Optical system for the reproduction of color video images

Details Optical system for the reproduction of color video images Optical system for the reproduction of color video images

1992-11-10

1993-12-21

Lerner, Martin

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 24, 359 49, G02B 532, G02B 2744, G02F 11335

Patent

active

052725510

ABSTRACT:
The present invention concerns an optical system for the reproduction of color video images, comprising a source of illumination (1), an electro-optical modulator (3) formed from pixels associated with the colors red, green, and blue respectively, and optical collimation means (2) used to illuminate the entirety of the modulator. This system further comprises a series of wavelength-selective holographic lenses (6) making it possible to focus the light of each red, green, or blue component on the associated pixels of the modulator. Applications to videoprojectors and direct viewing.

REFERENCES:
patent: 3622219 (1971-11-01), Groh
patent: 3695744 (1972-10-01), Clay
patent: 3716658 (1973-02-01), Rackman
patent: 4082415 (1978-04-01), Brooks et al.
patent: 4235505 (1980-11-01), Hariharan et al.
patent: 4447111 (1984-05-01), Leib
patent: 4722037 (1988-01-01), Davis
patent: 4807978 (1989-02-01), Grinberg et al.
patent: 5011244 (1991-04-01), Smith et al.

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