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Telecentric DLP optical engine for an optical-based 3D printer.

Karim Ali, Mayar Magdy, Karim El-Seherawy

    Applied Optics
    |August 12, 2025
    PubMed
    Summary
    This summary is machine-generated.

    A new telecentric digital light processing engine using a digital micromirror device offers a cost-effective solution for optical 3D printing. This system achieves high resolution and a large printing area with minimal distortion.

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    Area of Science:

    • Optical Engineering
    • Additive Manufacturing
    • Microscopy

    Background:

    • Digital Light Processing (DLP) engines are crucial for 3D printing.
    • Telecentric optics minimize distortion and ensure uniform magnification.
    • Cost-effective solutions are needed to broaden 3D printer accessibility.

    Purpose of the Study:

    • To design and validate a cost-effective telecentric DLP engine for optical 3D printing.
    • To optimize the projection lens and beam homogenizer for performance.
    • To demonstrate the system's capability for fabricating 3D structures.

    Main Methods:

    • Design and simulation of a telecentric projection lens and beam homogenizer.
    • Sequential and non-sequential ray tracing for optimization.
    • Fabrication of the lens holder using a benchtop 3D printer.
    • Optical characterization and 3D printing tests.

    Main Results:

    • Achieved a resolution of 125 µm.
    • Magnification of 13.5×.
    • Printing area of 80mm × 13mm.
    • Measured distortion less than 1.6%.

    Conclusions:

    • The proposed telecentric DLP engine is a viable, affordable solution for optical 3D printing.
    • The system demonstrates good optical performance and printing capabilities.
    • Benchtop 3D printing enables efficient integration of optical components.