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:
Mar. 24, 2009
Filed:
Jun. 08, 2006
Kazunari Sekigawa, Nagano, JP;
Hiroaki Samizu, Nagano, JP;
Takahiro Inoue, Nagano, JP;
Shinko Electric Industries Co., Ltd., Nagano, JP;
Abstract
A surface light source control apparatus for a direct exposure apparatus comprises a light-emission level determining means for determining the light-emission level of each point light source for each of a plurality of groups so that a uniform illuminance distribution is achieved at a position corresponding to an exposure surface of an exposure target when a projection device is set so as to reflect all light rays incident thereon toward the exposure surface, the plurality of groups being formed in advance by grouping the point light sources based on similarity in tendency in terms of illuminance distribution characteristics that the point light sources have at the position corresponding to the exposure surface, wherein the light-emission level determining means determines the light-emission level so that all the point light sources belonging to the same group have the same light-emission level.