John Peter Oakley (Other)

    Research output: Patent

    11 Downloads (Pure)


    Compensation for spherical aberration in retroreflectors to improve the retroreflector performance. A retroreflector has at least two concentric spherical layers. A first of the layers is of uniform refractive index n1 surrounding a second of the layers of uniform refractive index n2. The refractive indices satisfy the criteria n1> n2. A retroreflector is formed as a sphere having a predetermined refractive index and radius, such that spherical aberration of incident radiation is at least partially compensated for by primary defocus.
    Original languageEnglish
    Patent numberWO/2008/007044
    Publication statusPublished - 17 Jan 2008


    • retroreflector


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