Unabsorbing type polarizer, method for manufacturing the same, p

Details Unabsorbing type polarizer, method for manufacturing the same, p Unabsorbing type polarizer, method for manufacturing the same, p

1991-07-01

1992-10-20

Howell, Janice A.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359487, 359488, 359495, 359497, G02F 11335, G02B 530, G02B 2728

Patent

active

051575264

ABSTRACT:
The polarizer of the present invention is composed of mediums having different refractive indices, by which ordinary light in incidented light is wholly reflected at a boundary between laminated medium I and medium II and extraordinary light is transmitted through the medium II. The medium II is so arranged as to be almost 45.degree. to the light axis, and thickness of the medium II is selected as a value with which the medium II works as a half wave length plate to the transmitting light. The polarizer, which has high transparency by reduction of absorption and is able to make most of incident light be similarly polarized light, is obtained. A polarizer for and apparatus for bright liquid crystal display, which is able to be enlarged to a large size display without light absorption, can be provided.

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