| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To suppress a change in an amount of light caused by a change of an ambient temperature, at low cost. <P>SOLUTION: In exposure devices 2a to 2d, a detection circuit 32 detects a pulse in an output waveform of a PD sensor 24 in which light is scanned on the PD sensor 24 and thereby the pulse is formed, and a controller 33 controls the amount of light of a laser diode 21 in a driver circuit 31 on the basis of a duration of the pulse. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
