Talbot Effect from Spherical Wave Illuminating on Two-Dimensional Grating

Fig. 2. Results of Talbot imaging. (a) Plane wave; (b) $z_{1} \approx 75.9 c m$ ； (c) $z_{1} \approx 101.1 c m$ ； (d) $z_{1} \approx 113.8 c m$ ； (e) $z_{1} \approx 151.7 c m$ ； (f) $z_{1} \approx 177.0 c m$

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Fig. 3. Fractional Talbot images $(z_{0} = 2 z_{T} \approx 101.1 c m)$ . (a) $z_{1} \approx 14.5 c m$ ； (b) $z_{1} \approx 17.9 c m$ ； (c) $z_{_{1}} \approx 20.2 c m$ ； (d) $z_{1} \approx 60.9 c m$

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Fig. 4. z₁changes with z₀

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Table 1. Recording table of imaging distance z₁

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Table 1. Recording table of imaging distance z₁

z₀/cm	Theoretical value z₁/cm	Experimental value z₁/cm	Magnification M
151.7	75.9	74.9	1.500
131.7	82.2	80.7	1.625
111.3	92.7	90.3	1.833
101.1	101.1	98.7	2.000
91.0	113.8	111.6	2.250
80.9	134.9	132.9	2.667
75.9	151.7	141.7	3.000
70.8	177.0	178.1	3.500
60.7	303.4	312.0	6.000
55.6	556.3	557.4	11.000

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Dongxu Yin, Sumei Zhou, Yimunan Xie. Talbot Effect from Spherical Wave Illuminating on Two-Dimensional Grating[J]. Laser & Optoelectronics Progress, 2021, 58(11): 1105002

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