| 摘要 |
<P>PROBLEM TO BE SOLVED: To shorten time required for correction of light quantity without performing confirmation operation of a detection value (offset value) by each sensor when a drive circuit applying a drive signal to light emitting elements is turned off each time light quantity is corrected, in a configuration having the plurality of sensors detecting light from the light emitting elements. <P>SOLUTION: This light quantity correction method for an exposure head includes: a process of confirming detection values by first and second detection parts detecting light of first and second light emitting elements while a first drive circuit of the first light emitting element and a second drive circuit of the second light emitting element are turned off and storing the detection values in a storage part; a process of confirming the detection value by the first detection part while the first drive circuit and the second drive circuit are turned off; and a process of correcting the light quantity of the first light emitting element based on the detection value by the first detection part confirmed in the process and correcting the light quantity of the second light emitting element based on the detection value by the first detection part confirmed in the process and the detection values by the first detection part and the second detection part which are stored in the storage part. <P>COPYRIGHT: (C)2012,JPO&INPIT |
