The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 07, 1988
Filed:
Apr. 28, 1986
Toyoaki Takeuchi, Ina, JP;
Yoshiaki Ikeda, Hachioji, JP;
Olympus Optical Company Limited, Tokyo, JP;
Abstract
An apparatus for recording and reproducing optical information is disclosed. The apparatus comprises a light source, an information recording medium for recording, reproducing, and erasing an information optically with a light beam emanated from the light source, an light output detecting means arranged to receive a part of a light output from the light source for monitoring the light output thereof, at least one reflected light detecting means for detecting light reflected from the surface of the recording medium, a light output controlling means for controlling the light output of the light source by adjusting drive current of the light source in accordance with an output signal from the light output detecting means, a light beam controlling means for controlling focusing and tracking for the recording medium in accordance with an output signal from the reflected light detecting means, and a controlling amount adjusting means for adjusting controlling amount of the light output controlling means and the light beam controlling means in accordance with a positional information in radial direction of the recording medium for the light beam.