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Related Concept Videos

IR Spectrometers01:25

IR Spectrometers

2.0K
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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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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Ultraviolet and Visible (UV–Vis) Spectroscopy: Overview01:02

Ultraviolet and Visible (UV–Vis) Spectroscopy: Overview

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Ultraviolet–visible (UV–visible or UV–Vis) spectroscopy is an analytical technique that investigates the interaction between matter and UV–Vis light within the electromagnetic spectrum. This method is widely used for its versatility, simplicity, and relatively quick data acquisition, making it valuable for both qualitative and quantitative analysis. When UV–Vis radiation passes through a material,  molecules absorb light depending on the energy required for...
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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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Infrared (IR) Spectroscopy: Overview01:09

Infrared (IR) Spectroscopy: Overview

4.4K
When electromagnetic radiation passes through a material, atoms or molecules transition from a lower to a higher energy state by absorbing radiation corresponding to the energy difference between the two states. The absorption of infrared (IR) radiation causes transitions between vibrational energy levels in a molecule. Therefore, IR spectroscopy is a useful analytical tool for determining the molecular structure of molecules.
Different compounds display unique properties due to their...
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Applications of IR Spectroscopy: Overview01:11

Applications of IR Spectroscopy: Overview

1.8K
The non-destructive nature and ability to provide valuable chemical information make IR spectroscopy a versatile technique with broad applications in various scientific and industrial fields. IR spectroscopy is commonly used to identify and characterize organic and inorganic compounds. It provides information about the functional groups present in a molecule and the bonding between atoms. This helps in the structural elucidation of compounds during organic synthesis, pharmaceutical research,...
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Imaging Fourier spectrometer in visible domain: design concept.

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    Applied Optics
    |August 5, 2020
    PubMed
    Summary

    A new imaging Fourier spectrometer prototype uses corner-cube reflectors for stable operation. This design enhances field of view and optical signal, enabling pixel-by-pixel spectral measurements.

    Area of Science:

    • Optics and Photonics
    • Spectroscopy
    • Instrument Development

    Background:

    • Traditional Fourier spectrometers can lack stability and imaging capabilities.
    • Limitations in field of view restrict optical signal input in conventional designs.

    Purpose of the Study:

    • To develop a prototype imaging Fourier spectrometer for visible and near-infrared spectroscopy.
    • To enhance operational stability and increase optical signal input through advanced optical design.

    Main Methods:

    • Utilized a Michelson interferometer incorporating corner-cube reflectors.
    • Implemented an imaging mode for wide field of view data acquisition.
    • Employed a high-speed camera for recording optical signals.

    Main Results:

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    • Achieved a stable prototype imaging Fourier spectrometer.
    • Demonstrated enhanced field of view and increased input optical signal.
    • Enabled spectral measurements for each pixel within the image.

    Conclusions:

    • The developed imaging Fourier spectrometer offers improved stability and performance.
    • Corner-cube reflectors are effective in enhancing operational stability.
    • The imaging capability significantly boosts optical signal and enables spatially resolved spectral analysis.