Research on the Methods to Compensate the Systematic Error at Optical Autoreflection Angular Measurements

Autoreflection measurement devices have very wide applications in produce of instrument, machine and metrical technology. They are used for ensuring status of details, units and planes, and for the control of the displacement of revolving converters, in the national standard planar angle. The main systematic error in autoreflection measurement methods is an error caused by vignetting. The analytic research of function describing this error was made. The experiment was made to ensure the analytical results. The parameters of experimental device were the following. The distance from the mirror 8 m, aperture of the receiving objective 65 mm, aperture of the mirror 78 mm, diameter of the radiating surface of the LED 2mm