| 摘要 |
A pickup device and an information recording/reproducing apparatus for reproducing information in which crosstalks have been suppressed without causing an erasure or the like of the information which has already been recorded on an information recording medium. The apparatus has a light source 1 for emitting first and second lights whose polarizing directions cross perpendicularly. The first and second lights are transmitted through a grating for merely transmitting the first light and diffracting the second light at a predetermined diffraction efficiency and those lights are converged by an objective lens, thereby forming a laser beam and irradiating it onto an optical disc. At the time of the recording of information, the second light is set to a light-off mode or a low power state and the recording of information is performed by the laser beam caused by the first light. At the time of the reproduction of information, both of the first and second lights are emitted, the reproduction of information is performed by the laser beam caused by the first light, and the laser beam caused on the basis of the diffraction light caused due to the diffraction of the second light is irradiated to the adjacent tracks. Consequently, at the time of the reproduction of information the laser beam of the low power is irradiated onto the adjacent tracks and the information to remove crosstalk components can be obtained without causing erasure or the like of the information.
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