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. 27, 2003
Filed:
Mar. 13, 2001
Applicant:
Inventor:
Yoshio Okazaki, Himeji, JP;
Assignee:
Ushiodenki Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J 6/100 ;
U.S. Cl.
CPC ...
H01J 6/100 ;
Abstract
A lamp unit ( ) for use with digital micromirror devices has a direct current short arc discharge lamp ( ) in which at least 0.15 mg/mm of mercury is sealed. A short focal length, elliptical reflector mirror ( ) both covers the discharge lamp ( ) and positions the axis of radiation roughly in line with the long axis of the discharge lamp, such that the short arc discharge lamp ( ) is placed with the cathode ( ) in a front opening of the reflector mirror ( )