Abstract
We present an external interferometric setup that is able to simultaneously acquire three wavelengths of the same sample instance without scanning or multiple exposures. This setup projects onto the monochrome digital camera three off-axis holograms with rotated fringe orientations, each from a different wavelength channel, without overlap in the spatial-frequency domain, and thus allows the full reconstruction of the three complex wavefronts from the three wavelength channels. We use this new setup for three-wavelength phase unwrapping, allowing phase imaging of thicker objects than possible with a single wavelength, but without the increased level of noise. We demonstrate the proposed technique for micro-channel profiling and label-free cell imaging.
© 2018 Optical Society of America
Full Article | PDF ArticleMore Like This
Nir A. Turko and Natan T. Shaked
Opt. Lett. 42(1) 73-76 (2017)
Rongli Guo, Weiguang Zhang, Rong Liu, Cunli Duan, and Fan Wang
Opt. Lett. 43(14) 3449-3452 (2018)
Lauren Wolbromsky, Nir A. Turko, and Natan T. Shaked
Opt. Lett. 43(9) 2046-2049 (2018)