Optical pickup device with a plurality of laser couplers

Details Optical pickup device with a plurality of laser couplers Optical pickup device with a plurality of laser couplers

2006-09-26

2006-09-26

Hindi, Nabil (Department: 2627)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

C369S044370

Reexamination Certificate

active

07113471

ABSTRACT:
An optical pickup device with the capability to read data from and write data to different kinds of optical discs in different formats and a composite optical device used in the optical pickup device. An optical pickup device is made by combining two laser couplers LC1and LC2that are designed for optimum read/write specifications for optical discs which are different in format from each other. In one embodiment, two laser couplers LC1and LC2are incorporated on a common photodiode IC to form a single laser coupler, and the laser coupler is used in an optical pickup device.

REFERENCES:
patent: 5696749 (1997-12-01), Brazas et al.
patent: 6256283 (2001-07-01), Fukakusa et al.

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