Optical design of laser zoom projective lens with variable total track

In order to project the laser command information to the proper distance, so a laser zoom projective lens with variable total track optical system is designed in the carrier-based aircraft landing system. By choosing the zoom structure, designing of initial structure with PW solution, correcting and balancing the aberration, a large variable total track with 35 similar to x zoom is carried out. The size of image is invariable that is phi 25m, the distance of projective image is variable from 100m to 3500m. Optical reverse design, the spot is less than 8 mu m, the MTF is near the diffraction limitation, the value of MTF is bigger than 0.4 at 50lp/mm.