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Related Concept Videos

Spectrophotometry: Introduction01:16

Spectrophotometry: Introduction

Spectrophotometry is the quantitative measurement of the absorption, reflection, diffraction, or transmission of electromagnetic radiation through a material as a function of the intensity and wavelength of the radiation. A spectrophotometer is a device used to measure the change in the radiation intensity caused by its interaction with the material.
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There are two main infrared (IR) spectrophotometers: dispersive IR spectrometers and Fourier transform infrared (FTIR) spectrometers. In a dispersive IR spectrometer, a beam of infrared radiation produced by a hot wire is divided into two parallel equal-intensity beams using mirrors. One beam passes through the sample, while another is a reference beam. The beams then move through the monochromator, which separates the radiations into a continuous spectrum of different frequencies. The...
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Synthesis and Operation of Fluorescent-core Microcavities for Refractometric Sensing
08:12

Synthesis and Operation of Fluorescent-core Microcavities for Refractometric Sensing

Published on: March 13, 2013

Spectroscopic method for measuring refractive index.

Milan Milosevic1, Sean W King

  • 1MeV Technologies, Westport, Connecticut 06880, USA. milan@mevtechnologies.com

Applied Optics
|July 12, 2013
PubMed
Summary
This summary is machine-generated.

A novel method provides fast, accurate refractive index measurements using interference fringe analysis. This technique allows for precise determination of optical properties across a wide spectral range.

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Area of Science:

  • Optics and Photonics
  • Materials Science

Background:

  • Accurate refractive index measurement is crucial for material characterization and optical device design.
  • Existing methods can be time-consuming or lack precision across broad spectral ranges.

Purpose of the Study:

  • To introduce a routine, precise, fast, and accurate method for measuring refractive index.
  • To enable the generation of dense datasets of refractive index values over the entire spectral range of interest.

Main Methods:

  • Analysis of interference fringes, specifically the positions of maxima and/or minima.
  • Precise measurement of sample thickness.
  • Calculation of refractive index based on fringe data and sample thickness.

Main Results:

  • Demonstration of a method for routine and precise refractive index measurements.
  • Achieved high accuracy and speed in refractive index determination.
  • Capability to obtain extremely dense datasets of refractive index values.

Conclusions:

  • The described method offers a significant advancement for optical metrology.
  • It facilitates efficient and accurate characterization of material optical properties.
  • Enables comprehensive spectral analysis of refractive index.