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Converting a Texas Instruments DLP4710 DLP evaluation module into a spatial light modulator.

Mitchell A Cox, Alice V Drozdov

    Applied Optics
    |January 15, 2021
    PubMed
    Summary
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    We converted a low-cost digital light projector (DLP) into a spatial light modulator using a 3D printed mount. This device accurately shapes laser beams in real-time with high resolution.

    Area of Science:

    • Optics and Photonics
    • Laser Beam Shaping
    • Spatial Light Modulation

    Background:

    • Digital micro-mirror devices (DMDs) offer advantages over liquid crystal spatial light modulators for laser beam shaping.
    • Key advantages include lower cost, high speed, and independence from polarization and wavelength.

    Purpose of the Study:

    • To detail the conversion of a commercial digital light projector (DLP) evaluation module into a functional spatial light modulator.
    • To demonstrate the device's capability for real-time laser beam shaping, specifically Laguerre-Gauss modes.

    Main Methods:

    • Utilized a Texas Instruments DLP4710 DMD within a low-cost DLP evaluation module.
    • Employed a 3D printed mount for the conversion process.
    • Integrated the device for real-time operation via HDMI connection.

    Related Experiment Videos

    Main Results:

    • The converted device achieved accurate shaping of Laguerre-Gauss laser modes.
    • Real-time hologram refresh rate of 180 Hz was demonstrated.
    • The spatial light modulator offers a resolution of 1920×1080 pixels on a 0.47-inch diagonal screen.

    Conclusions:

    • A cost-effective method for creating a high-performance spatial light modulator from a DLP evaluation module was successfully developed.
    • The resulting device is suitable for real-time laser beam shaping applications, including advanced optical modes.