| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical pickup device that complies with a plurality of disk standards and is capable of stably monitoring the output of a light source, and to provide an objective lens system used therefor. <P>SOLUTION: The optical pickup device 50 includes: a light source 1 for emitting a light of a first wavelength of a red band and light of a second wavelength of a red band; a light source 10 for emitting a light of a blue band for BD; a collimator lens 4; mirrors 5 and 7 for transmitting a part of a luminous flux emitted from the collimator lens 4 and bending an optical path of the other part of the luminous flux; objective lenses 6 and 8 for condensing the luminous flux bent by the mirrors 5 and 7, on the recording layer of an optical disk; and a photodetector 15 for detecting the intensity of the luminous flux that is transmitted through the mirrors 5 and 7. The collimator lens 4 adjusts the parallelism of the rays of the light emitted from the light sources 1 and 10 and emits the light of the first wavelength as a condensed light, and the light of the second wavelength as diverging light. <P>COPYRIGHT: (C)2010,JPO&INPIT |
