点扩散函数

点扩散函数（英語：，简称PSF）是描述光学系统对点源解析能力的函数。因为点源在经过任何光学系统后都会由于衍射而形成一个扩大的像点，通过测量系统的点扩展函数，能够更准确地提取图像信息。

参考资料

Rachel Noek*, Caleb Knoernschild*, Justin Migacz*, Taehyun Kim*, Peter Maunz*, True Merrill, Harley Hayden, C.S. Pai, and Jungsang Kim*. (PDF). Optics Letters (Duke University). arXiv:1006.2188.

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