Calculation Method of a Long-Focus High-Aperture Catadioptric Objective

Abstract

The growing number of artificial satellites in the near-Earth space causes an urgent need for the development of optoelectronic systems for Earth remote sensing and space monitoring. The article proposes an optical layout of a long-focus high-aperture catadioptric objective and develops the methodology of its design. The layout of the objective optical system consists of a convex-plane lens, a Mangen lens and a two-lens compensator installed near the image plane. The optical elements of the objective are combined into three groups. The lens presented in the paper has the effective focal length of 1500 mm, F-number 2.4 and angular field of view 2°22′, provides high image quality while ensuring optimal mass and dimensional characteristics. The maximum diameter of the lens components and the total axial length from the top of the first surface to the image plane are 0.4F′ and 0.6F′ respectively. It is shown that with a relatively simple construction in the proposed optical scheme it is possible to obtain a sufficiently perfect correction of spherical aberration, chromatic aberrations and tangential coma. Based on four lens elements made of three conventional optical materials the objective has no aspherical surfaces, thus making the system more technologically advanced in the production and assembling. It allows to use this layout for creation of optoelectronic equipment characterized by simplicity of realization due to well mastered technologies of manufacturing of lens and mirror elements

Please cite this article in English as:

Zavarzin V.I., Bodrov S.V., Krylova M.K. Calculation method of a long-focus high-aperture catadioptric objective. Herald of the Bauman Moscow State Technical University, Series Instrument Engineering, 2025, no. 1 (150), pp. 34--49 (in Russ.). EDN: YMKBHO

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