Research of the Influence of Rectangular Prism Pien Error on Angle Measurement for Photoelectric Autocollimator

Photoelectric autocollimator is a kind of small angle measuring instrument of high accuracy. For the increasing demand of the measurement accuracy, each link to affect the precision of photoelectric autocollimator needs to be analyzed and derived. In view of the analysis of the lack for the right angle prism pien errors which effect on the measurement precision, this paper adopts the method of vector analysis and coordinate transformation, to solve the relationship between the image type photoelectric autocollimator reticules imaging and prism space angle. On this basis, analyze the influence of the right angle prism error on the measurement. To verify the correctness of test derivation, using a type of photoelectric autocollimator and right angle prisms for experiments, the test results coincide with the conclusion of theoretical derivation.