film is provided which comprises a disperse phase of polymeric particles disposed within a continuous birefringent matrix in combination with light directing materials to enable control of light emitted from a lighting fixture or display. The film is oriented, typically by stretching, in one or more directions. The size and shape of the disperse phase particles, the volume fraction of the disperse phase, the film thickness, and the amount of orientation are chosen to attain a desired degree of diffuse reflection and total transmission of electromagnetic radiation of a desired wavelength in the resulting film, and the light directing materials are chosen to control the direction of polarized light reflected from or transmitted by the optical film.
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Allen Richard C.
Carlson Lockwood W.
Kotz Arthur L.
Majumdar Biswaroop
Nevitt Timothy J.
3M Innovative Properties Company
Fortkort John A.
Schuberg Darren E.
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