A stereoscopic imaging device, wherein the aperture controller performs a second aperture control in which the larger the amount of shake detected by the shake detector becomes, the further the amount of opening of the aperture unit increases than the amount of opening required for the first aperture control. Thus the motor is driven to adjust the mirror surface angle of the mirror body. A valve assembly can be disposed within the valve housing and adapted to control a rate of fluid flowing through the valve housing. In another embodiment, the present invention allows for packing maximum energy density per layer. The information delivery terminal automatically establishes a Bluetooth link with only the portable terminal according to the link information received from the server to provide information to the portable terminal. A management device includes a file linking unit linking a plurality of management-information database structure definition files.