Design of an optoelectronic refractometer having an adjustable range of refractive index measurement

Shukla, R. K.; Srivastava, Atul; Srivastava, Anchal; Srivastava, Manoj; Dixit, Shobhna; Misra, Deepika

doi:10.1016/j.optlastec.2007.10.012

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Cited by 6 publications

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“…The refractive index of a medium derives from the reflectance profile at an interface between the sample and a front reference medium, which is typically a transparent prism [1,2]. When the sample is transparent, the refractive index is a real number that can be determined from just one out of several features of the reflectance profile, such as the critical angle of total internal reflection (θ c ) [3][4][5] or the Brewster angle (θ B ) [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Two Prism Critical Angle Refractometry with Attenuating Media

2022

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We present a concept that enables the determination of the complex refractive index of attenuating media from two critical angles, measured sequentially at two interfaces between a single sample and two different prisms. The proposed method is general in that it applies with s and p polarisation states, thus it is suited for the characterisation of isotropic as well as anisotropic media. Uncertainty analysis indicates that relative error in the determination of the real (imaginary) index can be less than 10−4 (in the order of 10%), respectively.

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