| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical pickup device which can realize a read-out/write-in performance of high quality. <P>SOLUTION: The optical pickup device is provided with a first light source 1, a second light source 2, a beam splitter 6 provided with a wavelength selecting film 5, a front monitor PD7, a collimate lens 8, a rise mirror 9, a reflection mirror D10, a reflection mirror C11, and an objective lens. The wavelength selecting film 5 reflects the light beam from the first light source almost 100%, while the film transmits the light beam from the second light source almost 100%. In the laser beam from the first light source, unnecessary light which is not used for write-in for the optical disk and reproduction (read-out) of signals is reflected by the reflection mirror D10 and made incident on the front monitor PD7. In the laser beam from the second light source, the unnecessary light is reflected by the reflection mirror C11 arranged at the same position as a coupling lens 12 and made incident on the front monitor PD7. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
