【摘要】 为使嫦娥二号卫星CCD立体相机在100km高度的圆轨上能够获取地元分辨率力为7m的图像,设计了一种两线阵立体测绘CCD相机光学系统。介绍了两线阵立体测绘相机的工作原理。根据卫星总体的指标要求,对光学系统的主要参数进行了详细计算,确定系统的焦距为144.4mm,视场角为42°,相对孔径为F/9,光谱范围为450～520nm。光学系统采用6组7片型消畸变复杂化的双高斯结构形式,在50lp/mm奈奎斯特空间频率下平均调制传递函数为0.67。给出了嫦娥二号卫星CCD立体相机在100km高度的首轨图像和极区图像,图像清晰、层次丰富,表明该光学系统能满足任务要求。更多还原

【Abstract】 In order to obtain the image of 7 m resolution with the Chang′E-2 CCD stereoscopic camera on the 100-km-altitude circular orbit,a two-linear array CCD camera stereoscopic mapping optical system is designed.The principle of two-linear array stereo mapping camera is described.According to the satellite requirements,the main parameters of the optical system are calculated detailedly.The focal length of the system is 144.4 mm,the view angle is 42°,the relative aperture is F/9,and the spectral range is 450~520 nm.The optical system adopts six groups of seven pieces type complicated double Gaussian structure with distortion elimination,for which the average modulation transfer function is 0.67 at 50 lp/mm Nyquist spatial frequency.The 100 km first rail images and polar region image of Chang′E-2 satellite CCD stereoscopic camera are obtained.The images are clear and rich of detail information,demonstrating the effectiveness of the optical system.更多还原