We present a novel method for in situ refractive index measurement of scattering samples using a needle device. The device employs a fiber-based reflectance refractometer and coherence-gated detection of the reflected optical signal that eliminates scattering-dependent backreflection contributions. Additionally, birefringence changes induced by fiber movement are neutralized by randomizing the ...

This paper reports a label-free biosensor combining microfluidics and optical detection based on a Fabry-Perot refractometer. The device monolithically integrates waveguides coupled to distributed Bragg mirrors and also a hydrodynamic particle injector enabling cells to enter the sensor cavity. Recent developments in sub-populations identification based on volumetric refractive index measuremen...

Experimental data were obtained for AA copolymers as resource-saving thickeners using compensatory copolymerization of KS. The refractive index the heptilacrylate (HA) ether was determined on a digital refractometer DR301-95. molar mass and density its solubility in solvents ethanol, acetone, DMF benzene also determined. We beat HA + styrene 1: 2, 1, 2: 1 mole ratio.