Measuring apparatus

A measuring apparatus for contactless detection of a distance between a surface of a measurement object and the measuring apparatus, and for simultaneous contactless visual detection of the surface, the apparatus comprising:

• a measuring head including and holding a distance measuring device, a camera apparatus, and an illumination device;
• wherein the illumination device is configured and arranged to illuminate an operating point on the surface of the measurement object that is simultaneously focused on by the camera apparatus and the distance measuring device;
• and
• a mirror and filter device located on an optical axis between the illumination device and the operating point, the mirror and filter device having at least one dichroic mirror that transmits or reflects light beams as a function of wavelength and splits light reflected by the operating point between the distance measuring device and the camera apparatus;
• wherein the illumination device including at least thee punctiform light sources arranged on an annular contour relative to the optical axis.

A measuring apparatus for contactless detection of a distance between a surface of a measurement object and the measuring apparatus, and for simultaneous contactless visual detection of the surface, the apparatus comprising:

• a measuring head including and holding a distance measuring device, a camera apparatus, and an illumination device;
• wherein the illumination device is configured and arranged to illuminate an operating point on the surface of the measurement object that is simultaneously focused on by the camera apparatus and the distance measuring device;
• a mirror and filter device located on an optical axis between the illumination device and the operating point, the mirror and filter device having at least one dichroic mirror that transmits or reflects light beams as a function of wavelength and splits light reflected by the operating point between the distance measuring device and the camera apparatus;
• wherein the illumination device including at least three punctiform light sources arranged on an annular contour relative to the optical axis;
• and
• wherein the punctiform light sources are aligned at an angle less than 15 degrees to the optical axis.

A method for contactless detection and recordation of cooling air bores in a turbine blade, the turbine blade having a renewed thermal barrier coating on an outer surface thereof which at least partially stops up at least one of the cooling air bores, the method comprising:

• providing a measuring apparatus comprising
• a measuring head including and holding a distance measuring device, a camera apparatus, and an illumination device,
• wherein the illumination device is configured and arranged to illuminate an operating point on the surface of the measurement object that is simultaneously focused on by the camera apparatus and the distance measuring device, and
• a mirror and filter device located on an optical axis between the illumination device and the operating point, the mirror and filter device having at least one dichroic mirror that transmits or reflects light beams as a function of wavelength and splits light reflected by the operating point between the distance measuring device and the camera apparatus;
• and
• measuring the position of said at least one partially stopped up cooling air bore with the measuring apparatus.