Non-interence Phase Retrieval Algorithm with Two Wavelength Illumination

Hong, 程鸿 Cheng; Yaoli, 高要利 Gao; Shan-shan, 徐姗姗 Xu; Huilong, 邓会龙 Deng; Sui, 韦穗 Wei

doi:10.3788/gzxb20184704.0407002

Cited by 3 publications

(10 citation statements)

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“…Figures 9(a) and 9(b) show the phase results obtained by using the method proposed in Ref. 16. Figures 9(c)–9(e) represent the phase results without noise reduction at wavelengths of 450, 532, and 632 nm, respectively, and Figs.…”

Section: Dual-microscope System and Experimental Resultsmentioning

confidence: 99%

“…Experimental results: (a), (b) phase results obtained using the method in Ref. 16; (c)–(e) phase results without noise reduction at wavelengths of 450, 532, and 632 nm, respectively; (f)–(h) phase results after Gaussian filtering of Figs. 7(b)–7(d); (i)–(k) phase results from the algorithm proposed in this article.…”

Section: Dual-microscope System and Experimental Resultsmentioning

confidence: 99%

“…To further illustrate the antinoise ability of the proposed method, we compared the change of RMSE values of the methods in Ref. 16 and this paper when the noise level changes. The result is shown in Fig.…”

Section: Simulation Experimentsmentioning

confidence: 99%

“…We used the dual-wavelength phase solution method in Ref. 16 to solve for the phase, the obtained wavelength is 450 nm, 532 nm the corresponding phase result, the 3D height result and the height result of the marked line at the same position as Fig. 14(g) are shown in Fig.…”

Section: Experimental Measurementsmentioning

confidence: 99%

“…This approach had a faster iterative convergence speed and a better conjugate image removal effect than previous schemes, but the influence of noise on the final result could not be effectively removed, and its applicability was limited. Cheng Hong of Anhui University introduced the concept of a synthetic wavelength in dual-wavelength interferometry to the phase retrieval algorithm based on the TIE, 16 which extended the limitations of the TIE and improved the accuracy of the phase solution, but the phase retrieval results were not ideal under a high level of noise.…”

Section: Introductionmentioning

confidence: 99%

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Binocular phase retrieval based on the transport of intensity equation under multiwavelength illumination

Chen

Zhang

et al. 2022

Opt. Eng.

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In view of the limitation that the transport of intensity equation method can only be used at a single wavelength, we propose a binocular phase retrieval algorithm based on multiwavelength illumination. First, we solve for the corresponding single-phase results at different wavelengths and then calculate the surface height of the object by combining the obtained synthetic wavelengths and synthetic phases, in order to reconstruct the initial phase results at different wavelengths. To solve the problem of amplification of traditional noise and surface profile noise in the phase diagram in the phase synthesis step, we introduce a step-by-step noise reduction method that can reduce the noise in the initial phase results to the level for a single wavelength and finally obtain the corresponding high-precision phase results at different wavelengths. The intensity images collected by the proposed dual-microscope system verify the correctness and effectiveness of the algorithm.

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Section: Dual-microscope System and Experimental Resultsmentioning

confidence: 99%

Section: Dual-microscope System and Experimental Resultsmentioning

confidence: 99%

Section: Simulation Experimentsmentioning

confidence: 99%

Section: Experimental Measurementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Binocular phase retrieval based on the transport of intensity equation under multiwavelength illumination

Chen

Zhang

et al. 2022

Opt. Eng.

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Transport of intensity equation method based on edge detection and duty ratio fusion

Cheng¹,

Wang²,

Ye³

et al. 2020

J. Opt.

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The non-interferometric phase recovery method which is based on the transport of intensity equation is an important phase acquisition technique in microscopy imaging. In the actual operational process of this technology, at least three intensity images are needed to solve the equation. In the image acquisition process, the selection of the focused image is very important, but it is usually determined by subjective methods, thus causing inaccurate positioning of the infocus, which further affects the precision of phase recovery result. A phase recovery algorithm based on edge detection and duty ratio is proposed. Firstly, a series of 'subjectively determined focused images' collected by the microscope are edge-extracted to obtain corresponding edge information points. Then the real in-focus position is found by calculating the duty ratio, and the corresponding defocused images are selected according to the position of the focused image. Finally, the high-precision phase recovery result is obtained by using these images of the accurate position to solve the equation. The algorithm does not require complex operations such as hardware modifications and can be applied to both discrete and continuous sample distributions. The experimental results effectively prove that the algorithm can accurately find the in-focus position, which improves the accuracy of phase recovery compared with the traditional method that is subjectively determined in-focus image position.

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High accuracy phase retrieval algorithm based on the transport of intensity equation under multi-wavelength

程¹,

Zhang

et al. 2023

Conference on Infrared, Millimeter, Terahertz Waves and Applications (IMT2022)

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A high-precision phase retrieval algorithm based on the transport of intensity equation for multi wavelength illumination is proposed. First of all, the traditional transport of intensity equation method is used to obtain the phase of a single wavelength, and the initial phase of different wavelengths is calculated according to the corresponding phase relationship between different wavelengths. Secondly, through the wavelength phase synthesis module, the phase of the object under multiple wavelengths is obtained. For the noise amplification problem introduced in the phase synthesis step, the phase unwrapping module is used to eliminate the noise level in the initial phase result and gradually reduce it to the noise level of two synthetic short wavelengths. Finally, the high-precision phase retrieval result is obtained. The experimental results verify the correctness and effectiveness of the proposed method.

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Non-interence Phase Retrieval Algorithm with Two Wavelength Illumination

Cited by 3 publications

References 0 publications

Binocular phase retrieval based on the transport of intensity equation under multiwavelength illumination

Binocular phase retrieval based on the transport of intensity equation under multiwavelength illumination

Transport of intensity equation method based on edge detection and duty ratio fusion

High accuracy phase retrieval algorithm based on the transport of intensity equation under multi-wavelength

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