Optical pickup system

Details Optical pickup system Optical pickup system

1994-03-25

1995-06-20

Dzierzynski, Paul M.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369 4423, G11B 700

Patent

active

054266300

ABSTRACT:
An optical pickup system for generating information signals recorded on a recording medium includes a semiconductor laser generating source for generating and emitting a laser beam, an object lens for condensing the generated laser beam for an optical disc and receiving the laser beam reflected by an optical disc, a beam separator for changing a forwarding direction of the laser beam reflected by an object lens reflected by the optical disc, a prism for directing a portion of the beam to a pair of photo detector units provided on the prism and for forwarding the remainder of said laser beam in the same direction it was travelling when first incident on the prism, a condensing lens for condensing the laser beam reflected by the prism, and a focusing error compensating means for compensating two signals to be zero by an actuator.

REFERENCES:
patent: 5225924 (1993-07-01), Ogawa et al.
patent: 5272685 (1993-12-01), Ando

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