Reference for citation: Nguyen D. H., Bakholdin A. B. Three-lens six-color superachromat of a wide spectral range. Journal of Instrument Engineering. 2023. Vol. 66, N 6. P. 464—471 (in Russian). DOI: 10.17586/0021-3454-2023-66-6-464-471.

Abstract. Optical systems of 6-color superachromats with corrected longitudinal chromatic aberration in a wide spectral range are studied. An algorithm for automatic synthesis of three-lens objective with corrected longitudinal chromatic aberration in a wide spectral range is developed. Synthesis of apochromats is performed on the basis of the thirdorder aberrations theory. The method of exhaustive search of calculated objectives from a user-specified catalog of materials is applied. A two-stage ranking system of calculated objectives, taking into account the axial point image quality and the sensitivity of the objective to manufacturing errors, is proposed. Solutions for three-lens 6-color superachromats in the spectral range 365–1000 nm are found. The design parameters of several options of practical interest are given. The presented apochromats and superachromats can be used as objectives of telescopic systems or collimators.

Keywords: optical system design, triplet, superachromat, apochromat, secondary spectrum

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