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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.
Imaging Biological Samples with Optical Microscopy01:18

Imaging Biological Samples with Optical Microscopy

Optical microscopy uses optic principles to provide detailed images of samples. Antonie van Leeuwenhoek designed the first compound optical microscope in the 17th century to visualize blood cells, bacteria, and yeast cells. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes with enhanced magnification and resolution.
In optical microscopy, the specimen to be viewed is placed on a glass slide and clipped on the stage...

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A Field Primer for Monitoring Benthic Ecosystems Using Structure-From-Motion Photogrammetry
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Published on: April 15, 2021

Viewing method for improving underwater visibility by reduction of backscatter.

S Liu, Y Chen, Y Xia

    Applied Optics
    |October 12, 2010
    PubMed
    Summary

    This study introduces a novel method using timed light pulses and optical shutters to enhance underwater visibility. Experiments confirm this technique significantly improves target contrast and viewing distance in aquatic environments.

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    Area of Science:

    • Optical Engineering
    • Oceanography
    • Signal Processing

    Background:

    • Underwater visibility is often limited by light scattering and absorption.
    • Traditional methods struggle to overcome the challenges of murky aquatic environments.

    Purpose of the Study:

    • To develop and validate a new method for improving underwater target visibility.
    • To increase the effective range of detection in submerged conditions.

    Main Methods:

    • Utilizing a specialized series of intervallic light pulses.
    • Employing two precisely controlled optical shutters for emitting and receiving signals.
    • Synchronously delaying control signals for optimized data acquisition.

    Main Results:

    • Calculations demonstrated a significant improvement in apparent target contrast.
    • The method showed a potential increase in the visible distance to targets.
    • Experimental validation confirmed the feasibility and effectiveness of the technique.

    Conclusions:

    • The proposed method offers practical advantages for enhancing underwater visibility.
    • This technique represents a viable advancement for underwater observation and detection systems.