Dichroic beam combiner utilizing blue LED with green phosphor

Details Dichroic beam combiner utilizing blue LED with green phosphor Dichroic beam combiner utilizing blue LED with green phosphor

2006-12-05

2006-12-05

Dowling, William C. (Department: 2851)

Optics: image projectors

Plural

C362S231000, C362S800000, C359S634000

Reexamination Certificate

active

07144121

ABSTRACT:
A white beam with high color-rendering index is formed by uniting a collimated red beam and a collimated blue-green beam, the latter having as its source a blue LED with a green phosphor. The white beam is formed by a prism with an amber low-pass dichroic filter. The prism cross-section can be either a square or an equilateral triangle. The triangular prism can have one third of its mass reduced by stepped facets. Both types of prism can be elongated to accommodate multiple collimators. Switching between white, red, and blue-green allows application to police vehicles.

REFERENCES:
patent: 5343330 (1994-08-01), Hoffman et al.
patent: 5438453 (1995-08-01), Kuga
patent: 5453877 (1995-09-01), Gerbe et al.
patent: 5580142 (1996-12-01), Kurematsu et al.
patent: 5600487 (1997-02-01), Kiyomoto et al.
patent: 5699186 (1997-12-01), Richard
patent: 6097549 (2000-08-01), Jenkins et al.
patent: 6139166 (2000-10-01), Marshall et al.
patent: 6252636 (2001-06-01), Bartlett
patent: 6547400 (2003-04-01), Yokoyama
patent: 6554455 (2003-04-01), Perlo et al.
patent: 6641287 (2003-11-01), Suehiro
patent: 6692136 (2004-02-01), Marshall et al.
patent: 6729746 (2004-05-01), Suehiro et al.
patent: 6769772 (2004-08-01), Roddy et al.
patent: 6830359 (2004-12-01), Fleury
patent: 6848820 (2005-02-01), Natsume
patent: 6863402 (2005-03-01), Roddy et al.
patent: 6882379 (2005-04-01), Yokoyama et al.
patent: 6886962 (2005-05-01), Suehiro
patent: 6926435 (2005-08-01), Li
patent: 6948836 (2005-09-01), Ishida et al.
patent: 6953265 (2005-10-01), Suehiro et al.
patent: 6997587 (2006-02-01), Albou
patent: 2004/0125614 (2004-07-01), Ishida et al.
patent: 2004/0190304 (2004-09-01), Sugimoto et al.
patent: 2005/0135095 (2005-06-01), Geissler
patent: 2005/0200812 (2005-09-01), Sakata et al.
patent: 2005/0219464 (2005-10-01), Yamasaki et al.
Georg Glaeser, et al., “Reflections on Refraction” AMS, Sep. 5, 2001, pp. 1-18.
International Search Report and Written Opinion, PCT/US2004/038162, mailed Nov. 30, 2005.

Affiliated with

Also associated with

Rating

Dichroic beam combiner utilizing blue LED with green phosphor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Dichroic beam combiner utilizing blue LED with green phosphor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dichroic beam combiner utilizing blue LED with green phosphor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3656028