基于无透镜数字全息的显微成像系统

基于无透镜数字全息成像与再现的原理和范西泰特-泽尼克定理,对同轴无透镜数字全息显微成像系统可测量微颗粒的大小范围以及各元件之间的距离进行了推导,得到了较为准确的数据并设计搭建了系统。结果表明,无透镜数字全息显微成像系统相较于传统显微镜有不受空气中灰尘的干扰、视场大且可通过计算机处理提高图像质量等优点。通过用设计的系统观察直径在2～10μm的金刚砂,并与显微镜观察的图像做对比,证明了理论推导与结果相一致。

Microscopy Imaging System based on Lensless Digital Holography

Based on the principle of lensless digital holographic imaging and reconstruction and Van Sitter - zernike''s theorem, the size range of micro-particles and the distance between various elements that can be measured by the coaxial lensless digital holographic microscopic imaging system are deduced, and more accurate data are obtained and the system is designed and built.The results show that compared with the traditional microscope, the lensless digital holographic microscopic imaging system has the advantages of not being disturbed by dust in the air, having a large field of view and being able to improve the image quality through computer processing. By using the designed system to observe carborundum with a diameter of 2 - 10 microns and comparing it with the image observed by a microscope, it is proved that the theoretical derivation is consistent with the results.