| 摘要 |
PURPOSE:To avoid the trouble to extract an optical disk medium out of a main body and to reset at any time in reading/writing the side A of the optical disk medium from the side B or vice versa by providing a reflecting mirror device. CONSTITUTION:A reflecting mirror device 4 is a device to light a laser beam 5 radiated from a head 1 onto an optical disk medium 2 perpendicularly. The two reflecting mirror device 4 in total are provided to the upper and lower faces of the optical disk medium 2 and movable freely from the outermost circumference to the innermost circumference of an optical disk medium recording face to read/write the data at random. In accessing the side A 2a of the optical disk medium 2, the head 1 is descended to be opposed to the lower reflecting mirror device 4 and in accessing the side B 2b, the head is moved upward to be opposed to the upward reflecting mirror device 4. Thus, it is not required to extract the optical disk medium from the main body and to reset it. |
