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Related Concept Videos

Deflection of a Beam01:19

Deflection of a Beam

256
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.
Singularity functions, described in an earlier lesson, are powerful mathematical tools that represent discontinuities within a function commonly encountered in structural loading...
256

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Cost-effective 3D-printed rotatable reflectors for two-dimensional beam steering.

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    We developed a low-cost 2D optical scanning module using 3D-printed rotating mirrors. This technology offers a potential upgrade for rangefinders into simplified LiDAR systems.

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    Area of Science:

    • Optics and Photonics
    • MEMS (Micro-Electro-Mechanical Systems)
    • Additive Manufacturing

    Background:

    • Conventional galvanometer scanners are expensive for many applications.
    • There is a need for cost-effective optical scanning solutions.
    • Existing 2D scanning modules often lack detailed analysis of combined single-axis distortions.

    Purpose of the Study:

    • To develop and characterize a novel 2D optical scanning module using 3D-printed components.
    • To investigate the performance and limitations of cascaded single-axis rotating mirrors.
    • To explore the potential of this module as a low-cost alternative for applications like LiDAR.

    Main Methods:

    • Fabrication of a 2D optical scanning module with large-area, 3D-printed rotating mirrors (X: 30x30 mm², Y: 60x25 mm²).
    • Utilized silicon substrates coated with aluminum as mirror surfaces.
    • Actuation via DC voltage applied to electromagnets interacting with embedded permanent magnets.
    • Experimental measurement of static optical scan angles and simulation of observed distortions.

    Main Results:

    • Achieved static optical scan angles of ~11.8° (X-axis) and ~4.5° (Y-axis) at 12 VDC.
    • Observed and simulated a fan-shaped distortion resulting from the combination of single-axis scanners.
    • Demonstrated correlation between simulation predictions and experimental results for the distortion.

    Conclusions:

    • The developed 3D-printed 2D optical scanning module offers a low-cost alternative to traditional scanners.
    • The module shows potential for upgrading rangefinders to simplified LiDAR systems.
    • Further research into understanding and mitigating scan distortions is warranted.