Correcting variable third-order astigmatism introduced by conformal aspheric surfaces

Michael R. Whalen

doi:10.1117/12.322032

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21 September 1998 Correcting variable third-order astigmatism introduced by conformal aspheric surfaces

Michael R. Whalen

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Proceedings Volume 3482, International Optical Design Conference 1998; (1998) https://doi.org/10.1117/12.322032
Event: International Optical Design Conference, 1998, Kona, HI, United States

Abstract

Conformal dome surfaces may enhance the overall performance of missile systems employing optical sensors by providing a more aerodynamically shaped airframe, however realistic implementation of these highly aspheric surfaces is currently limited by the severe image aberrations they introduce to the transmitted wavefront. This paper proposes an optical correction technique designed to combat the large magnitude and varying nature of third order astigmatism introduced by conformal missile domes. The newly developed technique utilizes axial translation of crossed cylindrical elements to provide variable astigmatism correction as a function of sensor gimbal angle. Theoretical motivation for the optical correction technique is provided, and its performance is assessed in a sample conformal dome and optical sensor systems.

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Michael R. Whalen "Correcting variable third-order astigmatism introduced by conformal aspheric surfaces", Proc. SPIE 3482, International Optical Design Conference 1998, (21 September 1998); https://doi.org/10.1117/12.322032

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