| 利用三次样条插值提高自准直仪的准确度 |
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| 引用本文： | 吴文明,高立民,吴易明,吴璀罡,白建明.利用三次样条插值提高自准直仪的准确度[J].光子学报,2007,36(8):1561-1564. |
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| 作者姓名： | 吴文明 高立民 吴易明 吴璀罡 白建明 |
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| 作者单位： | 1. 中国科学院西安光学精密机械研究所,西安,710119;中国科学院研究生院,北京,100039
2. 中国科学院西安光学精密机械研究所,西安,710119 |
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| 基金项目： | 致谢：感谢各位老师和同事在实验及论文撰写过程中给予的帮助和建议. |
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| 摘 要： | 为了提高自准直仪的准确度,利用三次样条插值法对CCD像元进行细分,并利用直线边缘拟合法检测图像边缘.实验采取独立的测量手段,将自准直仪的实际转角和算法计算得到的角度值进行比较,分析其准确度.实验结果表明,该方法能明显提高自准直仪的准确度,准确度达到0.1角秒.
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| 关 键 词： | CCD细分 边缘定位精度 三次样条插值 直线边缘拟合 自准直仪 |
| 文章编号： | 1004-4213（2007）08-1561-4 |
| 收稿时间： | 2006-03-31 |
| 修稿时间： | 2006-04-07 |
Improving Precision of Autocollimation with Cubic Spline Interpolation Functions |
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| WU Wen-ming,GAO Li-min,WU Yi-ming,WU Cui-gang,BAI Jian-ming.Improving Precision of Autocollimation with Cubic Spline Interpolation Functions[J].Acta Photonica Sinica,2007,36(8):1561-1564. |
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| Authors: | WU Wen-ming GAO Li-min WU Yi-ming WU Cui-gang BAI Jian-ming |
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| Abstract: | Because of the CCD pixel size,the precision of autocollimation is above arcsec level which is far from high level meterage.Cubic Spline Interpolation Functions was used to subdividing CCD pixel,then beeline edge fitting was used to detecting the edge of image to improve the precision of autocollimation.Unaided measurement was used in the experiment,angles from turning autocollimation and calculating was compared,then the precision of arithmetic was analyzed.The precision of autocollimation was obviously improved by using the arithmetic,0.1 arc second precision was achieved in the result. |
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| Keywords: | CCD subdivision Precision of edge location Cubic spline interpolation functions Beeline edge fitting Autocollimation |
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