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Related Concept Videos

Deflection of a Beam01:19

Deflection of a Beam

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Accurately determining beam deflection and slope under various loading conditions in structural engineering is crucial for ensuring safety and structural integrity. Singularity functions offer a streamlined approach to analyzing beams, especially when multiple loading functions complicate the bending moment equation.
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Deformation of a Beam under Transverse Loading01:15

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Updated: Feb 20, 2026

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Optical beam deflection sensor: design and experiments.

João M S Sakamoto, Renan B Marques, Cláudio Kitano

    Applied Optics
    |October 20, 2017
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    Summary
    This summary is machine-generated.

    A novel double-pass optical beam deflection sensor was developed for monitoring high-energy laser processes. Its mathematical model and experimental validation demonstrate potential for applications like laser welding and ablation.

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    Area of Science:

    • Optics and Photonics
    • Materials Science
    • Laser Technology

    Background:

    • Optical beam deflection sensors are crucial for non-contact monitoring.
    • High-energy laser processes like welding and ablation require precise monitoring tools.
    • Existing methods may lack the sensitivity or robustness for certain applications.

    Purpose of the Study:

    • To present a novel double-pass optical beam deflection sensor.
    • To develop and validate a mathematical model for the sensor's optical design.
    • To demonstrate the sensor's capability in detecting laser-generated acoustic pulses.

    Main Methods:

    • Development of a mathematical model for the double-pass optical beam deflection sensor.
    • Computational simulations to analyze sensor behavior and characteristic curves.
    • Experimental validation of the mathematical model using acquired characteristic curves.
    • Application of the sensor to detect acoustic pulses from pulsed laser-induced surface events.

    Main Results:

    • The mathematical model accurately predicted the sensor's characteristic curves.
    • Simulations provided insights into design parameter influences on sensor performance.
    • Experimental validation confirmed the model's reliability.
    • The sensor successfully detected acoustic pulses generated by a pulsed laser on a sample surface.

    Conclusions:

    • The developed double-pass optical beam deflection sensor is effective for monitoring.
    • The validated mathematical model facilitates optimized sensor design.
    • The sensor shows significant potential for monitoring high-energy laser applications such as laser welding and ablation.