The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 01, 2001
Filed:
May. 12, 1999
Yuji Chiba, Utsunomiya, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A light-source device can efficiently cool a light source without frequently exchanging an impurity removing filter. The light-source device includes a housing having an outer wall and an inner wall. A portion within the inner wall of the housing is substantially hermetically sealed with respect to a space formed by the outer wall and the inner wall. The device also includes a light source disposed within the inner wall, and an optical member. The light source guides light supplied from the light source to a portion outside of the housing. The device further includes a cooling unit for causing a fluid to flow between the outer wall and the inner wall of the housing to cool the light source.