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Related Concept Videos

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.
The ATR process begins by directing a beam...
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Angle-resolved spectral reflectometry with a digital light processing projector.

Garam Choi, Mingyu Kim, Jinyong Kim

    Optics Express
    |September 10, 2020
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a new angle-resolved spectral reflectometry method using a digital light processing (DLP) projector. The technique offers high accuracy for thin-film inspection, verified against commercial ellipsometers.

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    Area of Science:

    • Optics and Photonics
    • Materials Science
    • Spectroscopy

    Background:

    • Traditional spectral reflectometry methods can be complex and time-consuming.
    • Accurate thin-film characterization is crucial for various industries.

    Purpose of the Study:

    • To develop a novel, efficient, and accurate method for angle-resolved spectral reflectometry.
    • To enable precise thin-film inspection using a digital light processing (DLP) projector.

    Main Methods:

    • Utilized a DLP projector to generate ring patterned images projected onto the back focal plane of an objective lens.
    • Varied the angle of incidence by adjusting the radius on the back focal plane.
    • Captured image plane intensity across angular and spectral axes.
    • Employed fiber optics to reduce spot size and precisely locate measurement areas.

    Main Results:

    • The proposed method demonstrated rapid angle-of-incidence changes.
    • Accurate measurement of thin-film samples was achieved.
    • Results were validated by comparison with a commercial ellipsometer, showing high accuracy.

    Conclusions:

    • The novel DLP-based angle-resolved spectral reflectometry offers a highly accurate and efficient approach for thin-film inspection.
    • This method provides a valuable tool for materials characterization and quality control.