Cantaliver error analysis and correction for lateral optics system of photoelectric theodolite

After analyzing the reasons and effect of cantaliver deformation of optic measurement system which was on photoelectric theodolite laterals side. Measurement error brought by it was corrected according to reasonable simplification and mathematic model built by a coordinate transformation method. Then date come from ANSYS theoretic analysis and experiment of one of those theodolites were used to simulating the error model based on MATLAB. And the error model was proved by comparing the simulating result with the practical measurement date, which provides reference and theoretic elements for error analysis and correction of this type photoelectric theodolite.