摘要:
L'invention se rapporte à une tête optique dans un dispositif d'enregistrement-lecture d'un support d'informations. Une telle tête optique comporte un miroir pivotant (2) permettant de renvoyer la lumière vers le support d'informations (4). Selon l'invention, ce miroir pivotant est monté sur ine assise pivotante (26) possédant une surface de glissement et reposant sur la surface de glissement (30) d'un socle en forme de berceau. Le miroir (2) est monté sur l'assise (26) de telle façon que le centre de courbure des surfaces de glissement soit dans le plan réflecteur du miroir (2). Le réglage de l'orientation du miroir est donc rendu aisé. L'invention s'applique notamment à un energistreur- lecteur de disque optique.
摘要:
An optical switching assembly having an optical path therethrough includes an optical element, a base frame, an optical support that supports the optical element and is pivotably mounted to the base frame, and a linkage. The linkage interconnects the base frame and the optical support to effect movement of the optical support between an aligned position where the optical element is in the optical path and a non-aligned position removed from the aligned position. The linkage has two over-center positions that respectively correspond to the aligned position and the non-aligned position. No additional energy is required to hold the linkage in the over-center positions.
摘要:
A method and an apparatus of a powder bed fusion additive manufacturing system that enables a quick change in the optical beam delivery size and intensity across locations of a print surface for different powdered materials while ensuring high availability of the system. A dynamic optical assembly containing a set of lens assemblies of different magnification ratios and a mechanical assembly may change the magnification ratios as needed. The dynamic optical assembly may include a transitional and rotational position control of the optics to minimize variations of the optical beam sizes across the print surface.
摘要:
A method and an apparatus of a powder bed fusion additive manufacturing system that enables a quick change in the optical beam delivery size and intensity across locations of a print surface for different powdered materials while ensuring high availability of the system. A dynamic optical assembly containing a set of lens assemblies of different magnification ratios and a mechanical assembly may change the magnification ratios as needed. The dynamic optical assembly may include a transitional and rotational position control of the optics to minimize variations of the optical beam sizes across the print surface.
摘要:
A piezoelectric actuator with integrated features to provide coarse position adjustment of a pushing threaded rod and also mechanically amplified piezo motion for fine position adjustment is presented here in three design variants. The mechanical amplifier houses one or more piezo stacks in longitudinal axis with preload to translate an amplified motion in the order of a few times in the transverse axis, perpendicular to the piezo stack motion. The piezo amplifier output travel is transmitted to the threaded rod with a ball at the end to push a desired surface for position adjustments and motion translation in application such as a mirror mount.
摘要:
The invention relates to a head-up display (1), comprising a screen (2), a cover (3) for the screen (2) and a gear mechanism for simultaneously pivoting the screen (2) and the cover (3) around a pivot axis (4) between a first end position and a second end position and concurrently shifting the cover (3) relatively to the screen (2) in such a way that the cover (3) uncovers the screen (2) in the first end position and completely covers the screen (2) in the second end position. Furthermore the invention relates to the use of such a head-up display (1) in a vehicle.
摘要:
An adjustable mounting arrangement for an object (15, 16) to be positioned precisely relative to a base (10), more particularly for a secondary mirror of an optical reflecting telescope, is specified, wherein the mounting arrangement has at least two carrying structures (20; 20a, 20b, 20c, 20d; 20A, 20B, 20C, 20D, 20E, 20F) connected to the base (10) and the object (13, 15, 16); wherein the respective carrying structure (20; 20a, 20b, 20c, 20d; 20A, 20B, 20C, 20D, 20E, 20F) comprises two four-joint carriers (100; 100') of identical type, which are arranged non-parallel to one another and which, together with a cradle (21) having two connecting links (105, 105'), form the respective carrying structure (20; 20a, 20b, 20c, 20d; 20A, 20B, 20C, 20D, 20E, 20F); wherein each four-joint carrier (100; 100') has two struts (22, 23; 24, 25) running non-parallel to one another, said struts in each case being mounted by a first end in an articulated manner on the object (13, 15, 16) in an object-side joint (106, 108; 107, 109); wherein the first strut (22; 25) and the second strut (23; 24) are provided with an outer joint (101, 103; 102, 104) at the respective second end thereof; wherein the outer joints (101, 103; 102, 104) of both four-joint carriers (100, 100') are connected to one another via an assigned connecting link (105, 105'); wherein the distance between the outer joints (101, 103; 102, 104) of each four-joint carrier (100, 100') is less than the distance between the object-side joints (106, 108; 107, 109); wherein a first and a second joint axis (101', 103'; 102', 104') of each four-joint carrier (100, 100') lie in the plane determined by the four-joint carrier (100, 100') or at an angle with respect to said plane; wherein a third and a fourth joint axis (106', 108'; 107', 109') of each four-joint carrier (100, 100') lie in the plane determined by the four-joint carrier (100, 100'); wherein the respective carrying structure (20; 20a, 20b, 20c, 20d; 20A, 20B, 20C, 20D, 20E, 20F) forms a spatial multi-joint structure having the two four-joint carriers (100, 100') coupled to one another; wherein the connecting link (105), on the side thereof offset with respect to the inner side of the four-joint arrangement (100) relative to the connecting straight line between the outer-side joints (101, 103; 102, 104), is provided with a bearing surface (27') of a supporting bearing (27); and wherein the respective carrying structure (20; 20a, 20b, 20c, 20d; 20A, 20B, 20C, 20D, 20E, 20F) is mounted in an articulated manner relative to the base (10) by means of the supporting bearing (27).
摘要:
An actuator device (10) includes a motor (12) and a reduction device (14) operatively coupled to the motor (12) and oriented about a central axis (20). The reduction device (14) is configured to modify an input angle of rotation provided by the motor (12) to an output angle of rotation. Further included is a rotary flexure mechanism (30) that includes a rotary flexure (32) operatively coupled to an output portion of the reduction device (14). The rotary flexure mechanism (30) also includes a plurality of flexure blades (36) coupled to the rotary flexure (32), each of the flexure blades (36) angularly oriented from the central axis (20). The rotary flexure mechanism (30) further includes a diaphragm flexure pair (40,44) operatively coupled to the flexure blades (36). The diaphragm flexure pair (40,44) comprises a rotational and in-plane stiffness greater than an axial stiffness resulting in the rotary flexure mechanism (30) being configured to convert a rotational input to an axial translation.