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Related Concept Videos

UV–Vis Spectrometers01:14

UV–Vis Spectrometers

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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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IR Spectrometers01:25

IR Spectrometers

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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: Introduction01:16

Spectrophotometry: Introduction

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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.
The essential components of a spectrophotometer include a source of electromagnetic radiation, a slot for placing a material to be analyzed, and a...
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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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Atomic Absorption Spectroscopy: Instrumentation01:22

Atomic Absorption Spectroscopy: Instrumentation

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An atomic absorption spectrophotometer (AAS) comprises several components: a radiation source, an atomizer, a monochromator, and a detector. The radiation source can be a hollow-cathode lamp (HCL) or an electrodeless-discharge lamp (EDL), both of which provide a narrow emission line of the required wavelength. However, some instruments use continuum sources and high-resolution monochromators to achieve a narrow range of radiation.
The atomizer used in AAS can be either a flame atomizer or an...
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Atomic Absorption Spectroscopy: Radiation and Light Sources01:13

Atomic Absorption Spectroscopy: Radiation and Light Sources

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Atomic absorption spectroscopy (AAS) relies on the Beer-Lambert law, which requires that the radiation source emits a narrow range of wavelengths to match the absorption characteristics of the analyte atom. The primary criteria for choosing an appropriate radiation source in AAS is to provide a precise and intense emission at specific wavelengths that will allow accurate detection of the analyte.
Two common narrow-range 'line' sources used in AAS are hollow-cathode lamps (HCLs) and...
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Diffuse Optical Spectroscopy for the Quantitative Assessment of Acute Ionizing Radiation Induced Skin Toxicity Using a Mouse Model
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Wearable Spectroradiometer for Dosimetry.

Maximilian J Chmielinski1, Martin A Cohen1, Michael G Yost1

  • 1Department of Environmental and Occupational Health Sciences, School of Public Health, University of Washington, Seattle, WA 98105, USA.

Sensors (Basel, Switzerland)
|November 26, 2022
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Summary
This summary is machine-generated.

Researchers developed a wearable spectroradiometer system to accurately measure UV and visible radiation, overcoming spectral mismatch issues common in multi-spectra environments like cannabis farms.

Keywords:
dosimetryenvironmental monitoringsensor applications

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Area of Science:

  • Optics and Photonics
  • Occupational Health and Safety
  • Environmental Science

Background:

  • Wearable dosimeters struggle with spectral mismatch when measuring broadband UV and visible radiation from diverse sources.
  • This issue is prevalent in environments like cannabis farms, impacting accurate worker exposure assessments.
  • Existing spectroradiometers are not designed for wearable dosimetry, creating a research gap.

Purpose of the Study:

  • To develop and validate a wearable microcontroller system for deploying a spectroradiometer.
  • To enable accurate measurement of UV and visible radiation (300-700 nm) in real-world, multi-spectra environments.
  • To address the limitations of current wearable dosimeters in spectral accuracy.

Main Methods:

  • Developed a microcontroller platform to enable wearable deployment of the Ocean Insight Flame-S Spectroradiometer.
  • Validated the platform by comparing measurements with the spectroradiometer controlled via PC.
  • Utilized Mann-Whitney U-Tests to compare total spectral power (TSP) measurements under both control methods.
  • Assessed per-pixel agreement and platform stability.

Main Results:

  • No significant difference in TSP measurements was found between the wearable platform and PC control.
  • The validation confirmed equivalent measurement accuracy under both control schemas.
  • The platform demonstrated stability for wavelength-resolved UV and visible radiation measurements.

Conclusions:

  • The developed wearable spectroradiometer system effectively overcomes spectral mismatch limitations.
  • This technology provides a viable solution for accurate UV and visible radiation exposure monitoring in complex environments.
  • The system closes the research gap for deployable, wearable spectroradiometers in occupational health studies.