Light tunnel with gradient filter layer

Details Light tunnel with gradient filter layer Light tunnel with gradient filter layer

2007-10-30

2007-10-30

Lee, Diane (Department: 2851)

Optics: image projectors

Color filter

C353S122000, C353S099000, C353S037000, C362S026000, C362S551000, C396S267000, C359S894000, C359S850000, C385S133000

Reexamination Certificate

active

11110751

ABSTRACT:
A light tunnel with a gradient filter layer includes a light tunnel body and a gradient filter layer. In this case, the gradient filter layer is disposed at a light emerging side. The transmission rate at the central area of the gradient filter layer is smaller than the transmission rate at the edge area of the gradient filter layer.

REFERENCES:
patent: 5625738 (1997-04-01), Magarill
patent: 5947577 (1999-09-01), Jikihara et al.
patent: 6139156 (2000-10-01), Okamori et al.
patent: 6856727 (2005-02-01), Li
patent: 7029130 (2006-04-01), Cannon et al.
patent: 7090357 (2006-08-01), Magarill et al.
patent: 2005/0012903 (2005-01-01), Drazic et al.

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