Research of coherent noise suppression method based on rotational scatterer in dual-wavelength holographic microscopy

Fuxia, Cheng; Wei, Liu; Tiantai, Guo; Ming, Kong; Jiaqi, Huang; Yixiao, Niu; Suiyu, Chen

doi:10.1016/j.optcom.2023.130155

Cited by 2 publications

(2 citation statements)

References 19 publications

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“…This noise significantly degrades the image quality of amplitude and phase images reconstructed by DH. 14 One of the dominant approaches to suppressing coherent noise is to replace the coherent laser with a low-coherence light source such as a broad-spectrum light-emitting diode (LED) or a laser with a rotational scatterer. 14,15 These low-coherence light sources are limited only in one aspect of temporal coherence and spatial coherence, rather than both, as is the case with incoherent light sources such as fluorescence and natural light.…”

Section: Introductionmentioning

confidence: 99%

“…14 One of the dominant approaches to suppressing coherent noise is to replace the coherent laser with a low-coherence light source such as a broad-spectrum light-emitting diode (LED) or a laser with a rotational scatterer. 14,15 These low-coherence light sources are limited only in one aspect of temporal coherence and spatial coherence, rather than both, as is the case with incoherent light sources such as fluorescence and natural light. The coherence lengths of low-coherence sources are about tens of micrometers, which prevents coherent superposition between the interfering beams, the object beam, and the reference beam, thus achieving the suppression of speckle noise and improving the imaging quality of DH.…”

Section: Introductionmentioning

confidence: 99%

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Full-field snapshot phase-shifting low-coherence digital holography

Wang,

Zhang,

et al. 2024

Opt. Eng.

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To address the difficulty of balancing dynamic performance and spatial bandwidth in existing low-coherence digital holography (DH), the parallel phase-shifting method used in coherent and incoherent DH is introduced into low-coherence DH. A lightemitting diode (LED)-based reflective optical configuration of the proposed phaseshifting low-coherence DH is designed. The speckle noise, zero-order diffraction, and twin image noise are suppressed by the low-coherence LED source and the four-step phase-shifting method. Simulation and optical experimental results demonstrate that the proposed method can simultaneously achieve high-precision, highresolution, full-field, single-shot amplitude and phase imaging. It is expected to be applied to many fields such as flow cytometry imaging and micro-electromechanical system detection.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Full-field snapshot phase-shifting low-coherence digital holography

Wang,

Zhang,

et al. 2024

Opt. Eng.

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Snapshot dual-wavelength digital holography with LED and laser hybrid illumination

Wang,

Xi,

Zhang

et al. 2024

Opt. Express

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To address the problem of the time-sharing recording of dual-wavelength low-coherence holograms while avoiding the use of customized achromatic optical elements, a snapshot dual-wavelength digital holography with LED and laser hybrid illumination is proposed. In this method, the parallel phase-shifting method is firstly employed to suppress zero-order and twin-image noise, and to record a LED hologram with low speckle noise and full field of view. Secondly, another laser hologram with a different center wavelength affected by speckle noise is recorded simultaneously using the spatial multiplexing technique. Finally, dual-wavelength wrapped phase images are reconstructed from a spatial multiplexing hologram, and then are combined to achieve low-noise phase unwrapping utilizing the iterative algorithm. Simulation and optical experiments on a reflective step with a depth of 1.38µm demonstrate that the proposed method can achieve single-shot and large-range height measurements while maintaining low-noise and full-field imaging.

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Research of coherent noise suppression method based on rotational scatterer in dual-wavelength holographic microscopy

Cited by 2 publications

References 19 publications

Full-field snapshot phase-shifting low-coherence digital holography

Full-field snapshot phase-shifting low-coherence digital holography

Snapshot dual-wavelength digital holography with LED and laser hybrid illumination

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