Focus adjustment apparatus for an image detection system
AssigneeSick AG
InventorChristoph Anselment
Life of this patent
Estimating the term…
Abstract
To achieve a compact construction shape with a long service life, a focus adjustment apparatus for an image detection system is provided which comprises an objective having at least one lens and which comprises a motor device for the positional adjustment of the objective, wherein the lens is provided on a movable lens holder, wherein the movable lens holder is connected to a threaded unit of the motor device via a support unit provided in the movable lens holder such that the support unit can be rolled with the lens holder along a main axis of the threaded unit in accordance with a rotation of the threaded unit and such that an axis of rotation of the support unit is directed perpendicular to the main axis of the threaded unit.
Claims7
A focus adjustment apparatus for an image detection system, the focus adjustment apparatus comprising an objective having at least one lens, wherein the lens is provided on a movable lens holder, and a motor device for the positional adjustment of the objective, characterized in that
- the movable lens holder is connected to a threaded unit of the motor device via a support unit provided in the movable lens holder such that the support unit can be rolled with the lens holder along a main axis of the threaded unit in accordance with a rotation of the threaded unit and such that an axis of rotation of the support unit is directed perpendicular to the main axis of the threaded unit,
- wherein the support unit comprises a cylindrical pin, wherein the cylindrical pin is provided in an inner ring of the support unit coaxial with the axis of rotation of the support unit and projects into a thread turn of the threaded unit, and wherein the threaded unit has a defined thread pitch corresponding to a predefined adjustment of the focal point and a support surface of the thread, on which the cylindrical pin rests or rolls, with a defined thickness, and
- two springs press the support unit in the direction of the threaded unit along the main axis.
Dependencies are inferred from the claim text.