Abstract: A variable magnification optical component and an ophthalmic apparatus having a simpler mechanism and requiring a small space are provided. The variable magnification optical component includes an optical path, and a power changer, disposed rotatably with respect to an optical axis of the optical path. The power changer is configured to be removably inserted into the optical path, in which the power changer includes: multiple lenses for varying power and a light beam passage hole configured not to interfere with the lenses. In a first configuration of the variable magnification optical component, the power changer is inclined at a predetermined angle, such that the lenses are retracted outside the optical path, and the optical path passes through the light beam passage hole. In a second configuration of the variable magnification optical component, the power changer is restored and the lenses are positioned on the optical path.

Abstract: A transport system include: a workpiece holder configured to hold a workpiece; a moving body facing the workpiece holder at least in a gravity direction and movable in a movement direction intersecting the gravity direction; a weight reducer configured to apply a static non-contact force to the workpiece holder to reduce a weight of the workpiece holder; a force generator disposed on the moving body to face the workpiece holder in the gravity direction, the force generator configured to apply a controllable non-contact force to the workpiece holder so as to follow a movement of the moving body while levitating the workpiece holder having the reduced weight; and circuitry configured to control the controllable non-contact force generated by the force generator to control a relative position of the workpiece holder with respect to the moving body.

Abstract: There is provided a traffic sign apparatus that can improve the luminance of a sign surface which emits light by ultraviolet irradiation, and the uniformity ratio of illuminance, so as to enhance the visibility thereof in the nighttime. The traffic sign apparatus 10 includes a sign body 11 having the sign surface 14 which emits light by ultraviolet irradiation, and an irradiation device 12 for irradiating ultraviolet rays onto the sign surface 14. Assuming that the maximum incident angle of the ultraviolet rays be ?1, the ultraviolet rays being irradiated from the ultraviolet emission lamps 26 of the irradiation unit 12 onto the objective sign surfaces W1 and W2 on the sign surface 14 which is the irradiation object of the ultraviolet emission lamps 26; and that the minimum incident angle be ?2, the angle ?1 is set to more than 30° and less than 70°; and the angle ? 2 is set to more than 5° and less than 30°.