Interferometer instrument transfer function testing method

To acquire the spatial frequency response of the interferometer,the testing method on instrument transfer function( ITF) of interferometer was researched. First,the theoretical calculation model of instrument transfer function of imaging system was established,and the testing model of Fizeau interferometer was simulated via lens design program. Then the theoretical value was calculated and anaysed. Comparing ITF based on the method of sine phase plate with the theoretical ITF,the error is less than 0. 6%,and this method is proved to be feasible via the simulation of the optical design program.