| 摘要 |
An objective (1) having an outer holder (2) and optical elements (3) held therein, in an inner holder (30), wherein the inner holder (30) is linearly guided in the outer holder (2) and mounted so as to be axially displaceable in a curved support (14), and the curved support (14) can be driven by an electric motor, is characterized in that a hollow-shaft drive (5) is present as the drive for the curved support (14), which drive consists of a rotor (9) connected with the curved support (14) and a stator (6) connected with the outer holder (2), wherein the rotor (9) is configured as a cylinder element (11) forming a circumferential groove (10), having permanent-magnet elements (13, 13′, 13″) disposed on at least one inner wall surface (12), and the stator (6) consists of a cylindrical coil (7), which is inserted into the groove (10), locally fixed in the axial direction, for an electromagnetic interaction with the magnet elements (13, 13′, 13″), coaxially to the axis of rotation of the curved support (10). |
| 主权项 |
1. Objective having an outer holder and optical elements held therein, in an inner holder, wherein the inner holder is linearly guided in the outer holder and mounted so as to be axially displaceable in a curved support, and the curved support can be driven by an electric motor, characterized in that a hollow-shaft drive is present as the drive for the curved support, which drive consists of a rotor connected with the curved support and a stator connected with the outer holder, wherein the rotor is configured as a cylinder element forming a circumferential groove, having permanent-magnet elements disposed on at least one inner wall surface, and the stator consists of a cylindrical coil, which is inserted into the groove, locally fixed in the axial direction, for an electromagnetic interaction with the magnet elements, coaxially to the axis of rotation of the curved support. |
