5 June 2018 Induced 3rd order spherochromatism
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In general, spherochromatism is denoted as the color variation of spherical aberration in refracting optical systems. If primary axial and lateral color is corrected, in most of the cases spherochromatism is the dominating chromatic aberration. However, in literature only some selected design examples and certain special cases were discussed, but a general analytical 3rd-order description based on the chromatic variation of Seidel’s surface contribution for spherical aberration, has not been considered yet. Since furthermore, those selected design examples indicates that spherochromatism is expected to show induced aberration parts, caused by the primary color aberrations of the system, this paper introduces a new description of the 3rd-order surface contribution for spherochromatism and gives a discussion on its dependencies on intrinsic and induced aberration parts.
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A. Berner, Y. Zhang, H. Gross, "Induced 3rd order spherochromatism", Proc. SPIE 10690, Optical Design and Engineering VII, 106900J (5 June 2018); doi: 10.1117/12.2315803; https://doi.org/10.1117/12.2315803

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