Phase imaging for photorefractive holographic gratings with dual-wavelength digital holography

Gao, Zhirui; Jiang, Zhuqing; Wang, Yujia; Wu, Jiangtao; Wang, Yunxin

doi:10.1117/12.999819

Cited by 1 publication

(1 citation statement)

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“…If the optical path difference is greater than the equivalent wavelength, the phase unwrapping process will be simplified by dualwavelength digital holographic interferometry. The noise immunity and the scope of phase unwrapping algorithms will be improved and expanded, respectively [13][14][15]. C. J. Mann obtained the measurement results of the surface height over several microns of range by three-wavelength digital 2 International Journal of Optics holography [16].…”

Section: Introductionmentioning

confidence: 99%

Study on Quantitative Phase Imaging by Dual-Wavelength Digital Holography Microscopy

Lin

Dai

et al. 2018

International Journal of Optics

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A dual-wavelength digital holographic microscopy with premagnification is proposed to obtain the object surface measurements over the large gradient. The quantitative phase images of specimens are captured in high precision by the processing of filtering and phase compensation. The phase images are acquired without phase unwrapping, which is necessary in traditional digital holographic microscopy; thereby the proposed system can greatly increase the speed of reconstruction. The results of numerical simulation and optical experiments demonstrated that the reconstructed speed increased by 37.9 times, and the relative error of measurement is 4% compared with the traditional holographic microscopy system. It means that the proposed system can directly acquire the higher quality quantitative phase distribution for specimens.

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Section: Introductionmentioning

confidence: 99%