An aerial camera focusing system of wide range and high dynamic

According to the project, this paper introduces an aerial camera focusing system. The system uses the screw to achieve horizontal movement of the lens, and turn the actuator. The connection of the system is coaxial connector, which can avoid the error of the gear mechanism. It is going to use Kepler telescope optical system to get larger divergence angle changes with smaller stroke of lens. When the system is working, we only need to control the space of the focus optical system to complete focusing. The system completes wide range and high dynamic focal length adjustment finally by modifying the transfer function and control parameters constantly. Comparing with the traditional methods of focus length adjustment, the system solves the problem of small adjustment range, poor dynamic characteristics, poor linearity and multi-level cascade, at the same time, the system has a simple structure, high stability, low cost of manufacture. We show the conclusions getting from the data.