Indebetouw G, Bai H
Virginia Polytechnic Institute and State University, Physics Department, Blacksburg, Virginia 24061, USA.
Appl Opt. 1984 Dec 1;23(23):4299-302. doi: 10.1364/ao.23.004299.
Fresnel zone plates are used as pupil apertures to extend the depth of field of an incoherent imaging system. The defocused optical transfer function is evaluated approximately, and the results are confirmed by experiments and by subjective evaluations of the images of a test chart. With a pupil having four zones, for example, the resolution limit at four depths of field out of focus is improved by a factor of 10.
菲涅耳波带片用作光瞳孔径，以扩展非相干成像系统的景深。对离焦光学传递函数进行了近似评估，实验结果以及对测试图图像的主观评估均证实了该结果。例如，对于具有四个区域的光瞳，在四个离焦景深处的分辨率极限提高了10倍。
