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Related Concept Videos

Raman Spectroscopy Instrumentation: Overview01:26

Raman Spectroscopy Instrumentation: Overview

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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...
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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.
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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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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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Optical fiber-based open source low cost portable spectrometer system.

Gatis Tunens1, Ernests Einbergs1, Katrina Laganovska1

  • 1Institute of Solid State Physics, University of Latvia, Kengaraga Str. 8, Riga LV-1063, Latvia.

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Summary
This summary is machine-generated.

A compact, Raspberry Pi-operated fiber spectrometer offers an affordable and accessible solution for basic chemistry and biology labs, enabling versatile measurements and powerful data processing in a small form factor.

Keywords:
AbsorptionFibersFluorescenceSpectroscopy

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Area of Science:

  • Spectroscopy
  • Optical Engineering
  • Laboratory Instrumentation

Background:

  • Standard spectrometers are often expensive and inaccessible for basic laboratory settings.
  • There is a need for compact, versatile, and cost-effective spectroscopic solutions.
  • Fiber-based systems offer flexibility for measurements in diverse laboratory conditions.

Purpose of the Study:

  • To develop a small, compact, and affordable fiber-based spectrometer system.
  • To leverage Raspberry Pi computing power for enhanced functionality and data processing.
  • To create a versatile instrument suitable for basic chemistry and biology applications.

Main Methods:

  • Development of a compact fiber-based spectrometer.
  • Integration with a Raspberry Pi for control and data processing.
  • Customization for fluorescence, light scattering, and absorption measurements.

Main Results:

  • A small, portable, and cost-effective spectrometer system was successfully developed.
  • The system demonstrated versatile operation modes and powerful data processing capabilities.
  • The fiber-optic design allowed for measurements in various experimental setups.

Conclusions:

  • The developed fiber-based spectrometer system provides an accessible and adaptable alternative to standard spectrometers.
  • Its compact size, affordability, and versatility make it ideal for educational and research labs.
  • The system's modular design facilitates customization for a wide range of spectroscopic applications.