Sabatyan A, Hoseini S A
Appl Opt. 2014 Nov 1;53(31):7331-6. doi: 10.1364/AO.53.007331.
An axilens is a combination of an axicon and a Fresnel zone plate to provide a long focal diffractive lens. However, the photon sieve has been known as a high-resolution version of the Fresnel zone plate. Therefore, construction of an axilens on the basis of a photon sieve may yield a high-resolution axilens. To this end, circular zones of an axilens were replaced by a given distribution of pinholes. It is shown that lateral resolution of the axilens is increased due to the replacement. The impact of different distributions of pinholes on the focusing properties of the axilens were also examined. Results indicate that by implementing different distributions of pinholes resolution and focal depth are changed and hence, are manageable. Theoretical results are verified by experimental work.
轴棱菲涅耳透镜是轴锥镜和菲涅耳波带片的组合，用于提供长焦距衍射透镜。然而，光子筛被认为是菲涅耳波带片的高分辨率版本。因此，基于光子筛构建轴棱菲涅耳透镜可能会产生高分辨率的轴棱菲涅耳透镜。为此，将轴棱菲涅耳透镜的圆形区域替换为特定分布的针孔。结果表明，由于这种替换，轴棱菲涅耳透镜的横向分辨率有所提高。还研究了不同针孔分布对轴棱菲涅耳透镜聚焦特性的影响。结果表明，通过采用不同的针孔分布，分辨率和焦深会发生变化，因此是可控的。理论结果通过实验工作得到了验证。
