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Related Concept Videos

IR Spectrometers01:25

IR Spectrometers

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...
Raman Spectroscopy Instrumentation: Overview01:26

Raman Spectroscopy Instrumentation: Overview

A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
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.
The essential components of a spectrophotometer include a source of electromagnetic radiation, a slot for placing a material to be analyzed, and a...
UV–Vis Spectrometers01:14

UV–Vis Spectrometers

The absorbance of UV and visible (UV–visible) radiations is measured using a UV–visible spectrophotometer. Deuterium lamps, which emit UV radiation, and tungsten lamps, which produce radiation in the visible region, are used as light sources in UV–visible spectrophotometers. A monochromator or prism is used for diffraction grating, i.e., to split the incoming radiation into different wavelengths. A system of slits is used to focus the desired wavelength on the sample cell. Samples for...

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Related Experiment Video

Updated: Jun 16, 2026

Fabrication of a Low-Cost, Fiber-Coupled, and Air-Spaced Fabry-Pérot Etalon
07:22

Fabrication of a Low-Cost, Fiber-Coupled, and Air-Spaced Fabry-Pérot Etalon

Published on: February 3, 2023

Refractometer associated with the fabry-perot spectrometer.

J M Gagné, M Giroux, J P Saint-Dizier

    Applied Optics
    |February 4, 2010
    PubMed
    Summary
    This summary is machine-generated.

    A novel refractometer offers superior precision for calibrating high-resolution spectrometers. This advanced optical instrument achieves measurement accuracy significantly higher than existing technologies.

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    Area of Science:

    • Optical Physics
    • Spectroscopy
    • Metrology

    Background:

    • High-resolution spectrometers require precise calibration for accurate measurements.
    • Existing calibration methods may lack the necessary precision for advanced spectroscopic applications.
    • Fabry-Perot spectrometers are widely used in various scientific fields.

    Purpose of the Study:

    • To describe the principles, realization, and characteristics of a new refractometer.
    • To establish this refractometer as a reference instrument for calibrating high-resolution spectrometers.
    • To demonstrate the enhanced precision of the developed refractometer.

    Main Methods:

    • Development and construction of a specialized refractometer.
    • Utilizing the refractometer as a reference standard for spectrometer calibration.
    • Characterization of the refractometer's performance and measurement precision.

    Main Results:

    • The developed refractometer operates based on established optical principles.
    • The instrument was successfully realized and its characteristics were thoroughly evaluated.
    • Measurements using this refractometer demonstrated precision approximately one order of magnitude greater than other instruments.

    Conclusions:

    • The novel refractometer serves as a highly precise reference instrument.
    • It significantly improves the accuracy of measurements for scanning high-resolution spectrometers.
    • This advancement has implications for various fields relying on precise spectroscopic data.