Optical system for display apparatus

Details Optical system for display apparatus Optical system for display apparatus

1993-03-24

1995-01-03

LaRoche, Eugene R.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 41, 359 66, 359 72, 359 93, 359246, G02F 113, H04N 930

Patent

active

053791355

ABSTRACT:
An optical system is disclosed which is for a display apparatus having a light source for emitting read light and a reflection type spatial light modulator for modulating the read light incoming thereto into in accordance with image written thereon. The modulated light is projected onto a screen by a projection lens to display the image. A field lens is provided between the modulator and screen at such a position that both the read and modulated light pass therethrough. The field lens focuses the modulated light on near an entrance pupil of the projection lens so that the intensity of the modulated light is increased.

REFERENCES:
patent: 4707077 (1987-11-01), Marom
patent: 5071230 (1991-12-01), Hatano
patent: 5083854 (1992-01-01), Zampolin
patent: 5130826 (1992-07-01), Takanashi
patent: 5142387 (1992-08-01), Shikama
patent: 5142391 (1992-08-01), Fujiwara
patent: 5144463 (1992-09-01), Hatano
patent: 5260815 (1993-11-01), Takizawa

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