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. 25, 2008
Filed:
Oct. 10, 2003
Akira Shiota, Saitama, JP;
Makoto Yasunaga, Kawagoe, JP;
Sadao Masubuchi, Chofu, JP;
Akinobu Iwako, Iruma, JP;
Masafumi Yokoyama, Tokyo, JP;
Akira Shiota, Saitama, JP;
Makoto Yasunaga, Kawagoe, JP;
Sadao Masubuchi, Chofu, JP;
Akinobu Iwako, Iruma, JP;
Masafumi Yokoyama, Tokyo, JP;
Citizen Holdings Co., Ltd., Tokyo, JP;
Abstract
The invention is directed to the provision of an exposure apparatus that can determine a correction value for each individual light-emitting part by employing a method that detects the amount of light corresponding to one particular light-emitting part from composite light containing light rays from adjacent light-emitting parts, and also to the provision of a method for producing such an exposure apparatus. The production method according to the invention comprises the steps of lighting a plurality of light-emitting parts at the same time, detecting an output light-amount distribution across all of the plurality of light-emitting parts by making measurements using a line-like light-receiving device, detecting a peak position corresponding to each light-emitting part by using the output light-amount distribution; detecting the amount of light of each light-emitting part based on the peak position, and determining, based on the amount of light of each light-emitting part, the correction value for correcting nonuniformity in the amount of light of the light-emitting part.