摘要
根据等倾干涉原理,对高斯光束经薄膜反射后的光强、可见度、条纹分布进行了理论分析,讨论了入射角对光强、可见度分布的影响,相位角对条纹可见度的影响.数值模拟计算表明:沿着垂直于光传播方向的平面,反射光束叠加区域为一圆斑,随着入射角的增大,可见度逐渐减小,光强分布偏离了高斯分布,光斑变大,峰值减小.干涉条纹在空间的分布类似于平面波的薄膜等倾干涉,主要由入射角及薄膜厚度决定.
Based on interference principle of equal inclination. The distribution of intensity, visibility and fringes were analysed theoretically,and the influence of incidence angle on the distribution of intensity and visibility and of phase angle on the distribution of fringes by medium film reflection for a Gaussian beam discussed. Numerical calculation results show, on a plane vertical to the direction of light propagation, it is a circular spot for reflected light in the region of super-position. With the increase of incidence angle, the visibility reduced gradually, the reflected intensity deviated from Gaussian distribution, the size of beam spot broadened, the peak value reduced. The distribution of fringes by medium film reflection for a Gaussian beam in space is similar to that of a plane light, which is mainly decided by incidence angle and thickness of medium film.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2006年第9期1400-1403,共4页
Acta Photonica Sinica
关键词
高斯光束
等倾干涉
可见度
条纹密度
Gaussian beam
Equal inclination
Visibility
Density of fringes
