Influence of sodium silicate on the refractive index of seawater using a CMOS module based refractometer

Shiyu CHEN; Cong ZHANG; Xiaoxue BAI; Muzi ZHANG; Juan SU

doi:10.3788/IRLA20250078

Infrared and Laser Engineering, Volume. 54, Issue 5, 20250078(2025)

Influence of sodium silicate on the refractive index of seawater using a CMOS module based refractometer

Shiyu CHEN, Cong ZHANG, Xiaoxue BAI, Muzi ZHANG, and Juan SU

Author Affiliations

Institute of Marine Science and Technology, Shandong University, Qingdao 266237, China

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Figures & Tables(5)

$Refractive index measurement principle diagram based on smartphone camera module$

Fig. 1. Refractive index measurement principle diagram based on smartphone camera module

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$The relationship between the center position of the light spot (along the x-axis) and the refractive index of standard seawater$

Fig. 2. The relationship between the center position of the light spot (along the x-axis) and the refractive index of standard seawater

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Fig. 3. The conductivity measurement results of standard seawater with different silicate concentrations by DW1526

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$The refractive index of seawater (35 PSU) varies with the concentration of sodium silicate$

Fig. 4. The refractive index of seawater (35 PSU) varies with the concentration of sodium silicate

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Table 1. The main performance parameters of the Samsung HM2
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Table 1. The main performance parameters of the Samsung HM2
Parameter Value
Resolution/pixel 0.3
Pixel size/μm 0.7
Target surface size/mm 8.4×6.3
Measurement points/pixel 12000

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Shiyu CHEN, Cong ZHANG, Xiaoxue BAI, Muzi ZHANG, Juan SU. Influence of sodium silicate on the refractive index of seawater using a CMOS module based refractometer[J]. Infrared and Laser Engineering, 2025, 54(5): 20250078

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