Method for correcting the beam intensity in an image recording apparatus using a multi-channel light modulator

摘要

In an image recording apparatus 1 which records an image on a recording medium 9 by moving an optical head 10 while rotating the recording medium 9 held by a holding drum 7 , a photodetector 2 having a plurality of photodetector elements 21 is provided in a range of movement of the optical head 10 . In correcting beam intensity, the optical head 10 is positioned so precisely that the photodetector 2 can receive the signal light beams. This constitution makes it possible to detect signal light beams from the light modulator with high S/N ratio as compared with a conventional case where one photodetector element sequentially receives the signal light beams, and therefore possible to correct the beam intensities with high accuracy.