Hirotake Ando

Optical information processing apparatus for correcting linearity of a photosensor output with respect to power of an emitted light beam

Information recording and/or reproducing method and apparatus in which a servo process of a light beam is interrupted between input/output control of data at predetermined periods

Optical information processing method and apparatus including measuring and correcting the offset of a tracking error signal from an output of a photodetector using a vibrating objective lens

Optical information processing apparatus including a correction circuit for correcting non-linearity of an output of a position detection circuit

Optical information recording and/or reproducing apparatus capable of selecting one of focusing error signals depending upon operating mode

Optical information processing apparatus in which the offset of a tracking error signal is corrected in accordance with a relationship stored in a memory, in response to a position detection output signal

Optical information reproducing apparatus having a servo control circuit

Magnetooptical disc apparatus having single micro-processor for controlling input/output processing of information by causing an interruption in the processing

OPTICAL INFORMATION PROCESSING APPARATUS WITH PEAK HOLD CIRCUIT FOR GAIN CONTROL SIGNAL

OPTICAL DEFLECTION APPARATUS, IMAGE FORMING APPARATUS, AND METHOD OF DRIVING OPTICAL DEFLECTION APPARATUS