在轨光学相机探测图像数字仿真系统的设计与实现

程军; 张伟; 鲍文卓; 曹移明; 丛明煜

光学精密工程, 2009, 17 (9): 2136, 网络出版: 2009-10-28

在轨光学相机探测图像数字仿真系统的设计与实现

Design and implementation of digital simulation system for detecting image of orbiting optical camera

论文大纲

程军 ^*张伟鲍文卓曹移明丛明煜

作者单位

哈尔滨工业大学空间光学工程研究中心,黑龙江哈尔滨 150001

在轨光学相机探测图像数字仿真天基光学测量 orbiting optical camera detection image digital simulation space-based optical measurement

摘要

在轨光学相机探测图像数字仿真系统可为空间相机的方案设计、信息处理算法研究与验证及地面性能测试等提供技术支持。本文根据在轨光学相机测量原理与工作环境,建立了空间目标的相对运动学与反射光学特征模型、相机成像模型以及背景恒星成像模型;分析了相机测量噪声及相机探测灵敏度并在仿真中考虑了干扰因素对成像质量的影响,完成了现有星表中背景恒星的视星等,根据相机的探测波段范围进行了仪器星等的等效计算(探测星等>9 mV,计算误差<10%),提高了仿真图像的逼真度;最后,根据相机工作原理设计了仿真流程,应用Visual C++与Open×GL技术实现了仿真软件并根据具体的在轨光学相机CCD与光学系统参数对探测图像生成方法进行了仿真验证。结果表明,该系统能够满足空间相机研制与性能测试的要求。

Abstract

The detecting image simulation for an orbiting camera has played an important role in the feasibility argumentation,the research of information processing method and the test of orbiting optical camera on the ground. In this paper,a relative kinematics model,a catoptric character model,an imaging model of camera,and an imaging model of background stars are established and the digital simulation system for detecting images of an orbital optical camera is designed and realized on the basis of the measurement principle and work environments of space-based optical cameras. Measurement noises and detecting sensitivity are analyzed and the effect of all kinds of disturbing factors on the images are taken into accounts in the simulation modeling. The equivalent calculation from the visible magnitudes of background stars to instrument magnitudes is conducted through the detecting wave band of the camera to improve the fidelity of simulated images (detecting magnitude>9 mV,calculating error<10%). Finally,the simulation software is implemented by means of Visual C++ and OpenGL on the basis of designing simulation flows. The simulation and validation of detecting images is undertaken according to the CCD and optic system parameters of the orbiting optical camera. The conclusion can be drawn that this system provides technical supports for the scheme design and performance test of the camera.

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程军, 张伟, 鲍文卓, 曹移明, 丛明煜. 在轨光学相机探测图像数字仿真系统的设计与实现[J]. 光学精密工程, 2009, 17(9): 2136. CHENG Jun, ZHANG Wei, BAO Wen-zhuo, CAO Yi-ming, CONG Ming-yu. Design and implementation of digital simulation system for detecting image of orbiting optical camera[J]. Optics and Precision Engineering, 2009, 17(9): 2136.

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