Patent ID: 7349003
Filing Date: 2008-03-25
Classification: B41J,G06K

Abstract:
1. A correction method for exposure apparatus including an exposure head having a plurality of light-emitting parts and a control means for controlling said exposure head, said method comprising the steps of: lighting all of odd-numbered ones of said plurality of light-emitting parts at the same time; lighting all of even-numbered ones of said plurality of light-emitting parts at the same time; detecting a first output light-amount distribution occurring when all of the odd-numbered ones of said plurality of light-emitting parts are lighted at the same time, by making measurements using a line-like light-receiving device; detecting a second output light-amount distribution occurring when all of the even-numbered ones of said plurality of light-emitting parts are lighted at the same time, by making measurements using a line-like light-receiving device; detecting a first peak position by using said first output light-amount distribution; detecting a second peak position by using said second output light-amount distribution; combining said first peak position and said second peak position so as to make a combined peak position; detecting the amount of light of each of said plurality of light-emitting parts based on said combined peak position; and determining, based on the amount of light of said each light-emitting part, a correction value for correcting non-uniformity in the amount of light of said each light-emitting part.