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3D printed optical concentrators for LED arrays.

Behrang H Hamadani1, Jonathan Seppala2, Clarence Zarobila3

  • 1Engineering Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA.

OSA Continuum
|December 7, 2020
PubMed
Summary
This summary is machine-generated.

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Additive manufacturing enables high-quality optical components. 3D-printed waveguide concentrators achieve high irradiance (17 kW/m²) with low nonuniformity, rivaling laser intensities for specialized applications.

Area of Science:

  • Optics and Photonics
  • Additive Manufacturing
  • Optical Engineering

Background:

  • Photopolymerization-based additive manufacturing offers potential for high-quality, transparent optical components.
  • Customized optical components are crucial for specific, narrow applications.

Purpose of the Study:

  • To model and fabricate optimized freeform nonimaging concentrators for a 12-LED array using additive manufacturing.
  • To characterize the optical performance of 3D-printed waveguide concentrators.
  • To explore the application of these concentrators in creating a solar simulator.

Main Methods:

  • Optical raytracing simulations were performed to design the nonimaging concentrator.
  • Waveguide concentrators were fabricated using 3D printing (photopolymerization).

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  • Optical characteristics, including irradiance and nonuniformity, were experimentally measured.

    • Main Results:

    • Achieved irradiance exceeding 17 kW/m² over an area of approximately 1 cm².
    • Demonstrated irradiance nonuniformity better than 2%.
    • The fabricated concentrators rivaled intensities achieved by powerful lasers over a similar area.

    Conclusions:

    • Additive manufacturing is a viable method for producing high-performance optical concentrators.
    • The developed waveguide concentrators are suitable for applications requiring high irradiance and uniformity.
    • A solar simulator was successfully constructed by coupling multiple LED types into the waveguides.