| 摘要 |
An optical pickup system reads an information signal from stored on a recording surface of an optical disk. The optical pickup system includes a light source for generating a light beam including a P and an S polarization component with a wavelength lambda 1, a +E,fra 1/4+EE lambda plate for changing the polarization component of the light beam transmitted therethrough, an optical detector for detecting the information signal off the optical disk, and a beam splitter, provided with a first and a second surface, the first surface being capable of reflecting one of the polarization components to the optical disk through the +E,fra 1/4+EE lambda plate and transmitting the light beam reflected from the optical disk changed its polarization component by passing through the +E,fra 1/4+EE lambda plate to the second surface being capable of reflecting the light beam impinging thereon to the detecting means, thereby allowing the optical pickup system to read the information signals off the recording surface.
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