Patent ID: 6304536
Filing Date: 2001-10-16
Classification: G11B

Abstract:
An optical disk apparatus for reproducing information recorded on an information face of a disk set in said apparatus by irradiating the information face of the disk with a light beam, said apparatus comprising:a focal point moving means for moving a focal point of the light beam for reproducing the information in a direction perpendicular to the information face;a reflected light detecting means for detecting a reflected light from the disk; anda discriminating means for discriminating the disk set in said apparatus as a disk employing an organic coloring material for a recording film when a signal output from said reflected light detecting means is lower than a prescribed level when said focal point moving means is driven so that the focal point passes through the information face, wherein the light beam, when the discrimination of the disk is performed, is provided with an intensity lower than an intensity of the light beam for reproducing information.