Computer-aided Alignment of Off-axis Aspheric Mirrors in Null Testing

Research on optical design and mounting method of large-aperture off-axis collimator

“…Finally, the initial structure of the system was calculated in Cassegrain form, and then the main mirror was designed off-axis to overcome the center blocking problem of the coaxial system [6] . The collimator for detection is used as the reference beam for imaging quality evaluation in the optical system [7][8] , and its own optical quality directly affects the accuracy of the image quality evaluation of the detected system. According to the imaging quality requirements of the detected optical transmitter and receiver and the accuracy of geometric calibration [1][2] , the main technical parameters of the parallel light tube should meet the demand that the Root Mean Square (RMS) of the main mirror is better than 1/40 λ and the RMS of the system is better than 1/15 λ.…”