Objective driving device for an optical disk apparatus

Objective lens actuator having movements restricting control mea

Objective lens drive device

Objective lens drive device with tracking error correction with

Objective lens driving device for tracking and focus corrections

Objective lens driving device with multipole magnet

Objective lens mount and drive for optical disc player

Objective lens-driving unit

Off-track bit shift compensation apparatus

Optical apparatus used for optical disk recording and...

Optical card reading and writing method with redundant directory

Optical card reproducing apparatus provided with a function of g

Optical characteristic measuring apparatus for an optical record

Optical data reading apparatus having means for detecting data d

Optical data recording method, and data recording medium

Optical data recording method, and data recording medium

Optical data reproducing devices having improved trick play capa

Optical device for controlling a light beam

Optical device for optically recording and reproducing informati

Optical disc and contamination detection system in an apparatus