Projector

Details Projector Projector

2007-12-12

2009-12-22

Martinez, Joseph (Department: 2873)

Optical: systems and elements

Single channel simultaneously to or from plural channels

By partial reflection at beam splitting or combining surface

C359S629000, C362S268000, C353S034000

Reexamination Certificate

active

07636200

ABSTRACT:
To provide a projector capable of increasing F number of an illumination system without enlarging the size of the illumination system or the like.A combining lens43aoperating in cooperation with a superimposing lens35is provided only in a first section between a first dichroic mirror41aand a red light reflection mirror42aas a bending mirror on a first optical path OP1extending from the superimposing lens35to a first liquid crystal display panel61r. Thus, the F number of an illumination system30associated with blue light can be controlled with high degree of freedom, and the number of lenses constituting a color separation and light guide system40and the illumination system30does not increase. Moreover, the incident angle of illumination light does not become large around the first liquid crystal display panel61r, and thus the telecentric characteristics of the illumination system30associated with blue light can be secured.

REFERENCES:
patent: 6863419 (2005-03-01), Kodama et al.
patent: A-2000-241882 (2000-09-01), None
patent: A-2007-057810 (2007-03-01), None

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