Charnotskii Mikhail
J Opt Soc Am A Opt Image Sci Vis. 2019 Aug 1;36(8):1433-1439. doi: 10.1364/JOSAA.36.001433.
Models for the coherence of quasi-monochromatic light from spherical incoherent sources are constructed by placing incoherent monopole and dipole sources on the surface of a sphere. All models allow for relatively simple numerical calculations of coherence functions for arbitrary source sizes and positions of observation points. We show analytically and confirm numerically that the far-field regime for transverse coherence is formed at distances larger than the source size, regardless of the wavelength.
通过将非相干单极子和偶极子源放置在球体表面上，构建了来自球形非相干源的准单色光的相干模型。所有模型都允许对任意源尺寸和观测点位置的相干函数进行相对简单的数值计算。我们通过分析表明并通过数值验证，无论波长如何，横向相干的远场区域在距离大于源尺寸时形成。
