Optical: systems and elements – Polarization without modulation – Polarizarion by dichroism
Reexamination Certificate
2005-08-23
2005-08-23
Shafer, Ricky D. (Department: 2872)
Optical: systems and elements
Polarization without modulation
Polarizarion by dichroism
C359S490020, C359S506000, C359S599000, C362S019000, C313S112000, C313S116000
Reexamination Certificate
active
06934082
ABSTRACT:
Optical devices using reflective polarizers and, in particular, diffusely reflective polarizers are provided. Many of the optical devices utilize the diffusely reflecting and specularly transmitting properties of diffusely reflecting polarizers to enhance their optical characteristics. The optical devices include a lighting system which uses a reflector formed from a diffusely reflecting polarizer attached to a specular reflector. Another optical device is a display apparatus which uses a diffusely reflecting polarizer layer in combination with a turning lens which folds shallow angle light toward a light modulating layer. Other optical devices exploit the depolarizing characteristics of a diffusely reflecting polarizer when reflecting light. Still other optical devices use diffusely reflecting polarizers to recycle light and improve display illumination.
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Allen Richard C.
Cobb, Jr. Sanford
Cross Elisa M.
Kent Susan L.
Nevitt Timothy J.
3M Innovative Properties Company
Kobilansky Anna A.
Shafer Ricky D.
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