| 基于光斑图像的激光束散角测量方法研究 |
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| 引用本文： | 申琳,杨进华,韩福利,姜会林,王春艳,谢殿广.基于光斑图像的激光束散角测量方法研究[J].兵工学报,2011,32(7):890-895. |
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| 作者姓名： | 申琳 杨进华 韩福利 姜会林 王春艳 谢殿广 |
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| 作者单位： | （长春理工大学 光电工程学院， 吉林 长春 130022） |
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| 摘 要： | 利用光斑图像测量激光束散角,易受相机动态范围的限制,加衰减片又会影响光斑分布特性,从而影响测量精度.利用相机线性响应动态范围特性,提出了可行的测量图像方法,对得到的临界饱和光斑图像使用均值滤波后进行束散角测量,测量不确定度为0.02 mrad；同时提出利用图像融合的方法,通过对曝光不足和曝光过量的光斑图像融合,扩大了相...
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| 关 键 词： | 光电子学与激光技术 激光束散角 二阶矩 临界饱和 图像融合 |
Research on Laser Beam Divergence Angle Measurement Method Based on Spot Image |
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| SHEN Lin,YANG Jin-hua,HAN Fu-li,JIANG Hui-lin,WANG Chun-yan,XIE Dian-guang.Research on Laser Beam Divergence Angle Measurement Method Based on Spot Image[J].Acta Armamentarii,2011,32(7):890-895. |
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| Authors: | SHEN Lin YANG Jin-hua HAN Fu-li JIANG Hui-lin WANG Chun-yan XIE Dian-guang |
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| Affiliation: | (School of Opto-electronic Engineering, Changchun University of Science and Technology, Changchun 130022, Jilin, China) |
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| Abstract: | Laser beam divergence angle measurement by spot image is often restricted by the camera dynamic range.Adding attenuators will affect the distributed characteristics of the spot,thus influence the measurement accuracy.Making use of the camera linear dynamic range,a practicable image measurement method for the divergence angle is presented in this paper.After using the mean filter on the critical saturated spot images,the divergence angle measurement uncertainty can be increased to 0.02mrad.Simultaneously,a method for image fusing is proposed,which fuses the under-exposure and over-exposure spot images,to expand the camera dynamic range,then,the overall distribution characteristics of laser spot can be obtained.The experiment results verify the efficiency and divergence angle measurement accuracy of the proposed method. |
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| Keywords: | optoelectronics and laser laser beam divergence angle second-order moment critical saturation image fusing |
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