High-Energy Large Spot Array Measurement Method Based on Current Inversion

Fig. 3. Effect of light intensity and temperature on partial parameters. (a) Effect of light intensity on light current and shunt resistance; (b) effect of temperature on reverse saturation current and light current

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Fig. 4. Effect of each parameter on output characteristic. (a) Light current; (b) shunt resistance; (c) reverse saturation current; (d) ideality factor

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Fig. 5. Effect of light intensity on output characteristic

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Fig. 6. Light intensity distributions of the incident spots. (a) Unshaded case; (b) shaded case

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Fig. 7. Actual light intensity distribution matrixes. (a) Unshaded case; (b) shaded case

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Fig. 8. Output characteristics of $C_{15,15}$ , $C_{13,13}$ , and $C_{11,11}$

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Fig. 9. Output current of photovoltaic cells. (a) Unshaded case; (b) shaded case

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Fig. 10. Inverted light intensity distribution matrixes. (a) Unshaded case; (b) shaded case

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Fig. 11. Relative error between the inverted light intensity distribution matrix and actual light intensity distribution matrix

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Fig. 12. Light intensity distributions of the recovered spots. (a) Unshaded case; (b) shaded case

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Fig. 13. Light intensity distributions of $y = - 2 c m$ . (a) Unshaded case; (b) shaded case

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Fig. 14. Light intensity distribution and photovoltaic cells array in the shaded area. (a) Light intensity distribution; (b) photovoltaic cells array

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Table 1. Values of variables in the five-parameter model

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Table 1. Values of variables in the five-parameter model

Variable	Value
Short circuit current temperature coefficient $α_{S C}$ /（A·K^-1）	$3.04 \times 10^{- 4}$
Light current $I_{p h}$ /A	0.76
Reverse saturation current $I_{0}$ / $μ A$	0.32
Series resistance $R_{s}$ / $Ω$	0.036
Shunt resistance $R_{s h}$ / $Ω$	53.72

Table 2. Values of the four parameters
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Table 2. Values of the four parameters
Parameter Value
Light current /A 0.76 1.52 2.28 3.04 3.80
Shunt resistance / $Ω$ 53.72 26.86 17.91 13.43 10.74
Reverse saturation current / $μ A$ 0.005 0.026 0.130 0.580 2.380
Ideality factor 1.0 1.2 1.4 1.6 1.8

Table 3. Measurement errors of the spots under different situations
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Table 3. Measurement errors of the spots under different situations
Situation Average relative error Maximum relative error
Unshaded case 0.34 2.61
Shaded case 0.60 18.46

Table 4. Calculation results of total power and uniformity
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Table 4. Calculation results of total power and uniformity
Situation Total power /W Uniformity
Unshaded case 99.68 2.15
Shaded case 97.88 2.13

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Xuegui Zhu, Gengjian Liu, Huaiqing Zhang, Xinyu Cui, Zhicheng Wu, Yuan Fan. High-Energy Large Spot Array Measurement Method Based on Current Inversion[J]. Laser & Optoelectronics Progress, 2025, 62(19): 1912001

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