Optimize design of ZFA equal angle shift curve

The relation between shift and multiple of zoom lens always is nonlinear, and the mark sign of distance is also nonlinear. In application to optical detection and measure instruments, it is difficult for operator to get focal value between marks, especially in high multiple area because of serious nonlinear. Proportional move of electromotor causes the nonlinear multiple changing, which make it is hard to reach to stable target value. The program of zoom function included aberration will make such design convenient and quickly. An actual optical system sometimes departs ideal situation, so the aberration facts are added to zoom functions. It makes great progresses in research and design of equal angle shift zoom curve with zoom functions. The results have been applied in product design and caused good effects.