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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.
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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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.