Abstract: Provided is a light source system capable of easily performing optical axis adjustment between units. The light source system includes a second unit that detects an optical axis and performs at least one of adjustment or monitoring of a laser beam, and a third unit that performs optical axis adjustment. The third unit is configured to be able to be placed on the light incident side of the second unit, and a control device controls the optical axis adjustment of the third unit on the basis of the detection result of the optical axis.

Abstract: An actuator includes a stack including: an elastomer layer; and an elastic electrode disposed on each surface of the elastomer layer, in which the stack is subjected to a pre-strain of 50% or more at least in one direction. The stack may have a round tubular shape with the elastic electrodes disposed on opposite surfaces of the elastomer layer in a radial direction of the stack.

Abstract: An actuator includes a laminate including an elastomer layer and an electrode, in which the laminate has a spiral or concentric shape, pre-distortion is applied to at least one member out of the elastomer layer and the electrode, and area distortion of the at least one member is 10% or larger.

Abstract: An actuator includes a laminate including an elastomer layer and an electrode, in which the laminate has a spiral or concentric shape, pre-distortion is applied to at least one member out of the elastomer layer and the electrode, and area distortion of the at least one member is 10% or larger.

Abstract: Provided is an actuator including: a stack including: an elastomer layer; and an elastic electrode disposed on each surface of the elastomer layer, in which the stack is subjected to a pre-strain of 50% or more at least in one direction.

Abstract: In a synthetic roller-bearing cage, axially separated annular bodies are connected by columnar portions arranged in the circumferential direction in order to define roller accommodating pockets. A radially outer surface of the columnar portion forms a portion of a cylindrical surface whose radius is smaller than that of the outer circumferential surfaces of the annular bodies, thus forming a lubrication-oil flow surface. A radially inner surface of the columnar portion, together with inner circumferential surfaces of the annular bodies, forms a portion of a cylindrical surface whose diameter is at least 30% that of the roller greater than that of a shaft on which the roller bearing is mounted. Grooved portions are formed in the circumferentially opposite side surfaces of the columnar portion at axially opposite end regions adjacent to the respective annular bodies.