Chinese Optics Letters, 2017, 15 (4): 042902, Published Online: Jul. 25, 2018
Self-calibrated global rainbow refractometry: a dual-wavelength approach Download: 963次
290.5820 Scattering measurements 120.4820 Optical systems 120.6780 Temperature 290.5820 Scattering measurements 290.3030 Index measurements
Abstract
Calibration of the relationship between the scattering angle and the CCD pixel is a key part of achieving accurate measurements of rainbow refractometry. A novel self-calibrated global rainbow refractometry system based on illumination by two lasers of different wavelengths is proposed. The angular calibration and refractive index measurement of two wavelengths can be completed simultaneously without extra measurement devices. The numerical and experimental results show the feasibility and high precision of the self-calibration method, which enables the rainbow refractometry to be implemented in a more powerful and convenient way. The self-calibrated rainbow system is successfully applied to measure the refractive indices of ethanol-water solutions with volume concentrations of 10% to 60%.
Xuecheng Wu, Haoyu Jiang, Kailin Cao, Yingchun Wu, Can Li, Gérard Gréhan, Sawitree Saengkaew, Kefa Cen. Self-calibrated global rainbow refractometry: a dual-wavelength approach[J]. Chinese Optics Letters, 2017, 15(4): 042902.