Patent ID: 6097689
Filing Date: 2000-08-01
Classification: G11B

Abstract:
An optical pickup system for reproducing an information signal stored on an optical disk including a recording surface, the optical pickup system comprising:means for generating a light beam including a P and an S polarization components;means for focusing the light beam on the recording surface of the optical disk;means for transmitting one of the polarization components of the light beam to the recording surface of the optical disk, wherein the center point of the transmitting means is placed at an optical axis formed by a central point of the generating means and a focal point of the focusing means;a first optical device for changing the polarization component of the light beam reflected from the recording surface of the optical disk, thereby the changed light beam being reflected by the transmitting means;a second optical device for changing the polarization component of the changed reflected light beam to thereby cause the changed reflected light beam pass through the transmitting means; andmeans for detecting the light beam reflected from the recording surface of the optical disk, wherein the detecting means is provided with a first and a second optical detectors, each being placed opposite from the other with respect to the center point of the transmitting means.