For its excellent performance on extending the depth of field of the incoherent imaging system, wave-front coding (WFC) has been the research hotspot for many years.
波前编码成像由于可以大大扩展非相干成像系统的景深而不降低像质，成为近年来的研究热点。
In the purpose of using non-diffracting beams to extending the depth-of-field of optical imaging system, the variation rules of the central spot of non-diffracting beams are investigated.
为了将无衍射光应用于大景深成像系统中，分析了无衍射光束中心光斑的变化规律。
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