Dual-wavelength phase imaging for lensless digital holographic microscopy with a filter

Dingnan Deng; Bingfu Huang; Yechang Yu; Yuancong Zhong; Shuhan Cheng; Jinmin Luo

doi:10.1117/12.2666525

27 January 2023 Dual-wavelength phase imaging for lensless digital holographic microscopy with a filter

Dingnan Deng, Bingfu Huang, Yechang Yu, Yuancong Zhong, Shuhan Cheng, Jinmin Luo

Proceedings Volume 12550, International Conference on Optical and Photonic Engineering (icOPEN 2022); 125501N (2023) https://doi.org/10.1117/12.2666525
Event: International Conference on Optical and Photonic Engineering (icOPEN 2022), 2022, ONLINE, China

Abstract

We present a simple and effective method for dual-wavelength phase imaging in Lensless Reflection Digital Holographic Microscopy (LRDHM). A filter is inserted between beam splitter and mirror in LRDHM. By adjusting the filter and mirror, the propagation directions of two reference beams of different wavelengths can be separated, and thus two off axis holograms with different fringe directions are simultaneously captured by a monochrome camera. Our scheme is available for real-time dual-wavelength phase imaging but requires minimum optical element and system modification for LRDHM. A series of simulations on wavefront interference analysis for using a filter is discussed in detail. We demonstrate the validity of proposed method with a step target.

Citation Download Citation

Dingnan Deng, Bingfu Huang, Yechang Yu, Yuancong Zhong, Shuhan Cheng, and Jinmin Luo "Dual-wavelength phase imaging for lensless digital holographic microscopy with a filter", Proc. SPIE 12550, International Conference on Optical and Photonic Engineering (icOPEN 2022), 125501N (27 January 2023); https://doi.org/10.1117/12.2666525

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