摘要
为了验证柯林斯公式的一种近似计算方法,对光波通过方形孔径光阑及一薄透镜时的衍射图像进行理论计算,并与实验结果进行比较。研究结果表明,理论计算与实验结果一致。利用该方法对透镜的焦距进行了测量,将测量结果与传统方法测得的焦距进行比较,两者误差不到1%。
In order to validate the approximate algorithm of Collins＇ formula, the diffraction images for a light wave that passes a thin lens from a quadrate aperture were evaluated numerically and compared with the experimental results. It is shown that the experimental results are in agreement with the computation results. Therefore, this approximate method is applied to the measurement of the lens focus, and the focus error between the approximate method and traditional method is less than 1%.
出处
《激光技术》
CAS
CSCD
北大核心
2007年第3期295-297,305,共4页
Laser Technology
基金
云南省自然科学研究基金资助项目(2005F0025M)
