长焦距航空相机光学系统设计

航空相机是装载在飞机上用以拍摄地表景物来获取地面目标的光学仪器。为满足远距离摄影的要求,需要物镜有较长的焦距,以使远处的物体在像面上有较大的像。因此,设计了长焦距航空相机。设计焦距为550 mm,F数为6,视场2ω=9°的长焦距航空相机光学系统。在对长焦距航空相机的物镜进行设计时,首先,选取双高斯物镜作为初始结构。为了提高系统的像质,可使用ZEMAX对系统进行优化。对优化后的系统进行标准化及公差分析,最后得到符合要求的光学系统。该系统在每毫米80对线空间频率下,MTF大于0.15,具有良好的像质。

Design of Long Focal Length Aviation Camera Optical System

Aviation camera is a kind of airborne optical instrument, which acquire the targets on ground through shooting ground sceneries. For meeting the requirements of long range shooting, long focal length object lens is needed to obtain bigger size images of the objects far away in image plane. A long focal length aviation cam？era optical system is designed at focal length 550 mm, F number 6 with field 2ω=9°. Double Gauss object lens is se？lected as an initial structure in the design of the object lens of the long focal length aviation camera. The system is optimized by ZEMAX to improve image quality. The optimized system is standardized and performed tolerance anal？ysis to obtain the needed optical system. The system has good image quality under 80 pairs per millimeter spatial frequency and MTF is more than 0.15.