学术
摘 要:
研究了泊松亮斑问题.用基尔霍夫积分和菲涅尔半波带法对圆屏后光轴上的光强在近轴和远轴条件下进行了计算,根据实验数据,对圆屏成像公式中的焦距与半径、圆屏遮挡的半波带数及光源波长之间的关系进行了理论分析和讨论.并将圆屏衍射成像与透镜成像作了分析比较,用计算机绘制了物距、像距与圆屏半径关系曲线图,给出的计算数据可在圆屏成像演示实验时作参考.得到圆屏衍射轴上处处有亮点和圆屏位置移动量的计算公式.[著者文摘]
文章出处:
《高师理科学刊》-2007年27卷5期 -41-44页
分 类 号:
文献标识码:
A
文章编号:
1007-9831（2007）05-0041-04
Study of the theory of Poisson spot
DAI Wei （ Department of Mathematics and Computer, Guangdong Business College, Guangzhou 510320, China ）
Abstract:
The Poisson spot is studed. The intensity of diffraction of light is calculated by using methods of Kiychkoff integral and Fresnel half wave belts. Based on datas from the experiment, the theory analysis and discusses on image-forming formula of circular disk diffraction, the number of Fresnel half wave belts in circular disk and the relations on wave length of light source are done. Image-forming of circular disk diffraction and lens are also compared. The curve diagram of the distance of object and image, and disk radius are drew by using computer. The datas by calculation can are used for refrence in experiment. The light spots in the axles of disk and formula of disk moving are gained.[著者文摘]
Key words:
disk diffraction; Poisson spot; laser
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