Abstract: A solid-state refrigeration apparatus includes a solid cooling structure, first and second heat exchangers, a heating medium circuit, a reciprocating conveying mechanism, and a thermal storage section. The solid cooling portion includes a solid refrigerant substance, an internal channel where the solid refrigerant substance is disposed, and an induction section configured to cause the solid refrigerant substance to produce a caloric effect. The heating medium circuit is connected to the first and second heat exchangers, and the internal channel. The heating medium heated by the solid cooling portion dissipates heat in the first heat exchanger and the heating medium cooled by the solid cooling portion absorbs heat in the second heat exchanger a heat application operation. Frost on the second heat exchanger is melted using the heat stored in the thermal storage section in a defrosting operation. The thermal storage section stores heat in the heat application operation.

Abstract: An objective lens driver includes: a lens holder, for holding an objective lens; a first focusing coil, for moving one end of the lens holder in the focusing direction; a second focusing coil, for moving the other end of the lens holder in the focusing direction; a tracking coil assembly, for moving the lens holder in the tracking direction; and flexible members, which includes a first flexible member pair, for feeding a current to the first focusing foil, a second flexible member pair, for feeding a current to the second focusing coil, and a third flexible member pair, for feeding a current to the tracking coil assembly, wherein the lens holder is flexibly supported at a driver main body by the flexible members, and wherein the flexible members are arranged in a plurality of columns on both ends of the lens holder.