Focus module
AssigneeSick AG
InventorsFlorian Schneider, Tobias Pontiggia, Jonathan Pfeil
Life of this patent
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Abstract
A focus module for an optoelectronic sensor is provided that has a focus adjustable optics, a focus adjustment unit for varying a focal position of the optics, and a focus control to move the optics into a focal position corresponding to a distance value by means of the focus adjustment unit. The focus module here furthermore has a distance sensor for determining the distance value and the focus adjustment unit, the focus control, and the distance sensor are parts of the focus module.
Claims13
A focusing device for an optoelectronic sensor, the focusing device comprising:
- a focus-adjustable optics;
- a focus adjustment unit for varying a focal position of the focus-adjustable optics;
- a distance sensor for determining a distance value;
- and
- a focus control to move the focus-adjustable optics into a focal position corresponding to the distance value by means of the focus adjustment unit,
- wherein the focusing device is configured as an autonomous focus module, the focus module taking care of the focusing independently of a control of the optoelectronic sensor in that focus adjustments are carried out independently, and wherein the focusing device can be retrofitted to the optoelectronic sensor by means of releasable connection elements or can be replaced with another focus module, with the focus adjustment unit, the focus control, and the distance sensor being parts of the focus module,
- wherein the focus adjustment unit comprises a movable carrier element having the focus-adjustable optics and a fixed holding element that each have a surface, and
- wherein a position of the movable carrier element is variable with respect to the fixed holding element for a setting of the focal position, wherein at least one rolled leaf spring is arranged between the movable carrier element and the fixed holding element that rolls on or off the surfaces thereof during movement of the movable carrier element.
An optoelectronic sensor comprising at least one of a light transmitter and a light receiver and at least one focusing device, with the focusing device being associated with the light transmitter and/or the light receiver, the focusing device comprising:
- a focus-adjustable optics;
- a focus adjustment unit for varying a focal position of the focus-adjustable optics;
- a distance sensor for determining a distance value;
- and
- a focus control to move the focus-adjustable optics into a focal position corresponding to the distance value by means of the focus adjustment unit,
- wherein the focusing device is configured as an autonomous focus module, the focus module taking care of the focusing independently of a control of the optoelectronic sensor in that focus adjustments are carried out independently, and wherein the focusing device can be retrofitted to the optoelectronic sensor by means of releasable connection elements or can be replaced with another focus module, with the focus adjustment unit, the focus control, and the distance sensor being parts of the focus module,
- wherein the focus adjustment unit comprises a movable carrier element having the focus-adjustable optics and a fixed holding element that each have a surface, and
- wherein a position of the movable carrier element is variable with respect to the fixed holding element for a setting of the focal position, wherein at least one rolled leaf spring is arranged between the movable carrier element and the fixed holding element that rolls on or off the surfaces thereof during movement of the movable carrier element.
Dependencies are inferred from the claim text.