Abstract

In this paper, a lensless microscope based on ptychography is presented. It disposes of the mechanic movement necessary for conventional ptychography, instead using an LED matrix to obtain a diverse set of diffraction data. This data is subject to multiple experimental factors that deviate from the standard version of ptychography: namely, imprecise knowledge of the LED positions, partial temporal and spatial coherence, and varying brightness and illumination distribution between individual LEDs. Despite these difficulties, we show here that the diversity in the ptychographic data allows an iterative phase retrieval algorithm to recover excellent, high-resolution images of a resolution test target and a biological sample.

© 2018 Optical Society of America

Single-shot lensless imaging via simultaneous multi-angle LED illumination

You Zhou, Jiamin Wu, Jinli Suo, Xiaofei Han, Guoan Zheng, and Qionghai Dai
Opt. Express 26(17) 21418-21432 (2018)

Near-field ptychographic microscope for quantitative phase imaging

Samuel McDermott and Andrew Maiden
Opt. Express 26(19) 25471-25480 (2018)

High-speed ptychographic imaging based on multiple-beam illumination

Xiaoliang He, Suhas P. Veetil, Xingchen Pan, Aihui Sun, Cheng Liu, and Jianqiang Zhu
Opt. Express 26(20) 25869-25879 (2018)

Lensless phase microscopy and diffraction tomography with multi-angle and multi-wavelength illuminations using a LED matrix

Chao Zuo, Jiasong Sun, Jialin Zhang, Yan Hu, and Qian Chen
Opt. Express 23(11) 14314-14328 (2015)

Ptychographic microscope for three-dimensional imaging

T. M. Godden, R. Suman, M. J. Humphry, J. M. Rodenburg, and A. M. Maiden
Opt. Express 22(10) 12513-12523 (2014)