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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...
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...
Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

Inductively coupled plasma (ICP) is the common plasma source used in atomic emission spectroscopy (AES), a technique that detects and analyzes various elements in a sample. This method is often called inductively coupled plasma atomic emission spectroscopy (ICP-AES).
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Mass Analyzers: Overview01:13

Mass Analyzers: Overview

The mass analyzer is a crucial component of the mass spectrometer. In the ionization chamber, the vaporized sample is bombarded with a high-energy electron beam to generate a radical cation and further fragment into neutral molecules, radicals, and cations. A series of negatively charged accelerator plates accelerate the cations into the mass analyzer. The mass analyzer separates ions according to their mass-to-charge (m/z) ratios and then directs them to the detector. The common types of mass...

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Related Experiment Video

Updated: May 13, 2026

Rejection of Fluorescence Background in Resonance and Spontaneous Raman Microspectroscopy
15:04

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Published on: May 18, 2011

Filters with random transmittance for improving resolution in filter-array-based spectrometers.

J Oliver1, Woong-Bi Lee, Heung-No Lee

  • 1School of Information and Communications, Gwangju Institute of Science and Technology, South Korea.

Optics Express
|March 14, 2013
PubMed
Summary
This summary is machine-generated.

This study introduces random transmittance filters to significantly enhance miniature spectrometer resolution. The novel method achieves a 7-fold improvement, advancing optical sensing capabilities.

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Area of Science:

  • Optics and Photonics
  • Spectroscopy
  • Optical Engineering

Background:

  • Miniature spectrometers often face limitations in spectral resolution.
  • Existing methods for enhancing spectrometer resolution can be complex or costly.

Purpose of the Study:

  • To introduce a novel method for improving the resolution of miniature spectrometers.
  • To propose a design approach for specialized filters using optical thin-film technology.

Main Methods:

  • Utilizing filters with random transmittance to capture fine spectral details.
  • Integrating these filters with a signal processing algorithm.
  • Employing optical thin-film technology for filter fabrication.

Main Results:

  • Demonstrated a 7-fold improvement in spectral resolution compared to previous work.
  • The random transmittance filters effectively sense fine details in the input spectrum.
  • Successful design and application of filters using optical thin-film technology.

Conclusions:

  • The proposed method offers a significant enhancement in miniature spectrometer resolution.
  • Random transmittance filters combined with signal processing provide a powerful approach for spectral analysis.
  • Optical thin-film technology enables practical fabrication of these advanced filters.