Modelling of influence of spherical aberration coefficients on depth of focus of optical systems

Petr Pokorný; Filip Šmejkal; Pavel Kulmon; Antonín Mikš; Jiří Novák; Pavel Novák

doi:10.1117/12.2270082

26 June 2017 Modelling of influence of spherical aberration coefficients on depth of focus of optical systems

Petr Pokorný, Filip Šmejkal, Pavel Kulmon, Antonín Mikš, Jiří Novák, Pavel Novák

Proceedings Volume 10330, Modeling Aspects in Optical Metrology VI; 103301B (2017) https://doi.org/10.1117/12.2270082
Event: SPIE Optical Metrology, 2017, Munich, Germany

Abstract

This contribution describes how to model the influence of spherical aberration coefficients on the depth of focus of optical systems. Analytical formulas for the calculation of beam's caustics are presented. The conditions for aberration coefficients are derived for two cases when we require that either the Strehl definition or the gyration radius should be the identical in two symmetrically placed planes with respect to the paraxial image plane. One can calculate the maximum depth of focus and the minimum diameter of the circle of confusion of the optical system corresponding to chosen conditions. This contribution helps to understand how spherical aberration may affect the depth of focus and how to design such an optical system with the required depth of focus. One can perform computer modelling and design of the optical system and its spherical aberration in order to achieve the required depth of focus.

Citation Download Citation

Petr Pokorný, Filip Šmejkal, Pavel Kulmon, Antonín Mikš, Jiří Novák, and Pavel Novák "Modelling of influence of spherical aberration coefficients on depth of focus of optical systems", Proc. SPIE 10330, Modeling Aspects in Optical Metrology VI, 103301B (26 June 2017); https://doi.org/10.1117/12.2270082

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