Automatic disk discriminating method and apparatus in an optical disk system

摘要

An automatic disk discriminating method and an apparatus therefor are disclosed for use in an optical disk system. A triangular wave signal generator generates a triangular wave signal for searching for a focus point by moving a objective lens in relation to the optical disk. A window signal generator generates a window signal by comparing the triangular wave signal with a predetermined level. A disk discriminator discriminates the disk type of the optical disk by comparing the signal obtained when light from the objective lens is focused on a recording surface on the optical disk, with the window signal. Accordingly, the disk type of the optical disk is automatically discriminated during focus controlling using the distance between the disk recording surface and the objective lens of the optical pick-up.