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| 红外系统后向反射光的光强研究 | |
| 引用本文： | 张大勇, 刘常龄, 袁永华. 红外系统后向反射光的光强研究[J]. 强激光与粒子束, 2001, 13(03). |
| 作者姓名： | 张大勇 刘常龄 袁永华 |
| 作者单位： | 1.中国工程物理研究院 流体物理研究所, 四川 绵阳 621 900 |
| 摘 要： | 根据衍射光学理论分析了红外系统后向反射光强的分布，反射区域可以分成近场传输区域、菲涅耳衍射区域和夫琅和费衍射区域。在菲涅耳衍射区域内，反射光斑中心光强是呈明暗变化的，反射光斑中心光强在0～1km内剧烈振荡，1～3km之间达到峰值，然后随传输距离的继续增加，反射光斑中心光强逐渐减小。在夫琅和费衍射区域内，光斑图像中央是亮光斑，周围环绕着明暗交替的圆环。 |
| 关 键 词： | 红外系统 菲涅耳衍射 夫琅和费衍射 |
The research of laser intensity reflected from infrared system |
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| zhang da-yong, liu chang-ling, yuan yong-hua. The research of laser intensity reflected from infrared system[J]. High Power Laser and Particle Beams, 2001, 13. | |
| Authors: | zhang da-yong liu chang-ling yuan yong-hua |
| Affiliation: | 1. Institute of Fluid Physics,CAEP .P.O.Box 919-113,Mianyang 621900,China |
| Abstract: | According to the theory of diffraction, the distribution of laser intensity reflected from infrared system is analyzed. The diffraction pattern of spot center intensity in different transmission distance is studied and the relationship between spot intensity and radius is established. The reflection region can be divided into the transmission area, Fresnel diffraction area and Fraunhofer diffraction area. In Fresnel diffraction area, the intensity of spot center change light to dark. The intensity of spot center change violent vibration from 0~1km, and reach peak value between 1~3km, then reduce gradually with the reflection distance increasing. In Fraunhofer diffraction area, the spot center is light spot, around encircle light and dark ring. |
| Keywords: | infrared system fresnel diffraction fraunhofer diffraction |
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