Abstract
In this paper, absolute-phase total internal reflection heterodyne interferometry is proposed for measuring a full-field refractive index. In this method, an optical configuration of prism-based total internal reflection is used. If an electro-optical modulator is driven by a sawtooth wave with an amplitude lower than the half-wave voltage, heterodyne interferometric signals can be generated in segment mode. After a camera has captured these discrete interferometric signals, the optimum signal segment can be analyzed; a specific time segment can be inserted so that the interferometric signals of every pixel can be fitted as a continuous sinusoidal wave; a least-squares sine-fitting algorithm can extract the initial phase. Finally, the absolute phase can be calculated by subtraction of the characteristic phase, and the full-field refractive index can be obtained. To prove the feasibility of the proposed method, the different combinations of specimens were measured, including air, water, glycerol, and castor oil. The experimental data correspond well with the theoretical values. This method features simple operation, low influence of environmental disturbance, rapid measurement, and high resolution.
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References
Y.M. Nimdeo, Y.M. Joshi, K. Muralidhar, Appl. Clay Sci. 123, 272 (2016)
P.Y. Liu, L.K. Chin, W. Ser, H.F. Chen, C.M. Hsieh, C.H. Lee, K.B. Sung, T.C. Ayi, P.H. Yap, B. Liedberg, K. Wang, T. Bourouina, Y. Leprince-Wang, Lab Chip 16, 634 (2016)
B.H. Lee, N.H. Shin, K. Jeong, M.J. Park, B.G. Kim, J.H. Yoo, D.G. Kim, K.H. Yun, K.S. Lee, K.H. Kim, D.K. Kim, S.H. Park, J. Opt. Soc. Korea 13, 468 (2009)
N.H. Fontaine, M. Young, Appl. Opt. 38, 6836 (1999)
W.J. Choi, D.I. Jeon, S.G. Ahn, J.H. Yoon, S. Kim, B.H. Lee, Opt. Express 18, 23285 (2010)
H.G. Tompkins, A. Eugene, Handbook of ellipsometry (William Andrew Publishing, Springer, Irene, 2005)
Y.S. Lin, M.H. Chiu, Appl. Mech. Mater. 870, 9 (2017)
Z.C. Jian, P.J. Hsieh, H.C. Hsieh, H.W. Chen, D.C. Su, Opt. Commun. 268, 23 (2006)
J.Y. Lee, T.K. Chou, H.C. Shih, Opt. Lett. 33, 434 (2008)
C.L. Wong, H.P. Ho, T.T. Yu, Y.K. Suen, W.W. Chow, S.Y. Wu, W.C. Law, W. Yuan, W.J. Li, S.K. Kong, C. Lin, Appl. Opt. 46, 2325 (2007)
J. Zhang, J. Di, Y. Li, T. Xi, J. Zhao, Opt. Express 23, 27328 (2015)
M. Akiba, K.P. Chen, N. Tanno, Opt. Lett. 28, 816 (2003)
IEEE, “Standard for terminology and test methods for Analog to Digital converters,” IEEE Std. 1241-2000, 25-29 (2000)
Y.L. Chen, D.C. Su, Appl. Opt. 47, 6518 (2008)
Z.C. Jian, Y.L. Chen, H.C. Hsieh, P.J. Hsieh, D.C. Su, Opt. Eng. 46, 115604-1 (2007)
M.H. Chiu, J.Y. Lee, D.C. Su, Appl. Opt. 38, 4047 (1999)
Acknowledgements
The authors would like to thank the National Science Council of the Republic of China, Taiwan for financially supporting this research under Contract No. MOST 107-2221-E-035-068-MY2.
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Chen, KH., Wang, YH., Chen, JH. et al. Full-field refractive index measurement using absolute-phase total internal reflection heterodyne interferometry. Appl. Phys. B 126, 109 (2020). https://doi.org/10.1007/s00340-020-07462-z
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DOI: https://doi.org/10.1007/s00340-020-07462-z