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Fresnel zone plate: Anomalous foci

 

作者: J. Higbie,  

 

期刊: American Journal of Physics  （AIP Available online 1976）
卷期: Volume 44, issue 10  

页码: 929-930

 

ISSN:0002-9505

 

年代: 1976

 

DOI:10.1119/1.10558

 

出版商: American Association of Physics Teachers

 

数据来源: AIP

 

摘要:

It is found that, when a zone plate is examined in practice, foci exist where there should be none. An approach is developed which reveals that the zone plate is a circular diffraction grating, which in turn explains how a hologram works in a very direct manner.

 

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