Polschikova Olga, Machikhin Alexander, Gorevoy Alexey, Stoykova Elena
J Opt Soc Am A Opt Image Sci Vis. 2022 Feb 1;39(2):A79-A85. doi: 10.1364/JOSAA.444375.
We report on wavelength-multiplexed digital holographic imaging based on simultaneous Bragg diffraction of wideband light by several ultrasound waves of different frequencies in crystalline media. This technique is easy to implement, avoids spectral scanning, and is applicable in various digital holography schemes. It also enables single-shot acquisition of a few spectral fringe patterns by a single monochrome sensor and wavelength demultiplexing of the resulting interferogram. We have assembled a Mach-Zehnder interferometer with an acousto-optical tunable filter operating in the multifrequency mode and have validated the proposed technique by dual-, three-, and four-wavelength quantitative phase imaging of the test samples.
我们报道了基于宽带光在晶体介质中被几种不同频率的超声波同时进行布拉格衍射的波长复用数字全息成像技术。该技术易于实现，避免了光谱扫描，适用于各种数字全息方案。它还能通过单个单色传感器单次采集少数光谱条纹图案，并对所得干涉图进行波长解复用。我们组装了一个带有在多频模式下运行的声光可调滤波器的马赫-曾德尔干涉仪，并通过对测试样品进行双波长、三波长和四波长定量相位成像验证了所提出的技术。
