用光学传递函数精确测定CCD列阵最佳成像位置

基金项目: 国家"八五"重点科技攻关资助项目。

详细信息

Precision Determination of the Best Imaging Position of CCD Array of Space Camera with Optical Transfer Function

School of Electronic Information Engineering & Precision Mechanics, WTUSM, 39 Luoyu Road, Wuhan, China, 430070

摘要: 提出一种直接采用CCD作为光电转换元件,以几何尺寸精密的CCD列阵作为狭缝,进行高精度、高密度的自动采样,扫描"刀刃扩展函数"(ESF)。再配用微型计算机技术,以数字付里叶分析方法测量光学传递函数(OTF)。基于CCD测试OTF的实现,可直接精确判定CCD列阵的最佳成像位置。
- CCD列阵 /
- 光学传递函数 /
- 空间遥感器 /
- 最佳成像位置
Abstract: A measurement method of optical transfer function(OTF)is discribed in this paper,in which charge-coupled device(CCD)in space camera,with an image sampler joined up with a PC,is used directly as an optoelectronic element.Knife edge scanning with high precision and high sampling density and digital Fourier analysis method is adopted.After measuring the defocal MTF curve of space camer-a,the best imageing position is determined precisely.
- CCD array /
- optical transfer function /
- space camera /
- best imaging position