Research On The Relative Distortion Of Optical Sighting Telescope

This measuring system is specially designed to solve the relative distortion of the optical sighting telescope for some factory. The distortion is the differencingr of the actual and Gaussian image height,which don't affect the definition of image,but could affect the image's reality degree. As far as the optical sighting telescope is concerned,it is required to take aim with high precision,So the numerical value of distortion is very important to the whole systemic working performance.Distortion is based on a function of field, so measureing the viewing field of the optical sighting telescope,then through the functional relationship between the distortion and the viewing field to get the numerical value of the distortion. After reading lots of documents,we discussed the concept and the mathematical model of distortion. Secondly, comparing with the testing methods of the viewing angle, then choosing the electronic theodolite as the main test equipment and the wide field collimator as the auxiliary test equipment, at the same time,describing some parameters of the system in detail. Finally through debuging and testing to get experimental results, which were recorded in tabular form.By analyzing results of the relative distortion, it meets the requirements of the technical target:field>10°, the accuracy is better than 0.3%; 3°= field=10°, accuracy of better than 0.1%. Therefore, this test system is simple and efficient, so for the research and production, it all have great reference value.