Inventor
MUSHA TOHRU
JP11 patents
Patents
11 patentsUS4644516AFeb 17, 1987
Optical head
OLYMPUS OPTICAL CO50 citations95
US4425636AJan 10, 1984
Method and apparatus for reproducing optically an information recorded on a record medium along tracks
OLYMPUS OPTICAL CO39 citations92
US4423495ADec 27, 1983
Method and apparatus for recording optically an information signal on a record medium along tracks
OLYMPUS OPTICAL CO35 citations92
US4422168ADec 20, 1983
Method and apparatus for detecting a focussing condition of an objective lens
OLYMPUS OPTICAL CO31 citations92
US4455085AJun 19, 1984
Method and apparatus for detecting a focussing condition of an objective lens
OLYMPUS OPTICAL CO21 citations82
US4715024ADec 22, 1987
Optical head with provision for tracking and focussing control
OLYMPUS OPTICAL CO8 citations73
US4525825AJun 25, 1985
Method and apparatus for detecting focussing and tracking error signals
OLYMPUS OPTICAL CO14 citations73
US4509830AApr 9, 1985
Light beam separation method
OLYMPUS OPTICAL CO7 citations73
US4507764AMar 26, 1985
Objective lens drive device with tracking error correction with flux of opposite direction
OLYMPUS OPTICAL CO12 citations73
US4505584AMar 19, 1985
Method and apparatus for detecting focussing error signal of objective lens
OLYMPUS OPTICAL CO18 citations73
US4453239AJun 5, 1984
Method and apparatus for controlling the focusing and tracking of a light beam using a main and secondary light beam in association with multiple detectors
OLYMPUS OPTICAL CO20 citations73