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Related Concept Videos

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...
Atomic Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

The instrumentation of atomic emission spectrometry (AES) involves various components, including atomization devices that convert samples into gas-phase atoms and ions. There are two main types of atomization devices: continuous and discrete atomizers.  Continuous atomizers, like plasmas and flames, introduce samples in a constant stream, while discrete atomizers inject individual samples using syringes or autosamplers. The most common discrete atomizer is the electrothermal atomizer.
Emission Spectra02:39

Emission Spectra

When solids, liquids, or condensed gases are heated sufficiently, they radiate some of the excess energy as light. Photons produced in this manner have a range of energies, and thereby produce a continuous spectrum in which an unbroken series of wavelengths is present.
Atomic Absorption Spectroscopy: Radiation and Light Sources01:13

Atomic Absorption Spectroscopy: Radiation and Light Sources

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.
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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).
There are three main types of inductively coupled plasma atomic emission spectroscopy  (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used.
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...

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Related Experiment Video

Updated: Jun 17, 2026

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

Rejection of Fluorescence Background in Resonance and Spontaneous Raman Microspectroscopy

Published on: May 18, 2011

Stray light in czerny-turner and ebert spectrometers.

J K Pribram, C M Penchina

    Applied Optics
    |January 14, 2010
    PubMed
    Summary

    Stray light in spectrometers can be reduced by using finely ruled gratings. This study investigates multiple dispersions in Czerny-Turner and Ebert designs, offering solutions for cleaner spectral data.

    Area of Science:

    • Spectroscopy
    • Optical Engineering

    Background:

    • Spectrometers can suffer from stray light caused by undesired multiple dispersions.
    • This phenomenon affects Czerny-Turner and Ebert grating spectrometer designs.

    Purpose of the Study:

    • Investigate stray light from multiple dispersions in spectrometers.
    • Determine methods to eliminate or reduce this stray light.

    Main Methods:

    • Theoretical analysis of double and higher multiple dispersions.
    • Experimental investigation of stray light phenomena.
    • Analysis of diffraction orders.

    Main Results:

    • An upper bound for stray light wavelength was determined as a function of grating spacing.

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  • Finely ruled gratings can eliminate stray light over desired wavelength ranges.
  • Proposed improvements to existing masking techniques.

    • Conclusions:

    • Stray light due to multiple dispersions is a significant issue in grating spectrometers.
    • The choice of grating spacing is critical for minimizing stray light.
    • This research provides practical solutions for enhancing spectral purity.