Anand Vijayakumar, Katkus Tomas, Juodkazis Saulius
Optical Sciences Centre and ARC Training Centre in Surface Engineering for Advanced Materials (SEAM), School of Science, Swinburne University of Technology, Hawthorn, VIC 3122, Australia.
Melbourne Centre for Nanofabrication, Australian National Fabrication Facility, 151 Wellington Road, Clayton, VIC 3168, Australia.
Micromachines (Basel). 2020 Apr 21;11(4):437. doi: 10.3390/mi11040437.
A new hybrid diffractive optical element (HDOE) was designed by randomly multiplexing an axicon and a Fresnel zone lens. The HDOE generates two mutually coherent waves, namely a conical wave and a spherical wave, for every on-axis point object in the object space. The resulting self-interference intensity distribution is recorded as the point spread function. A library of point spread functions are recorded in terms of the different locations and wavelengths of the on-axis point objects in the object space. A complicated object illuminated by a spatially incoherent multi-wavelength source generated an intensity pattern that was the sum of the shifted and scaled point spread intensity distributions corresponding to every spatially incoherent point and wavelength in the complicated object. The four-dimensional image of the object was reconstructed using computer processing of the object intensity distribution and the point spread function library.
通过随机复用轴锥镜和菲涅耳波带片设计了一种新型混合衍射光学元件（HDOE）。对于物空间中每个轴上点物体，HDOE会产生两个相互相干的波，即一个圆锥波和一个球面波。由此产生的自干涉强度分布被记录为点扩散函数。根据物空间中轴上点物体的不同位置和波长，记录了一个点扩散函数库。由空间非相干多波长源照明的复杂物体产生的强度图案，是对应于复杂物体中每个空间非相干点和波长的移位和缩放后的点扩散强度分布之和。利用物体强度分布和点扩散函数库进行计算机处理，重建了物体的四维图像。
