Abstract: The invention relates to an optical element that is to be mounted on a shaft, particularly a spindle shaft, in order to deflect a laser beam. The laser beam is deflected via a first and a second mirror surface. At least one additional surface is provided for reducing centrifugal forces and gyroscopic moments acting upon the shaft.

Abstract: The invention relates to a gas bearing of a rapidly rotating shaft, whose end supports a tool, in particular to a gas bearing of a rapidly rotating shaft, whose end supports a polygon mirror (27) for a spindle of an optical application. To provide radial support along the shaft (3), gas bearings are arranged in a housing (5), whereby a first gas bearing (9) and a third gas bearing (8) are positioned concentrically in relation to one another and a second gas bearing (2), which is located midway between the first gas bearing (9) and the third gas bearing (8), is mounted in an eccentrically offset manner to the first gas bearing (9) and the third gas bearing (8). The invention is also provided with an adjusting device (1) for increasing the eccentric offset of the second gas bearing (2) as the rotational speed of the shaft (3) increases.

Abstract: The invention relates to a dynamic gas bearing of a motor spindle comprising a rotating shaft that is received in a housing on gas bearings in the radial and axial direction, said shaft comprising a polygonal mirror in a polygonal room, for radially bearing along the shaft at least one radial gas bearing and for axially bearing a front and a rear gas bearing. The ratio of the bearing gap of the rear axial bearing combined with the bearing gap of the front axial bearing attains at least the value 2.

Abstract: The invention relates to a gas bearing of a rapidly rotating shaft, whose end supports a tool, in particular to a gas bearing of a rapidly rotating shaft, whose end supports a polygon mirror (27) for a spindle of an optical application. To provide radial support along the shaft (3), gas bearings are arranged in a housing (5), whereby a first gas bearing (9) and a third gas bearing (8) are positioned concentrically in relation to one another and a second gas bearing (2), which is located midway between the first gas bearing (9) and the third gas bearing (8), is mounted in an eccentrically offset manner to the first gas bearing (9) and the third gas bearing (8). The invention is also provided with an adjusting device (1) for increasing the eccentric offset of the second gas bearing (2) as the rotational speed of the shaft (3) increases.

Abstract: Gas bearing arrangement for a rapidly rotating shaft with a tool installed at one end including a stationary housing, at least first, second and third bearings arranged in the housing for radially supporting the shaft, the second bearing being arranged between the first and third bearings and each bearing defining a bearing bore, and an adjusting mechanism for adjusting at least one bearing so that the bearing bore thereof may be operatively eccentrically offset relative to the bearing bores of the other bearings. In one embodiment, the bearing bores of the first and third bearings are concentric to each other and the adjusting mechanism is operative on the second, middle bearing.

Abstract: A spindle for a gas bearing of a rapidly rotating tool, including a spindle housing, a bushing arranged in the housing, at least one ceramic bearing pressed into the bushing over substantially the entire length thereof and a rotating shaft gas-supported in the housing in the axial and radial direction by the bearings such that a gap remains between the shaft and the bearings. In order to control the narrowing of the gap formed between the shaft and the bearings, the material and thickness of the bushing and bearing are selected such that the product of elasticity module and wall thickness of the bushing is at least about 1.8 times greater than the product elasticity module and wall thickness of the bearing.

Abstract: A spindle for gas bearing of a rapidly rotating tool, in particular for aerostatic bearing arrangement of an open-end spinning rotor, including a spindle housing, a rotatable elongate shaft supported in the spindle housing in a radial direction of the shaft by a radial gas bearing element and an elongate extension rod. The rotor is coupled to the extension rod at a first end thereof. An extension rod bearing element is arranged at a region proximate the first end of the extension rod at which the rotor is attached. A first bearing clearance is defined between the radial bearing element and the shaft and a second bearing clearance is defined between the extension rod and the extension rod bearing element which is at least twice the first bearing clearance.