Beam splitter element including a beam splitting layer and a pol

Details Beam splitter element including a beam splitting layer and a pol Beam splitter element including a beam splitting layer and a pol

1998-02-20

2000-02-15

Sikes, William L.

Liquid crystal cells, elements and systems

Liquid crystal system

Projector including liquid crystal cell

349 11, 349 25, 359485, 359502, G02F 1135, G02B 530

Patent

active

06025890&

ABSTRACT:
A display system includes a reflective mode spatial light modulator for producing a pattern of polarized light, a light source for illuminating the spatial light modulator, and an optics arrangement. The optics arrangement includes a beam splitter element having a transparent substrate with a front face and a back face. The front face supports a beam splitter coating acting as a beam splitter. The back face supports a polarizer layer. The polarizer layer and the transparent substrate are configured to be refractive index matched to prevent the reflection of light at the interface between the transparent substrate and the polarizer layer. The beam splitter element is positioned in the optical path between the light source and the spatial light modulator in order to polarize and direct light from the light source to the spatial light modulator. The beam splitter element is also positioned in the optical path between the spatial light modulator and a desired viewing area in order to direct light from the spatial light modulator to the viewing area.

REFERENCES:
patent: 4653875 (1987-03-01), Hines
patent: 5309422 (1994-05-01), Kuroki et al.
patent: 5748369 (1998-05-01), Yokota
patent: 5751480 (1998-05-01), Kitagishi

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