Abstract: A microlens array diffuser operable to generate a substantially diffuse illumination includes an array of microlenses, wherein each microlens has a respective periodicity-influencing characteristic and a respective surface profile. The array of microlenses includes at least two microlenses having respective periodicity-influencing characteristics that differ from one another and having respective surface profiles that differ from one another. Each surface profile is configured to generate a substantially equal field of illumination. The microlens array diffuser can be integrated as part of an illuminator operable to generate substantially diffuse illumination.

Abstract: A microlens array diffuser operable to generate a substantially diffuse illumination includes an array of microlenses, wherein each microlens has a respective periodicity-influencing characteristic and a respective surface profile. The array of microlenses includes at least two microlenses having respective periodicity-influencing characteristics that differ from one another and having respective surface profiles that differ from one another. Each surface profile is configured to generate a substantially equal field of illumination. The microlens array diffuser can be integrated as part of an illuminator operable to generate substantially diffuse illumination.

Abstract: A screw drive with rolling elements, optionally a ball screw drive, includes a screw spindle with a spindle axis and a double nut running on the screw spindle, with two separately formed single nuts which are substantially rigidly joined in the direction of the axis of the spindle. In order to set a desired play or bias relative to the screw spindle, the two single nuts can be turned continuously about the axis of the spindle relative to each other and fixed in any relative rotary position corresponding to the desired play or bias. According to the invention, a first of the two single nuts or an intermediate element joined thereto and arranged between the two single nuts has at least one peripheral section pressed into an associated aperture in one of the single nuts. In one embodiment, the intermediate element is an annular disk that is arranged orthogonally to the spindle axis.

Abstract: In an arrangement for determining the relative position of two bodies (3, 7) that are movable relative to each other, a separate measuring tape (29) is attached to a first (3) of the two bodies (3, 7). The measuring tape includes at least one track of measuring markings, distributed in the longitudinal direction of the tape. The second (7) of the two bodies (3, 7) carries a sensor arrangement (31) which responds to the measuring markings and travels along the track, in the course of relative movement between the two bodies (3, 7). The measuring tape (29) is attached to the first body (3), at at least two attachment points that are arranged at a distance from each other in the longitudinal direction of the tape, and is elastically stretched between the attachment points in the longitudinal direction of the tape.

Abstract: In an arrangement for determining the relative position of two bodies (3, 7) that are movable relative to each other, a separate measuring tape (29) is attached to a first (3) of the two bodies (3, 7). The measuring tape includes at least one track of measuring markings, distributed in the longitudinal direction of the tape. The second (7) of the two bodies (3, 7) carries a sensor arrangement (31) which responds to the measuring markings and travels along the track, in the course of relative movement between the two bodies (3, 7). The measuring tape (29) is attached to the first body (3), at at least two attachment points that are arranged at a distance from each other in the longitudinal direction of the tape, and is elastically stretched between the attachment points in the longitudinal direction of the tape.

Abstract: A screw drive with rolling elements, optionally a ball screw drive, includes a screw spindle with a spindle axis and a double nut running on the screw spindle, with two separately formed single nuts which are substantially rigidly joined in the direction of the axis of the spindle. In order to set a desired play or bias relative to the screw spindle, the two single nuts can be turned continuously about the axis of the spindle relative to each other and fixed in any relative rotary position corresponding to the desired play or bias. According to the invention, a first of the two single nuts or an intermediate element joined thereto and arranged between the two single nuts has at least one peripheral section pressed into an associated aperture in one of the single nuts. In one embodiment, the intermediate element is an annular disk that is arranged orthogonally to the spindle axis.

Abstract: A screw drive (10a) with rolling elements, optionally a ball screw drive, includes a screw spindle with a spindle axis (S) and a double nut (14a) running on the screw spindle, with two separately formed single nuts (16a , 18a) which are substantially rigidly joined in the direction of the axis (S) of the spindle. In order to set a desired play or bias relative to the screw spindle, the two single nuts (16a, 18a) can be turned continuously about the axis (S) of the spindle relative to each other and fixed in any relative rotary position corresponding to the desired play or bias. According to the invention, a first of the two single nuts or an intermediate element (28a) joined thereto and arranged between the two single nuts, as a first alternative, is welded to one of the two single nuts or to at least one part (42a) joined thereto or, as a second alternative, has at least one peripheral section pressed into an associated aperture in one of the single nuts.