Patent ID: 6597486
Filing Date: 2003-07-22
Classification: G02B

Abstract:
An optical system, comprising:a semiconductor laser; a case accommodating said semiconductor laser and having a window to pass through laser light emitted from said semiconductor laser; a collimator lens for turning said laser light passed through said window into a parallel luminous flux; an attenuating means provided between said window and said collimator lens for attenuating a portion of said laser light passed through said window; a deflector for deflecting said laser light in a parallel luminous flux toward a main scanning direction; a light collector for collecting the laser light deflected onto a scanning surface; and a light shield member provided between said semiconductor laser and said attenuating means and having a pinhole to allow said laser light passed through said window to pass through; wherein said laser light reflected upon an inner surface of said pinhole and then directly delivered to said collimator lens is all given to said deflector.