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Related Concept Videos

Super-resolution Fluorescence Microscopy01:37

Super-resolution Fluorescence Microscopy

Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been developed.
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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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High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques
11:34

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Published on: December 3, 2013

Interferometric methods with enhanced sensitivity by optical/digital fringe multiplication.

B Han

    Applied Optics
    |September 11, 2010
    PubMed
    Summary
    This summary is machine-generated.

    The optical/digital fringe multiplication method enhances phase measurement accuracy for periodic patterns. This study derives its equations and compares it to other image processing techniques.

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    Area of Science:

    • Optics and Photonics
    • Digital Image Processing
    • Metrology

    Background:

    • Accurate phase measurement is crucial in optical metrology.
    • Existing fringe analysis methods have limitations in certain applications.
    • Periodic intensity distributions are common in fringe patterns.

    Purpose of the Study:

    • To derive the equations for the optical/digital fringe multiplication method.
    • To demonstrate the method using a shadow moiré experiment.
    • To compare the method's performance against other image processing techniques.

    Main Methods:

    • Derivation of fringe multiplication equations for general periodic intensity distributions.
    • Application of the method to shadow moiré fringe patterns with triangular intensity profiles.
    • Comparative analysis of advantages and disadvantages with alternative image processing methods.

    Main Results:

    • The optical/digital fringe multiplication method's equations are established.
    • Successful demonstration of the method in a shadow moiré experiment.
    • Identification of specific benefits and drawbacks compared to other techniques.

    Conclusions:

    • The optical/digital fringe multiplication method offers a viable approach for phase measurement.
    • The method is particularly applicable to periodic fringe patterns, such as those from shadow moiré.
    • Understanding its comparative strengths and weaknesses aids in selecting appropriate metrology techniques.