Patent ID: 6078555
Filing Date: 2000-06-20
Classification: G11B

Abstract:
An optical head assembly for use in an optical disk driver using different wavelengths from each other for at least two types of optical disks, the optical head assembly comprising:a first optical unit mounted fixedly in the optical head assembly; anda second optical unit mounted movably with respect to an optical disk loaded in the disk driver,wherein said first optical unit emits a first light beam having a first of the different wavelengths to said second optical unit and detects information from the first light beam reflected from the loaded optical disk and received from said second optical unit, if the loaded optical disk is a first of the at least two types of optical disks, andsaid second optical unit focuses the first light beam incident from said first optical unit on an information recording surface of the loaded optical disk and transmits the first light beam reflected from the loaded optical disk to said first optical unit, if the loaded optical disk is the first type of optical disk, generates a second light beam, focuses the second light beam on the information recording surface of the loaded optical disk and detects information from the second light beam reflected from the loaded optical disk, if the loaded optical disk is a second type of the at least two types of optical disks.