| 摘要 |
An optical pickup system reproduces an information signal stored on an optical disk including a recording surface. The optical pickup system comprises an objective lens for focusing a light beam, having a P and an S polarizing components, on the recording surface, a first prism provided with an inclined and a side surfaces and a second prism provided with a side surface, wherein the second prism includes a light source for generating the light beam, a first detector and a first and a second +E,fra 1/4+EE lambda plates, and a first prism includes a second detector and a polarizing film for transmitting only the P-polarizing component of the light beam to the recording surface. In the optical system, the first detector attached at the side surface of the second prism facing the second +E,fra 1/4+EE lambda plate from outside, for receiving a part of the light beam impinging thereon and reflecting the remaining part of the light beam to the direction of the second +E,fra 1/4+EE lambda plate, and the second detector fixed at the side surface opposite the first detector with respect to the center of the inclined surface of the first prism, for receiving the remaining part of the light beam.
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