A compact and lensless digital holographic microscope setup

Yan Hu; Chao Zuo; Jiasong Sun; Qian Chen; Yuzhen Zhang

doi:10.1117/12.2189634

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17 July 2015 A compact and lensless digital holographic microscope setup

Yan Hu, Chao Zuo, Jiasong Sun, Qian Chen, Yuzhen Zhang

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Proceedings Volume 9524, International Conference on Optical and Photonic Engineering (icOPEN 2015); 952426 (2015) https://doi.org/10.1117/12.2189634
Event: International Conference on Optical and Photonic Engineering (icOPEN2015), 2015, Singapore, Singapore

Abstract

We design a holographic system which is lensless and compact. There is a beam expander in conventional holographic setup to produce parallel light and then with a beam splitter to separate the light into two parts. One is used to illuminate the objects and the other one as the reference light. In our system, instead of utilizing beam expander to generalize parallel beam, the laser is directly produced by a fiber, which provides a spherical wave with a center in the out port of fiber. For this reason, our system contains less optical components so that the setup would be more compact. The only needed processing is to eliminate the second-order aberration caused by different distance between two path and the off-axis to a small extent. An experiment of aberration compensation by using principle component analysis is given, and the result shows that the system works well.

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Yan Hu, Chao Zuo, Jiasong Sun, Qian Chen, and Yuzhen Zhang "A compact and lensless digital holographic microscope setup", Proc. SPIE 9524, International Conference on Optical and Photonic Engineering (icOPEN 2015), 952426 (17 July 2015); https://doi.org/10.1117/12.2189634

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