Patent ID: 6075637
Filing Date: 2000-06-13
Classification: G02B

Abstract:
A laser beam scanning optical system comprising:a light source for emitting at least one laser beam;a condenser lens for forming at least one laser beam emitted from the light source into at least one converging laser beam;a deflector for deflecting each converging laser beam from the condenser lens; anda scanning lens system that includes a plurality of lenses made of optical materials having different dispersion that operatively corrects lateral chromatic aberration caused therein and that refracts each converging laser beam received from the deflector in such a way that the laser beam is condensed both in a main scanning direction and in a sub-scanning direction on a scanned surface,wherein the following condition is fulfilled:0<.beta.<3where, .beta. represents magnification of the scanning lens system in the main scanning direction within a region close to an optical axis.