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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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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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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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Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

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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....
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Attenuated Total Reflectance (ATR) Infrared Spectroscopy: Overview01:13

Attenuated Total Reflectance (ATR) Infrared Spectroscopy: Overview

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Attenuated total reflectance (ATR) infrared spectroscopy is a powerful analytical technique used to study the composition of materials. It is widely employed in chemistry, materials science, forensic science, and other fields where sample characterization is required. ATR has several advantages over traditional transmission IR spectroscopy, including the requirement of little to no sample preparation and the ability to analyze a wide range of samples.
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Atomic Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

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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.
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High Speed Sub-GHz Spectrometer for Brillouin Scattering Analysis
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Ultracompact focal plane snapshot spectropolarimeter.

Jie Li, Haiying Wu, Chun Qi

    Applied Optics
    |November 2, 2019
    PubMed
    Summary

    We developed a novel snapshot spectropolarimeter for rapid, full Stokes data acquisition. This high-throughput, compact instrument utilizes a wave plate array and birefringent interferometer for efficient polarization measurements.

    Area of Science:

    • Optics and Photonics
    • Polarimetry
    • Interferometry

    Background:

    • Full Stokes spectropolarimetry is crucial for characterizing polarized light.
    • Existing methods often lack speed, compactness, or high throughput.

    Purpose of the Study:

    • To introduce a new focal plane snapshot full Stokes spectropolarimeter.
    • To demonstrate its capability for rapid, high-throughput data acquisition.

    Main Methods:

    • Utilizes a wave plate array and a birefringent interferometer.
    • Acquires four modulated subinterferograms in a single exposure.
    • Reconstructs Stokes parameters via inverse Fourier transforms and matrix operations.

    Main Results:

    • Successfully demonstrated snapshot spectropolarimetric data acquisition.

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  • Achieved high throughput and an ultracompact instrument design.
  • Validated the reconstruction of full wavelength Stokes parameters.

    • Conclusions:

    • The developed spectropolarimeter offers a significant advancement in snapshot polarization measurement.
    • Its high throughput and compact nature make it suitable for various applications.
    • This technique enables efficient acquisition of comprehensive spectropolarimetric information.