| 摘要 |
In an optical disk device of this invention which deals with various types of optical disks (1), the amounts of light are set for the various types of optical disks (1) by emitting laser light from a semiconductor laser oscillator (19) while sequentially increasing the light amount thereof for the optical disks (1) in an order from the optical disk (1) of the smallest set light amount. That is, first, whether or not an optical disk (1) of CD, CD-ROM or DVD-ROM can be suitably used is determined based on the amount of reflection light from the optical disk (1) obtained by causing the semiconductor laser oscillator (19) to emit laser light in the smallest light amount setting state, and if it is not determined that the optical disk (1) can be suitably used, the light amount is raised to a level higher than the lowest light amount set level by one level. In this state, whether or not an optical disk (1) of CD-R or DVD-R can be suitably used is determined based on the amount of reflection light from the optical disk (1) obtained by causing the semiconductor laser oscillator (19) to emit laser light, and if it is not determined that the optical disk (1) can be suitably used, the light amount is raised to a level higher than the smallest light amount set level by two levels, and in this state, whether or not an optical disk (1) of DVD-RAM can be suitably used is determined based on the amount of reflection light from the optical disk (1) obtained by causing the semiconductor laser oscillator (19) to emit laser light. <IMAGE> |
