Illumination optical system and image projection device...

Details Illumination optical system and image projection device... Illumination optical system and image projection device...

2011-05-17

2011-05-17

Le, Que T (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

C250S216000

Reexamination Certificate

active

07943893

ABSTRACT:
An illumination optical system has: a light source, a diffusion member, and a rod integrator, and illuminates an image display surface of a display element. The light source emits an illumination beam having a flat cross section. The diffusion member isotropically diffuses the illumination beam. The rod integrator uniformizes spatial energy distribution of the illumination beam put into a diffused state by the diffusion member.

REFERENCES:
patent: 5704700 (1998-01-01), Kappel et al.
patent: 6057894 (2000-05-01), Kobayashi

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