Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Patent
1989-06-30
1991-08-20
Envall, Jr., Roy N.
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
369 58, 369116, 369120, G11B 7085
Patent
active
050420208
ABSTRACT:
An information recording and/or reproducing apparatus in which a beam emitted from a light source is applied to an optical recording medium to thereby record and/or reproduce information thereon has a light projecting device for projecting a medium-detecting-light flux onto the surface of the optical recording medium, a discriminating device for detecting the level of the reflected light or the transmitted light of the medium-detecting-light flux from the optical recording medium and discriminating between optical recording mediums different in characteristic by the detected level, and an intensity changing device for changing the intensity of the beam on the surface of the optical recording medium in accordance with the determination of the discriminating device.
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Canon Kabushiki Kaisha
Envall Jr. Roy N.
Young W. R.
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