Patent ID: 8407729
Filing Date: 2013-03-26
Classification: G11B

Abstract:
1. An optical disk record and playback apparatus which can record or playback a plurality of kinds of optical disk media having different operation distances between a pickup lens and a disk surface at the time of focusing, and which can handle both an optical disk medium placed in a disk cartridge and the optical disk medium having no disk cartridge, wherein the optical disk record and playback apparatus includes disk loading means which loads the optical disk medium onto a disk loading portion, disk rotating means which rotates the loaded optical disk medium, a pickup which optically reads information which is recorded in the optical disk medium, pickup moving means which moves the pickup in a radial direction of the optical disk medium, disk discriminating means which discriminates kinds of optical disk media, disk cartridge detecting means which detects whether or not the optical disk medium loaded into the apparatus is placed in the disk cartridge, and restricting means which restricts a moving range of the pickup when the disk discriminating means discriminates that the optical disk medium has a short operation distance and the disk cartridge detecting means detects that the optical disk medium is placed in the disk cartridge.