Optical information recording and reproducing apparatus having f

Details Optical information recording and reproducing apparatus having f Optical information recording and reproducing apparatus having f

1990-06-11

1994-10-25

Chin, Tommy P.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369 48, 369 54, 369 4432, G11B 700

Patent

active

053595890

ABSTRACT:
An apparatus for recording and reproducing information on and from a rotary information recording disc by using a light beam includes an intensity detector for detecting a recording light intensity which is the intensity of the light beam at the time of recording information on the basis of a reproduction signal obtained by projecting the light beam onto the rotary information recording disc at the time of reproducing information, a comparator for comparing the recording light intensity with a predetermined optimum value and giving a comparison result, and an adjuster for adjusting an intensity of the light beam at the time of recording information, so that the intensity of the light beam at the time of recording information becomes the optimum value.

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patent: 5070495 (1991-12-01), Bletscher, Jr. et al.

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