The optical-electronic autoreflection sensor for measurement an angle of rotation

摘要

The autoreflection systems allows measuring a mirror turning angle as sensitive element in a point of angular deformation with a potential accuracy up to 0.05". Actually the error can exceed considerably the specified value because of existence of systematic error, one of which main components is the error owing to vignetting of a working beam. The component of systematic error due to vignetting of the beam can be eliminated using the compensation algorithm which allows to increase the working distance at the autoreflection measurements. This algorithm bases on vignetting coefficients. In this article we have found the vignetting coefficients using an autoreflection system.