Patent ID: 6377381
Filing Date: 2002-04-23
Classification: G02B

Abstract:
A light beam deflection scanner comprising:a light beam generating portion having a plural number of laser beam sources so as to emit a plurality of light beams from the laser beam sources; a deflection scanning portion for deflecting and scanning the plurality of light beams from the light beam generating portion; a light beam detecting portion detecting the plurality of light beams deflected and scanned by the deflection scanning portion so as to output an electric signal in accordance with the amount of light detected; and a light amount correcting portion correcting the drive voltage of each laser beam source so that the amount of light of each light beam will coincide with the other, the light amount connecting portion including, apparatus for emitting a light beam with a predetermined voltage applied to one laser beam source, apparatus for measuring a recovery time from when the light beam detecting portion detects the light beam until the output voltage from the light beam detecting portion returns to a predetermined level of voltage, and apparatus for correcting the light beam amount based on the recovery time.