Abstract: There is provided an organic electrolytic cell equipped with a positive electrode, a negative electrode and a solution of a lithium salt in an aprotic organic solvent as an electrolytic solution, wherein(1) the positive electrode contains a metallic oxide,(2) the negative electrode is an infusible, insoluble substrate (PAS) having a polyacene type skeletal structure and a hydrogen/carbon atomic ratio of 0.5 to 0.05, the substrate being a heat-treated product of an aromatic condensation polymer, and(3) the total amount of lithium contained in the cell is 500 mAh/g or more, and the amount of lithium originating in the negative electrode is 100 mAh/g or more, based on the infusible, insoluble substrate (PAS) having a polyacene type skeletal structure as the negative electrode,the organic electrolytic cell being a secondary cell having a high capacity and high voltage.

Abstract: An objective lens drive device includes an objective lens holder, a fixing member, drive coils mounted on one of the objective lens holder and the fixing member; magnets mounted on the other, the magnets positioned in a face-to-face relationship with the drive coils and supplied with an electric current so as to drive the lens holder in both a focusing and a tracking direction, the magnets are magnetized with polarization at least in the focusing direction; and magnetic pieces placed in the magnetic circuits of the magnets relating to a focusing direction, wherein a two-dimensional restoring force is generated in the focusing and tracking directions by the magnetic attraction acting on the magnetic pieces so that the objective lens is held at the neutral point, at least one end portion of the magnetic pieces in the polarizing direction is wider than the middle portion.