Designing Korsch and Ritchey --- Chretien Optical Schemes with a Lens Corrector for the Small-Sized Earth Remote Sensing Systems

Abstract

The paper considers the Ritchey --- Chretien optical system with the field aberration lens corrector and the three-mirror Korsch scheme, which could be used as the high-resolution systems for small spacecraft, including the CubeSat format. Lens calculation and mass-dimensional characteristics analysis of their optical elements were performed. It presents main optical and technical parameters, as well as the optical systems characteristics, for small spacecraft. Using the modulation transfer function of the optical system, the image quality was assessed. It is shown that the optical elements masses of the Korsch and Ritchey --- Chretien schemes with a lens corrector depend not only on the system focal length and the input aperture diameter, but also on the angular field, which, in turn, depends on the required system capture band and the lightweight mirror manufacture technology. Mass-dimension and aberration capabilities of the calculated schemes were analyzed with the mass of optical elements less than 5 kg being of greatest interest when creating a multi-component satellite constellation of small spacecraft. It is shown that the methodology for calculating and estimating the lens mass already at the initial stage of designing small spacecraft makes it possible to select the best optical design that would determine their characteristics, mass and overall dimensions, which would shorten the development process, selection of a launch vehicle and reduce the final product cost

Please cite this article in English as:

Zavarzin V.I., Oreshechkin S.S. Designing Korsch and Ritchey --- Chretien optical schemes with a lens corrector for the small-sized Earth remote sensing systems. Herald of the Bauman Moscow State Technical University, Series Instrument Engineering, 2023, no. 4 (145), pp. 4--23 (in Russ.). DOI: https://doi.org/10.18698/0236-3933-2023-4-4-23

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