Optical system for collimating elliptical light beam and...

Details Optical system for collimating elliptical light beam and... Optical system for collimating elliptical light beam and...

2008-04-08

2008-04-08

Harrington, Alicia M (Department: 2873)

Optical: systems and elements

Collimating of light beam

C359S719000, C369S044230, C369S112010

Reexamination Certificate

active

07355798

ABSTRACT:
An optical system (20) for efficiently collimating an elliptical light beam includes a light source (21), a collimator (22), and at least one prism (23,24). The light source is adapted for providing an elliptical light beam defining different diverging angles in different directions, wherein any cross-section of the elliptical light beam emitted from the light source defines a long axis and a short axis which are perpendicular to each other. The at least one prism is used for reconfiguring the elliptical light beam, thus obtaining a parallel round light beam having equivalent short axis and long axis.

REFERENCES:
patent: 5107477 (1992-04-01), Fujita et al.
patent: 6154433 (2000-11-01), Hoshino et al.
patent: 6496453 (2002-12-01), Asada et al.
patent: 2001/0046092 (2001-11-01), Maruyama et al.
patent: 2004-171629 (2004-06-01), None

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