In a device for transmitting optical signals between a first sub-assembly having a first lens, a first bearing ring, and a first clamping sleeve, which has a conical surface, and a second structural unit having a second lens, a second bearing ring, a second body, a second clamping sleeve, which has a conical surface, and a clamping device, the first bearing ring and the second bearing ring are associated with a bearing by which the first sub-assembly and the second sub-assembly are connected to each other rotatably about an axis. Arranged in a centered manner in relation to the axis are: the first lens on the first bearing ring with the aid of the first clamping sleeve through a first conical connection, the second lens on the second body with the aid of the second clamping sleeve through a second conical connection, and the second body on the second bearing ring with the aid of a clamping device by a third conical connection.

The disclosure relates to a bearing assembly for a lithography system, having an optical element, a base, and a bearing device that moveably supports the optical element relative to the base. The bearing device has at least one torsion decoupling element that reduces a transmission of torsional moments between the optical element and the base. The torsion decoupling element has at least two leaf springs which have respective opposing narrow sides and which bring about torsional moments about an axis perpendicular to the narrow sides. The at least two leaf springs are also positioned at an angle to one another and are coupled to one another in such a way that a force flow through the torsion decoupling element simultaneously flows through the at least two leaf springs.

A bearing, for supporting a rotation shaft of a rotatable member, capable of being supported by a supporting portion provided with an engaging hole engageable with the bearing includes positioning projections having contact surfaces and bearing projections having sliding surfaces on which an outer peripheral surface of the rotation shaft slides. The positioning projections project from different positions so that between adjacent positioning projections, an outer peripheral surface of the bearing and the inner wall surface of the engaging hole form a gap therebetween. The bearing projections project from different positions so that between adjacent bearing projections, an inner peripheral surface of the bearing and an outer peripheral surface of the rotation shaft form a gap therebetween. With respect to a circumferential direction of the rotation shaft, the positioning projections and the bearing projections are provided at positions different from each other.

In an infrared spectrophotometer, a plurality of rolling elements are provided between a movable portion and the holding portion. While no external force is applied from a spring, a play space is generated between the movable portion, the holding portion, and each rolling element. In the infrared spectrophotometer, when the movable mirror and the movable portion are slid, an external force directed downward is applied to the movable portion by the spring, thereby preventing each rolling element from moving between the movable portion and the holding portion. Accordingly, when the movable mirror and the movable portion are slid, it is possible to suppress rattling of the movable portion and the holding portion while leaving a fine gap between the movable portion, the holding portion, and each rolling element. This makes it possible to easily control the moving speeds of the movable mirror and the movable portion and to suppress rattling of the movable mirror and the movable portion.

A joint for coupling a side arm to a frame of a pair of glasses. The joint includes a post, a plurality of prongs, and optionally a nut. The post is configured to be secured to one of the side arm or the frame and the plurality of prongs are configured to be secured to the other of the side arm or the frame. The post includes a shaft and an enlarged head at a distal end of the shaft. The plurality of prongs define a socket configured to receive at least a portion of the enlarged head of the post and apply a compressive force against the enlarged head of the post. The nut may be configured to generate a compressive force against the plurality of prongs. The compressive force may be adjusted by threading the nut along the length of the prongs. The nut may threadably engage a base that the prongs extend from and/or the prongs.

A flexure bearing includes an inner race, an outer race, and a plurality of substantially planar radially extending blades coupled between the inner and outer race. The blades have a thickness that is thinner than a thickness of the inner and outer races. The inner race, outer race, and blades have substantially the same height. At least one heating element is coupled to the inner race and/or the outer race. The heating element is configured to apply heat to the race that it is coupled to in order to tune the flexure bearing.

A ball joint holder with limiting element includes a lower base, an upper base covered to the lower base, a ball shaft and a limiting element. The ball shaft has a rotation rod, and a ball body located around a lower end of the rotation rod. A lower end of the rotation rod protrudes outward to form a limiting block. Two opposite ends of the limiting element are pivotally connected with the lower base and the upper base. The limiting element opens a limiting groove. One of inner surfaces of a front wall and a rear wall of the limiting groove is defined as a limiting surface. The lower end of the rotation rod and the limiting block are received in the limiting groove. The limiting block is capable of abutting against the limiting surface.

A preload guide system guides, in a horizontal plane, movement of a rotation structure having journals rotating around a rotation axis having a horizontal rotation shaft. At right-side surfaces of the journals, guide bearing components press predetermined positions on the same side with respect to an axial-direction reference plane and rotatably support the journals. At left-side surfaces of the journals, guide bearing components press positions corresponding to the guide bearing components at the right side surfaces, and rotatably support the journals. The support systems adjust displacement amounts of the guide bearing components such that a sum of the displacement amounts becomes zero.

The subject of this invention is a laterally unconstrained magnetic joint and application of said joint in tip-tilt and piston-tip-tilt optical mounts. The laterally unconstrained magnetic joint in its basic embodiment comprises two interfacing parts: one having a flat surface interfacing a convex surface of the other, wherein one or both parts are made from permanent magnets that are magnetized along the axis of the joint, and the other of the said parts is made from a ferromagnetic material thus creating magnetic force attraction between the two parts. The resulting lack of lateral mechanical constraint between the two parts of the joint is utilized in tip-tilt mounts by decoupling an adjustor and/or actuator from the payload resulting in a simple, uniform design, while magnetic force provides retention sufficient for a wide variety of applications.

The disclosure relates to a bearing assembly for a lithography system, having an optical element, a base, and a bearing device that moveably supports the optical element relative to the base. The bearing device has at least one torsion decoupling element that reduces a transmission of torsional moments between the optical element and the base. The torsion decoupling element has at least two leaf springs which have respective opposing narrow sides and which bring about torsional moments about an axis perpendicular to the narrow sides. The at least two leaf springs are also positioned at an angle to one another and are coupled to one another in such a way that a force flow through the torsion decoupling element simultaneously flows through the at least two leaf springs.