以矩形谱线的光源为例，计算了时间相干度，简要介绍了傅里叶变换光谱学原理。
The author takes light source of the rectangle optical spectrum as an example to calculate time relevant degree and briefly describes Fourier's spectroscopy principle.
数值计算结果表明，光谱开关主要与截断参量、光束菲涅耳数以及光谱相干度有关。
The number of spectral switch increases with increasing Fresnel number and truncation parameter, but.
本文从理论上研究了部分相干情形下，各种相干函数及相干度，对直边象场分布的影响。
This paper deals theoretically with the influences of various kinds of mutual coherence function and the degree of coherence on the distribution of straight-edge generated image field.
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