Diffraction optics using at the robot bomb

CCD star tracker is the key equipment of the pose control of space probe such as robot bomb, it works at the broad wavelengths, from the visible wave to the near infrared wave, and the volume has the peculiar request as to satisfy the small space of the whole aerocraft. Based on the actual system (focal length is 60 ∼ 100mm, the F number is 1. 3∼2 and the field of view is 8° ∼ 12°, wave is from 0.48μm ∼ 0.85μm), a new hybrid optical system is put forward, it reduces the secondary color aberration at the broad wavelengths and emends other image errors. The design results show that the system meets the final useful claim.