Optical measuring probe and method for optically measuring inner and outer diameters

A method for optically measuring inner diameters and/or outer diameters of objects using a measuring machine and an optical measuring probe, the method comprising:

• focusing an optical beam from the optical measuring probe onto a surface of the object, wherein the optical beam in the optical measuring probe is split into a first measuring beam having a first scan point and into a second measuring beam having a second scan point lying diametrically opposed to the first scan point;
• positioning the optical measuring probe on a first measuring position so that the first scan point lies on a first surface of the object;
• positioning the scanning arm on a second measuring position so that the second scan point lies on a second surface of the object;
• and
• determining the distance of the surfaces from the distance between the first measuring position and the second measuring position and a calibration distance between the first scan point and the second scan point.