23 September 2015 Influence of aspherical surfaces description on aberration correction
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Aspherical surfaces are widely used in optical systems of various applications. Optical design tools (Zemax, CODE-V and others) offers various types of aspherical surfaces equations to be used in designs, but it is always a question how properly choose what coefficients and what number of coefficients should be used. It can be shown that usage special type of aspherical equation where the profile is described by dependence of the quadratic height from the z-sag. Each coefficient in this equation affects the only one aberration order. Unfortunately, such type of equation is rather rarely used in optical design tools. Special procedure can be developed for approximation of this equation to the common equation. The routine calculates aspherical coefficients for the most widely used type of an even asphere equation and finds a standard deviation of the initial surface from the approximated. Thus user can decide to use more coefficients or keep the number. The presented routine helps to find the coefficients in aspherical equation that responsible for the each aberration order and helps to find out the optimal number of aspherical coefficients for correction during optimization. Examples of aberration correction using different types of aspherical surfaces equations are presented in the paper.
© (2015) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Galina Romanova, Galina Romanova, Tatiana Ivanova, Tatiana Ivanova, Tatiana Zhukova, Tatiana Zhukova, Aleksei Garshin, Aleksei Garshin, Ruslan Dantcaranov, Ruslan Dantcaranov, } "Influence of aspherical surfaces description on aberration correction", Proc. SPIE 9626, Optical Systems Design 2015: Optical Design and Engineering VI, 96262T (23 September 2015); doi: 10.1117/12.2191117; https://doi.org/10.1117/12.2191117


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