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Related Experiment Video

Updated: Jun 12, 2026

Indoor Experimental Assessment of the Efficiency and Irradiance Spot of the Achromatic Doublet on Glass (ADG) Fresnel Lens for Concentrating Photovoltaics
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Hybrid diffractive-refractive lenses and achromats.

T Stone, N George

    Applied Optics
    |June 10, 2010
    PubMed
    Summary

    Hybrid optical elements combining diffractive and refractive properties offer versatile control over chromatic dispersion, enabling novel achromatic designs with reduced glass curvature. These elements are ideal for advanced optical systems requiring precise aberration correction.

    Area of Science:

    • Optics and Photonics
    • Optical Engineering

    Background:

    • Traditional optical systems often rely on complex arrangements of refractive lenses to manage chromatic dispersion.
    • Achieving achromatic correction typically requires specific glass types and multiple lens elements, increasing system complexity and cost.

    Purpose of the Study:

    • To investigate hybrid optical elements integrating diffractive (holographic) and refractive components.
    • To demonstrate the ability to achieve arbitrary or achromatic dispersive characteristics with these hybrid elements.
    • To explore the potential for reduced glass curvature and improved performance in optical systems.

    Main Methods:

    • Coating a volume holographic element onto a crown glass lens surface.
    • Varying power distributions between refractive and holographic components while maintaining constant overall optical power.

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  • Analyzing the effective Abbe V numbers and partial dispersions of the hybrid elements.

    • Main Results:

    • Effective Abbe V numbers of hybrid elements span all real numbers except a narrow interval around zero.
    • Achromatic designs (infinite V number) with hybrid elements show significantly reduced glass curvatures compared to all-refractive systems.
    • Hybrid three-color achromats exhibit greatly reduced glass curvatures due to the dispersion mismatch between holographic and glass materials.
    • High diffraction efficiency and broad spectral bandwidths (>3000 A) were achieved.

    Conclusions:

    • Hybrid refractive-diffractive elements provide a powerful method for controlling optical dispersion, including achromatic correction.
    • These elements offer advantages such as reduced glass curvature, enabling more compact and cost-effective high-performance optical systems.
    • Applications include broadband achromatic objectives and versatile chromatic aberration corrector plates.