Patent Number: 7,355,798

Title: Optical system for collimating elliptical light beam and optical device using the same

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.

Inventors: Sun; Wen-Hsin (Tu-Cheng, TW)

Assignee: Hon Hai Precision Industry Co., Ltd.

International Classification: G02B 27/30 (20060101); G02B 13/18 (20060101); G02B 3/02 (20060101); G11B 7/00 (20060101); G11B 7/135 (20060101)

Expiration Date: 2020-04-08 0:00:00