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Correction of Presbyopia by Monocular Bi-Aspheric Ablation Profile
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Wide angle lenses with aspheric correcting surfaces.

R T Jones1

  • 1Avco Everett Research Laboratory, Everett,Massachusetts 02149, USA.

Applied Optics
|January 9, 2010
PubMed
Summary

This study analyzes refracting optical elements with aspheric surfaces. These systems offer wide aperture and field of view without obstruction, but are limited to monochromatic light.

Area of Science:

  • Optics
  • Optical Engineering
  • Aspheric Optics

Background:

  • Refracting optical systems often face limitations in aperture and field of view.
  • Obstructing surfaces can degrade image quality in conventional optical designs.

Purpose of the Study:

  • To analyze refracting elements with aspheric correcting surfaces positioned near their center of curvature.
  • To explore the potential for wide aperture and wide field of view in such systems.
  • To investigate methods for determining the precise forms of these aspheric surfaces.

Main Methods:

  • Analysis of refracting elements with aspheric correcting surfaces.
  • Comparison with established optical systems like the Schmidt reflector.
  • Determination of correcting surface forms using third-order theory.

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  • Numerical integration of exact optical equations.

    • Main Results:

    • Systems with aspheric correcting surfaces near the center of curvature can achieve wide aperture and field of view.
    • These systems are free from obstructing surfaces, improving optical performance.
    • The refracting systems are inherently limited to nearly monochromatic radiation due to uncorrected dispersion.
    • Typical forms of the correcting surfaces were successfully determined.

    Conclusions:

    • Aspheric correcting surfaces offer a promising design for wide-aperture, wide-field refracting optical systems.
    • The absence of obstructing surfaces is a significant advantage.
    • Chromatic aberration remains a key limitation, restricting applications to monochromatic or near-monochromatic radiation.
    • The developed methods provide precise ways to design these specialized optical elements.