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Related Concept Videos

IR Spectrometers01:25

IR Spectrometers

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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Related Experiment Video

Updated: Jun 12, 2026

Biomolecular Detection employing the Interferometric Reflectance Imaging Sensor (IRIS)
11:04

Biomolecular Detection employing the Interferometric Reflectance Imaging Sensor (IRIS)

Published on: May 3, 2011

Range sensing based on shearing interferometry.

G Häusler, J H Less, M Maul

    Applied Optics
    |June 12, 2010
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces an optical range sensor combining focus sensing and interferometry. It achieves high depth resolution for various surfaces, offering a simple, robust, and compact solution.

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    Area of Science:

    • Optical Engineering
    • Metrology
    • Sensor Technology

    Background:

    • Traditional optical range sensors face limitations in handling diverse surface reflectivity.
    • Existing interferometric and focus sensing techniques have specific drawbacks.
    • Need for compact, vibration-robust sensors with high depth resolution.

    Purpose of the Study:

    • To develop a novel optical range sensor integrating focus sensing and interferometry.
    • To achieve high depth resolution for both specularly and diffusely reflecting objects.
    • To create a simple, robust, and compact sensor design.

    Main Methods:

    • Utilized shearing interferometry to measure the radius of scattered waves.
    • Employed a projected light spot on the object under test.
    • Integrated principles of focus sensing with interferometric measurements.

    Main Results:

    • The sensor demonstrates effectiveness for both specular and diffuse reflectors.
    • Achieved high depth resolution.
    • The sensor design is simple, robust against vibrations, and features a small aperture, minimizing shading.

    Conclusions:

    • The developed optical range sensor successfully combines focus sensing and interferometry.
    • Offers a versatile, high-resolution, and robust solution for optical metrology.
    • The compact design and broad applicability make it suitable for various applications.