Optical pickup system incorporated therein a polarizing film and

Details Optical pickup system incorporated therein a polarizing film and Optical pickup system incorporated therein a polarizing film and

1997-07-22

2000-08-01

Young, W. R.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369 4423, 369110, G11B 700

Patent

active

060976896

ABSTRACT:
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 1/4 .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 1/4 .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 1/4 .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.

REFERENCES:
patent: 5383173 (1995-01-01), Kim et al.
patent: 5396061 (1995-03-01), Taniguchi et al.
patent: 5511060 (1996-04-01), Jau-Jiu et al.
patent: 5555538 (1996-09-01), Yanagawa et al.
patent: 5561655 (1996-10-01), Gage et al.

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