Improved Quadratic Normalized for Eliminating Effect of Light Source Fluctuation

Hongbo Gao; Xiefei Shi; Peng Wang; Xiaoman Shen; Jihua Yang; Limei Zeng; Weiguo Zhao

doi:10.3788/LOP240507

Laser & Optoelectronics Progress, Volume. 61, Issue 23, 2312004(2024)

Improved Quadratic Normalized for Eliminating Effect of Light Source Fluctuation

Hongbo Gao¹, Xiefei Shi^1、*, Peng Wang², Xiaoman Shen¹, Jihua Yang¹, Limei Zeng¹, and Weiguo Zhao³

Author Affiliations

¹Institute of Optics, National Institute of Measurement and Testing Technology, Chengdu 610021, Sichuan , China

²Institute of Flow, National Institute of Measurement and Testing Technology, Chengdu 610021, Sichuan , China

³College of Metrology Measurement and Instrument, China Jiliang University, Hangzhou 310000, Zhejiang , China

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Figures & Tables(9)

Fig. 1. Structure of proposed new test system

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Fig. 2. Structure and optical path of QNMD

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Fig. 3. Experimental facility

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Fig. 4. Reflex response curve of light source undulation experiment

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Fig. 5. Quadratic normalized coefficient

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Table 1. Response of standard white plate when wavelength is 550 nm

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Table 1. Response of standard white plate when wavelength is 550 nm

Detection times	Reflex response	Incident response	Reflection coefficient
1	89.259	92.275	0.9676
2	89.282	92.314
3	89.287	92.222
4	89.296	92.268
5	89.316	92.295
6	89.305	92.330
7	89.300	92.244
8	89.271	92.308
9	89.302	92.292
10	89.316	92.285

Table 2. Response of the sample when wavelength is 550 nm

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Table 2. Response of the sample when wavelength is 550 nm

Detection times	Reflex response	Incident response	Reflection coefficient
1	77.882	77.887	0.9243
2	84.303	84.293
3	77.882	77.887
4	84.303	84.293
5	77.882	77.887
6	84.303	84.293
7	77.882	77.887
8	84.303	84.293
9	77.882	77.887
10	84.303	84.293

Table 3. Comparison of measurement results
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Table 3. Comparison of measurement results
Parameter Standard value Measured value
X 84.41 84.54
Y 89.42 89.66
Z 95.51 95.84
x 0.3134 0.3131
y 0.3320 0.3320

Table 4. Comparison between the new and old methods

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Table 4. Comparison between the new and old methods

Parameter	Standard value	Old method		New method
Parameter	Standard value	Measured value	Relative error /%	Measured value	Relative error /%
X	84.41	85.54	1.34	84.84	0.51
Y	89.42	91.08	1.86	89.88	0.51
Z	95.51	96.60	1.14	96.00	0.51
x	0.3134	0.3131	0.10	0.3134	0
y	0.3320	0.3336	0.48	0.3320	0

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Hongbo Gao, Xiefei Shi, Peng Wang, Xiaoman Shen, Jihua Yang, Limei Zeng, Weiguo Zhao. Improved Quadratic Normalized for Eliminating Effect of Light Source Fluctuation[J]. Laser & Optoelectronics Progress, 2024, 61(23): 2312004

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