Sensitivity Calculation for the Dual Phase Grating Interferometer by Lau Condition

Jun YANG; Jianheng HUANG; Yuzheng SHAN; Yaohu LEI; Fangke ZONG; Jinchuan GUO

doi:10.3788/gzxb20235201.0105001

Acta Photonica Sinica, Volume. 52, Issue 1, 0105001(2023)

Sensitivity Calculation for the Dual Phase Grating Interferometer by Lau Condition

Jun YANG, Jianheng HUANG, Yuzheng SHAN, Yaohu LEI, Fangke ZONG, and Jinchuan GUO^*

Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province，College of Physics and Optoelectronic Engineering，Shenzhen University，Shenzhen 518060，China

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Fig. 1. Illustration of the Lau condition of the dual phase grating interferometer

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Fig. 2. The simulation fringe formed by the point source G₀ on the optics axis and the point source G_0' off the optics axis

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Fig. 3. Illustration of the Talbot-Lau interferometer

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Fig. 4. Illustration of the dual phase grating interferometer

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Fig. 5. Illustration of an object between the two phase gratings

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Table 1. The simulation parameters of the dual phase grating interferometer
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Table 1. The simulation parameters of the dual phase grating interferometer
$p_{1}$ / $μ m$ $p_{2}$ / $μ m$ $z_{1}$ / $c m$ $z_{2}$ / $c m$ $z_{3}$ / $c m$ Voltage/kVp $x_{0}$ / $μ m$ Fringe shift/ $μ m$
Parameters in Fig. 2（a） 2 2.1 14.91 2.22 52.92 40 5 -16.9
Parameters in Fig. 2（b） 2.1 2 38.32 2.01 151.21 40 10 13.8

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Jun YANG, Jianheng HUANG, Yuzheng SHAN, Yaohu LEI, Fangke ZONG, Jinchuan GUO. Sensitivity Calculation for the Dual Phase Grating Interferometer by Lau Condition[J]. Acta Photonica Sinica, 2023, 52(1): 0105001

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