Optical information recording and reproducing apparatus with amp

Details Optical information recording and reproducing apparatus with amp Optical information recording and reproducing apparatus with amp

1986-12-19

1989-08-08

Psitos, Aristotelis M.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369122, 250205, 372 38, G11B 700, H04B 900, G01J 132

Patent

active

048559881

ABSTRACT:
The hold mode period of a sample/hold circuit disposed in a control system for controlling a laser diode so as to keep constant luminous power contains the information signal write period, and a third drive circuit for making proper the low level of modulation current of the laser diode is disposed to maintain the low level of laser light in write operation at the proper value.

REFERENCES:
patent: 4509156 (1985-04-01), Ohara et al.
patent: 4516242 (1985-05-01), Yokota
patent: 4523089 (1985-06-01), Maeda et al.
patent: 4685097 (1987-08-01), van der Put
patent: 4689795 (1987-08-01), Yoshimoto et al.
patent: 4698797 (1987-10-01), Komatsu
patent: 4698817 (1987-10-01), Burley
patent: 4701609 (1987-10-01), Koishi et al.

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