透射式红外镜头的高精度定心装调

依据红外镜头光学系统的设计结果和公差分配,确定了透镜的装框方式和透镜组件的装配方式,并对镜框和镜筒结构进行了特殊设计。利用OptiCentric双光路定心仪对单透镜组件进行了定心。在用销钉对单透镜组件进行定位后,用销钉对各个透镜组件进行了复位。在完成整个镜头定心装调后,在红外传函仪上对镜头进行了像质检测。测试结果表明红外镜头的焦距和各个视场的传递函数均满足要求,说明这种双光路定心装调方法是合理可行的。

High Precision Assembling of Diffractive Infrared Lens

A method for assembling a lens or a lens unit is determined according to the design result and tolerance of an optical system in which an infrared lens is used. The mount and barrel of the lens are designed specially. The center error of the lens unit is measured by an OptiCentric dual-path centrescope. After the lens unit is positioned with pins, each lens unit is reset with pins. When the whole lens unit is assembled, the image quality of the lens is detected in an infrared Modulation Transfer Function (MTF) measurement instrument. The result shows that both the effective focal length and the MTF of the infrared lens unit meet the required specifications and this new dual-path assembling method is reasonable and feasible.