Optical pickup

Details Optical pickup Optical pickup

1995-03-03

1996-09-10

Hindi, Nabil

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369112, G11B 700

Patent

active

055555381

ABSTRACT:
An optical pickup includes: a laser diode for emitting p-polarized light, the laser diode having unit for controlling output power of the p-polarized light by detecting power of the emitted light in front thereof; a photodetector for receiving a laser light and outputting a signal corresponding to quantity of the laser light received; a polarization prism for transmitting and guiding the emitted light to an optical disc on which information is recorded by applying heat thereon, and for reflecting and guiding at least a portion of the light reflected by the optical disc to the photodetector. The optical pickup substantially satisfies the following conditions:

REFERENCES:
patent: 5115420 (1992-05-01), Finkelstein et al.

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