Shigeaki Koike

Deterioration estimating method for a light emitting device and a light emission driving apparatus using the method

M-O disk recording apparatus with light amount control based on multiple test performed on a test region at multiple disk rotational velocities

Optical pickup driving apparatus

Data recording and reproducing apparatus having a data transferring device for selectively transferring data between multiple data recording and reproducing devices

Optical disc camcorder

Data recording and reproducing apparatus

Vibration proof mechanism and portable information recording and reproducing device

Photomagnetic recording device and photomagnetic reproducing device

Apparatus for detecting deviations from a mutually perpendicular condition between a disc and a light beam

Information recording or information recording/reproducing device