Abstract
A reflection mode digital holographic microscope with light emitting diode (LED) illumination and off-axis interferometry is proposed. The setup is comprised of a Linnik interferometer and a grating-based imaging unit. Both object and reference waves travel coaxially and are split into multiple diffraction orders in the Fourier plane by the grating. The zeroth and first orders are filtered by a polarizing array to select orthogonally polarized object waves and reference waves. Subsequently, the object and reference waves are combined again in the output plane of the system, and then the hologram with uniform contrast over the entire field of view can be acquired with the aid of a polarizer. The one-shot nature in the off-axis configuration enables an interferometric recording time on a millisecond scale. The validity of the proposed setup is illustrated by imaging nanostructured substrates, and the experimental results demonstrate that the phase noise is reduced drastically by an order of 68% when compared to a He–Ne laser-based result.
© 2013 Optical Society of America
Full Article | PDF ArticleMore Like This
Rongli Guo, Baoli Yao, Peng Gao, Junwei Min, Jun Han, Xun Yu, Ming Lei, Shaohui Yan, Yanlong Yang, Dan Dan, and Tong Ye
Appl. Opt. 52(15) 3484-3489 (2013)
Tomáš Slabý, Pavel Kolman, Zbyněk Dostál, Martin Antoš, Martin Lošťák, and Radim Chmelík
Opt. Express 21(12) 14747-14762 (2013)
Junwei Min, Baoli Yao, Peng Gao, Rongli Guo, Baiheng Ma, Juanjuan Zheng, Ming Lei, Shaohui Yan, Dan Dan, Tao Duan, Yanlong Yang, and Tong Ye
Appl. Opt. 51(2) 191-196 (2012)