| 摘要 |
An optical pickup device for recording, reproducing or erasing an information, comprises a sole semiconductor laser beam source for emitting a luminous flux, a polarizer for receiving the luminous flux emitted from the sole semiconductor laser beam source and dividing the received luminous flux into a plurality of luminous fluxes, and a sole object lens for receiving a plurality of the divided luminous fluxes and converging each of a plurality of the received luminous fluxes on small spots on an optical information recording medium, respectively.
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