Morgan, Lewis & Bockius LLP
Optical pickup device
 An optical pickup device with a compact actuator has a holder that includes an objective lens and a hole formed therein. The holder is supported flexibly by a base. A focusing coil and a tracking coil are attached to at least a portion of the hole. A magnetic circuit that imparts magnetic flux to the focusing and the tracking coils is placed in the hole. The focusing and the tracking coils have magnetically fluxed and unfluxed portions. The magnetically unfluxed portions are positioned on the opposite side of the lens as that of the fluxed portions. 
Pioneer Electronic Corporation Tohoku Pioneer Electronic Corporation
G G
G11B G11B
inventional inventional
Yutaka Yoshiharu Hiroaki Ryuji
Saito Sato Ito Izumino