Wang D, Zhang Y, Rong L, Ma D, Zhao J, Wang Y. Continuous-wave terahertz self-referencing digital holography based on Fresnel's mirrors.
OPTICS LETTERS 2020;
45:913-916. [PMID:
32058503 DOI:
10.1364/ol.385943]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Accepted: 01/16/2020] [Indexed: 06/10/2023]
Abstract
Continuous-wave terahertz digital holography (TDH) is a booming full-field phase-contrast imaging method validated in both in-line and Mach-Zehnder off-axis geometries. In this Letter, a self-referencing TDH approach is proposed based on the Fresnel's mirrors, by which the object wavefront is partitioned and reflected. Two beams interfere with each other to form an off-axis hologram. The proposed recording configuration is immune from a superposed twin image and has higher temporal stability than Mach-Zehnder interferometers. To evaluate the phase-contrast imaging performance, different types of samples are measured.
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