Illuminating optical system for projector including first...

Details Illuminating optical system for projector including first... Illuminating optical system for projector including first...

2011-04-26

2011-04-26

Epps, Georgia Y (Department: 2878)

Optics: image projectors

Polarizer or interference filter

C353S019000, C359S483010

Reexamination Certificate

active

07931375

ABSTRACT:
An illuminating optical system that includes a first integrator that includes a plurality of lens, a second integrator that includes a plurality of lens cells on which the respective partial luminous fluxes are incident, a polarization converting element that uniformizes polarizing directions of the luminous fluxes that have passed through the respective lens cells of the second integrator, and color separating unit that separates each of the luminous flux from the polarization converting element into a plurality of color lights of different wavelengths. A field lens and a condenser lens are arranged between the polarization converting element and the separating unit to superimpose the luminous fluxes that have passed through the respective lens cells of the first integrator, on the plurality of display panels. The condenser lens is located closer to the color separating unit.

REFERENCES:
patent: 6893131 (2005-05-01), Imahase et al.
patent: 2005/0237488 (2005-10-01), Yamasaki et al.
patent: 2001-228440 (2001-08-01), None
patent: 2004-45907 (2004-02-01), None

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