Backlighting system using a retroreflecting polarizer

Details Backlighting system using a retroreflecting polarizer Backlighting system using a retroreflecting polarizer

1992-05-18

1995-06-06

Shafer, Ricky D.

Optical: systems and elements

Polarization without modulation

Polarizarion by dichroism

359490, 359494, 359529, 359589, 362 19, G02B 530

Patent

active

054227569

ABSTRACT:
A backlighting system employs a retroreflecting polarizer, comprising optical thin films coated on a structured material, to divide an incident beam of light into polarized components. One component is transmitted through the polarizer and the other is rejected. Optionally, a reflector (for example, a diffuser with a reflective layer) may be used; or, an absorbing polarizer may be added; or, a birefringent material may be included in the system.

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