Abstract: An oscillation control device includes a base body, a movable object, an inertial mass and a driving mechanism. The movable object is supported to the base body. The inertial mass is capable of applying inertial force to the movable object. The driving mechanism mechanically connects the base body and the inertial mass with each other so that the driving mechanism can drive the inertial mass according to a relative movement between the movable object and the base body so that the relative movement therebetween can be suppressed due to the inertial force.

Abstract: A mounting device including a base, a movable body, a supporting mechanism disposed therebetween, and a controller for controlling the mechanism. The mechanism applies supporting force to the movable body from a plurality of positions of the base to support the movable body on the base and determines a center of oscillation of the movable body with respect to the center of oscillation which is higher than the center of gravity of the movable body. The controller controls the mechanism to shift the center of oscillation, by changing directions support forces, at least in a horizontal direction according to a change of the center of the oscillation so that a change in an inclination of the mounting device due to a load transfer to the movable body can be decreased.

Abstract: In a disclosed optical scanner, an optical axis adjustment is made by moving a circuit board on which a light emitting device open-type semiconductor laser is mounted along a base face of an optical box. For a high-quality optical scanning, the circuit board is attached to the base face of the optical box. The invention provides a light emitting element open-type in which a semiconductor laser is disposed in an optical box which is almost hermetically sealed with a cover to avoid adhesion of dusts, electrostatic destroy, and deterioration in picture quality.

Abstract: In a disclosed optical scanner, an optical axis adjustment is made by moving a circuit board on which a light emitting device open-type semiconductor laser is mounted along a base face of an optical box. For a high-quality optical scanning, the circuit board is attached to the base face of the optical box. The invention provides a light emitting element open-type in which a semiconductor laser is disposed in an optical box which is almost hermetically sealed with a cover to avoid adhesion of dusts, electrostatic destroy, and deterioration in picture quality.