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Automatic Laser-based Geometry Capture for Finite Element Analysis of Weld Beads
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Published on: July 25, 2025

Geometrical form factors for the lidar function.

T Halldórsson, J Langerholc

    Applied Optics
    |February 23, 2010
    PubMed
    Summary
    This summary is machine-generated.

    This study calculates atmospheric backscattering form factors for lidar systems. Results show how telescope field of view, laser divergence, and misalignment affect backscatter patterns.

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    Published on: April 1, 2020

    Area of Science:

    • Atmospheric optics
    • Laser remote sensing
    • Optical engineering

    Background:

    • Lidar systems rely on accurate modeling of atmospheric backscattering.
    • Understanding the form factors of backscattered laser light is crucial for signal interpretation.
    • Telescope aperture characteristics and laser emission properties influence signal propagation.

    Purpose of the Study:

    • To calculate atmospheric backscattering form factors for lidar receiving telescopes.
    • To analyze the impact of geometrical optics and TEM(00) laser emission on backscattering.
    • To investigate the effects of axial aperture displacement and transmitter misalignment.

    Main Methods:

    • Calculations performed in the limiting cases of geometrical optics and pure TEM(00) laser emission.
    • Axial aperture displacement and transmitter axis misalignment were considered.
    • Numerical results were plotted to visualize the effects of various parameters.

    Main Results:

    • Form factors were determined considering both optical limits and misalignments.
    • Plots illustrate the influence of telescope field of view on backscattering.
    • Laser beam divergence and misalignment effects on backscatter patterns are presented.

    Conclusions:

    • The study provides calculated form factors for lidar atmospheric backscattering.
    • Numerical results demonstrate the sensitivity of backscattering to optical parameters and misalignments.
    • Findings are essential for optimizing lidar system design and data analysis.