离轴菲涅耳波带片成像的基础研究。

A fundamental study on imaging with an off-axis Fresnel zone plate.

作者信息

Itaya G, Kojima K

出版信息

Radioisotopes. 1978 Dec;27(12):699-704. doi: 10.3769/radioisotopes.27.12_699.

DOI:10.3769/radioisotopes.27.12_699

Abstract

An off-axis Fresnel zone plate, through use of a halftone screen to introduce a spatial carrier frequency, can be used as a large-area, coded aperture for imaging incoherent radiation sources. This paper discusses the structure of off-axis Fresnel zone plate as an aperture and the mentods of imaging from the viewpoint of the spatial resolution by optical simulation, appending some examples of objects, holograms and reconstructed images. It is then concluded that the off-axis Fresnel zone plate having D (diameter) = 5.8 cm and nuc (spatial center frequency) = 23 l/cm is sufficient for the reconstructed images.

摘要

通过使用半色调网屏引入空间载波频率，离轴菲涅耳波带片可用作大面积的编码孔径，用于对非相干辐射源成像。本文从空间分辨率的角度，通过光学模拟讨论了离轴菲涅耳波带片作为孔径的结构和成像方法，并给出了一些物体、全息图和重建图像的实例。最后得出结论，直径D = 5.8 cm且空间中心频率nuc = 23 l/cm的离轴菲涅耳波带片足以获得重建图像。