| 摘要 |
PURPOSE:To record, reproduce and delete the information with one device by providing a displaying part to display the characteristic of the information forming layer of a information memory medium and a reading part to read the characteristic displayed at the displaying part. CONSTITUTION:When a cassette 2 is inserted into a main body 1 of the optical disk device, a bar code 6 of a displaying part 7 of the side surface part is optically read by a detecting device 8, the reading information, for example, the reflecting ratio, the sensitivity, the polarity of the reproduced signal, other physical constant, etc., are fed back to a control circuit 9, the characteristic is discriminated, and in accordance with the characteristic, the action of a recording head 5 is controlled. Thus, the recording head 5 is operated in accordance with the characteristic of an information forming layer 4 of optical disk medium 3, the information can be read, recorded and deleted to the optical disk media 3 with one device. |
