Optical alignment and field imaging experiment of Fourier telescope

Optical system component of Fourier telescope field imaging experiment system was proposed, optical alignment and test progress were introduced particularly, and imaging experiments for simulation target were carried out. The simulation target was irradiated by laser beams with 3 different frequencies and interference fringes were formed on it. Then the scattering echo energy was received by the segmented primary mirror, and collected by the secondary mirror again, finally come into the compress lens group and was detected by photomultiplier. The experiment result indicates that the stability of support truss excels 0-075 mrad and the angle adjustment accuracy excels 0-05 mrad. The co-focus experiment for the assembled 61 segmented mirrors indicates that the superposition accuracy of the spots- centers of mass is less than 20 mm. The results of field imaging experiment for 3mm simulation target show that the field imaging effect is well consistent with the laboratory and PC emulations. The results provide references for the subsequent experiments of reflected simulation target.