Hiroto Kitai

Method of and apparatus for seeking a desired track by counting track crossing signals which are detected within a predetermined time interval

Optical information recording and/or reproducing apparatus and method with vibration wave driving device or vibration driven motor device

Apparatus and system for at least recording information on or reproducing information from a card-shaped recording medium

Tracking device to effect tracking pull-in in an optical recording and reproducing apparatus by vibrating a light spot

Optical information processing apparatus provided with means for holding an optical system in a predetermined position when abnormality occurs to tracking or focusing control

Device for magnetically guiding movement of a moving body such as an optical head

Optical information reproduction apparatus and optical information reproduction method

Information processing apparatus with means for outputting signal representing relative position between head and medium

Optical information recording/reproduction apparatus and method using an ultrasonic wave motor to drive one of an optical head and a recording medium

Optical card processing apparatus with means for determining a relative position between head and card