本文设计了一种应用于测绘型数字航空摄影相机的新型镜间快门, 该快门具有结构紧凑、布局合理及可靠性高等特点,快门采用双叶片结构形式实现了五叶片快门同样高的快门效率。快门通过小型化设计, 实现同轴轮系按不同传动比驱动双叶片旋转实现控制曝光的目的。控制电机转速连续调节叶片转速, 可获得合适曝光量。对快门进行了模拟和实验分析, 实验结果表明, 快门的曝光时间范围达到1/100 s～1/1000 s, 效率达到85%, 快门对光学畸变影响小,具有曝光时间范围广、快门效率高和刚度较大等优点,同时刚度和强度满足相机的使用要求。

In this study, a novel type of lens shutter with compact structure, reasonable layout and high reliability was designed for use in digital aerial photography mapping cameras. The double-blade shutter achieved the same shutter efficiency as a five-blade shutter. A coaxial gear train with different transmission ratios drives the double-blade rotation by miniaturized design, thereby controlling exposure. The speed of the blade is varied continuously by controlling motor speed, which helps attain the appropriate exposure. Simulation and experimental analysis of the shutter indicates that the range of shutter exposure time reaches 1/100 s-1/1000 s, and the shutter efficiency can increase to 85%. The shutter with wide exposure time and high shutter efficiency is found to have small effects on optical distortion, and sufficient stiffness to meet the camera requirements.