Takaaki Ashinuma

Optical information recording/reproduction apparatus including means for detecting the type of recording medium

Information recording/reproducing apparatus including a plurality of recording or reproducing rates

Test recording method and optical information recording/reproducing apparatus for determining an optimum power of the light output from a light source in erasing pieces of information recorded on a land and groove of a recording medium

Information recording/reproducing apparatus including setting optimum recording condition or reproducing condition

Method and apparatus for verifying recording data and for determining recording error using a detected light amount

Write test method for use in recording process for recording information by modulating the power of a laser light thereby forming a high-temperature state and a low-temperature state on a recording medium

Method for setting optimal reproduction power level in domain wall displacement magneto-optical recording device

Signal reproducing apparatus for reproducing information by moving magnetic walls

Write test method for pit edge recording method and optical information recording/reproducing apparatus utilizing the same test method

APPAREIL DE STOCKAGE OPTIQUE D'INFORMATIONS