Patent ID: 6172780
Filing Date: 2001-01-09
Classification: B41J,G02B

Abstract:
A laser scanning apparatus comprising:a housing;an optical source installed on a main frame of said housing;a scan disk which is rotatably installed on said main frame of said housing and has diffraction patterns formed thereon for deflecting a beam emitted from said optical source in a predetermined direction to achieve a normal light path; andmeans for shielding an abnormal beam that is emitted from said optical source and diffracted or reflected off the normal light path by said scan disk, the light shielding means being installed within the laser scanning apparatus housing, and including an optical absorbing member disposed within the interior of the laser scanning apparatus housing for absorbing and blocking the abnormal beam,said light shielding means further including a reflecting mirror for changing the path of said abnormal beam emitted from said scan disk toward said optical absorbing member.