Light guiding apparatus for an illumination system

Details Light guiding apparatus for an illumination system Light guiding apparatus for an illumination system

2006-03-21

2006-03-21

Tso, Laura K. (Department: 2875)

Illumination

Light source and modifier

Including reflector

C362S298000, C353S099000, C353S033000

Reexamination Certificate

active

07014342

ABSTRACT:
The light-guiding apparatus has a light tunnel and an ellipsoidal reflector. Light emitted from the light tunnel is reflected and focused on a DMD chip by the ellipsoidal reflector. The light tunnel and a long axis of the ellipsoidal reflector form an angle. The angle and an eccentricity of the ellipsoidal reflector are used to modify the light emitted from the light tunnel. Thus, the light is made to match an incident angle and an effective dimension of a digital micro-mirror device receiving the light.

REFERENCES:
patent: 6883922 (2005-04-01), Kurematsu et al.
patent: 2004/0150793 (2004-08-01), Chang et al.
patent: 2004/0201898 (2004-10-01), Chang et al.

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