Image projecting apparatus

Details Image projecting apparatus Image projecting apparatus

1995-10-26

1998-09-01

Dowling, William

Optics: image projectors

Light shield, mask, hood, or diaphragm

G03B 2114

Patent

active

058000330

ABSTRACT:
An image projecting apparatus comprises a light source for emitting light, a spatial light modulating element, an illuminating optical system for irradiating a light from the light source to the spatial light modulating element, and a projecting optical system for projecting an image of the spatial light modulating element. The illuminating optical system or the projecting optical system comprises a telecentric optical system and a light shielding frame disposed at a focus position of the telecentric optical system for controlling an angular component of a luminous flux of light emitted by the light source or the spatial light modulating element, respectively, to adjust the quality of the projected image.

REFERENCES:
patent: 5371559 (1994-12-01), San-Nohe et al.
patent: 5379083 (1995-01-01), Tomita
patent: 5541679 (1996-07-01), Yang

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