Coordinate measuring device

A method for operating a coordinate measurement apparatus, comprising the following steps:

• providing a coordinate measurement apparatus that includes a carrier which with respect to a base is rotatable about at least two axes, wherein at least in each case one exit optical system and/or entry optical system of the following units are arranged on the carrier in a commonly movable manner,
• at least one optical distance measurement device;
• an infrared light source;
• a fine target detection unit, wherein the fine target detection unit and the distance measurement device have a common exit optical system;
• a second light source;
• a coarse target detection unit, wherein the coarse target detection unit is only sensitive to light in the infrared region;
• the method further comprising the following steps:
• measuring the distance to a measurement aid moveable in space, by way of the optical distance measurement device;
• radiating an infrared target beam by way of the infrared light source and optical elements, wherein the target beam, reflected at the measurement aid, is visible as an infrared target point;
• determining a fine position as the position of the image of the infrared target point on a first position detection sensor of the fine target detection unit;
• radiating light at least in the infrared region by way of a second light source, wherein this light, reflected at the measurement aid, becomes visible as a second target point;
• determining a coarse position as the position of the image of the second target point on a second position detection sensor of the coarse target detection unit;
• automatically aligning the carrier onto the measurement aid by way of rotating about the at least two axes of the carrier by way of a closed-loop control device, in accordance with the fine position and the coarse position.

A coordinate measurement apparatus, comprising:

• an optical distance measurement device;
• a carrier which with respect to a base is rotatable about at least two axes, wherein the carrier by way of rotation about these at least two axes, by way of a closed-loop control device, is configured to be automatically aligned onto a measurement aid movable in space,
• wherein the carrier is rotatable about a tilt axis running at least approximately horizontally in operation of the coordinate measurement apparatus, and about a pivot axis running at least approximately vertically, and wherein a measurement axis does not intersect the tilt axis and/or the measurement axis does not intersect the pivot axis, and,
• wherein a light beam of the distance measurement device is coupled into a beam path of a fine target detection unit by way of a semitransparent mirror, and an axis of the beam path of the fine target detection unit is displaced parallel by way of this semitransparent mirror.