Multi-interference Space In Figure Portfolio Test The Consistency Of Study

In modern interferometry, the way to acknowledge interferograms is the basic difference between modern and traditional interferometry. Digital spherical interferometer is based on phase-shifting interferometry. It can gather digital interferograms and calculate the wavefront information in them automatically. In absolute test, several objects must be tested and wavefronts are calculated dot to dot. Therefore to ensure the accuracy of the relative position of each objects is the key to control the error. The theory of spatial unity is based on acknowledging interferograms, extracting special characteristic parameters, and analyzing unity accuracy. Thus computer aid adjustment and high accuracy can be realized.Spatial unity in multi-object combination test is researched in this paper. The basic structure and principle of the interferometer are introduced firstly. And then the concept of spatial unity and its requirements in multi-object test are introduced. The control window and core functions are programmed based on aspherical absolute test. In the end, the principle, test steps and error abruption of aspherical absolute test are researched. And the test is carried through by using digital spherical interferometer.