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Related Concept Videos

IR Spectrometers01:25

IR Spectrometers

3.6K
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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Raman Spectroscopy Instrumentation: Overview01:26

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A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
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A Multimodal Wide-Field Fourier-Transform Raman Microscope
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High-speed broadband FTIR system using MEMS.

N Pelin Ayerden, Ugur Aygun, Sven T S Holmstrom

    Applied Optics
    |November 18, 2014
    PubMed
    Summary
    This summary is machine-generated.

    A new microelectromechanical system (MEMS)-based Fourier transform infrared spectroscopy (FTIR) system offers a fast, compact, and vibration-insensitive alternative to traditional FTIR. This innovative infrared spectroscopy technology achieves high performance in a smaller footprint.

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    Area of Science:

    • Spectroscopy
    • Optical Engineering
    • Microelectromechanical Systems

    Background:

    • Traditional Fourier transform infrared spectroscopy (FTIR) systems are effective but suffer from bulkiness, vibration sensitivity, and slow measurement times.
    • Existing FTIR limitations hinder their application in space-constrained or dynamic environments.

    Purpose of the Study:

    • To develop a novel, compact, and rapid Fourier transform infrared spectroscopy (FTIR) system.
    • To overcome the size, speed, and environmental sensitivity limitations of current FTIR instruments.

    Main Methods:

    • Development of a microelectromechanical system (MEMS)-based lamellar grating interferometer.
    • Integration of a custom infrared (IR) detector and a compact blackbody source.
    • Optimization of MEMS device parameters (active area, displacement, resonant frequency) for performance.

    Main Results:

    • Demonstrated a fast, compact, and achromatic FTIR system using MEMS technology.
    • Achieved spectral resolution of 15-20 cm⁻¹ in the 2.5-16 μm range with measurement times as low as 1.5 ms.
    • Confirmed long-term measurement stability.

    Conclusions:

    • The MEMS-based FTIR system presents a significant advancement over conventional FTIR instruments.
    • This technology enables rapid, high-resolution infrared spectroscopy in a portable and robust package.
    • Potential applications include field measurements, remote sensing, and portable analytical devices.