
Simple equations for tracing rays through the Fresnel zone plate have been derived. The spot diagram constructed by means of the ray tracing shows an appearance of imagery of the Fresnel zone plate as a focusing element. The spot diagram can be obtained not only for the real images but also for the imaginary images. Some demonstrative examples of the spot diagram are given.
| selected citations These citations are derived from selected sources. This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | 0 | |
| popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network. | Average | |
| influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | Average | |
| impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network. | Average |
