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ISSN: 1023-5086

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ISSN: 1023-5086

Scientific and technical

Opticheskii Zhurnal

A full-text English translation of the journal is published by Optica Publishing Group under the title “Journal of Optical Technology”

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DOI: 10.17586/1023-5086-2023-90-01-12-25

УДК: 535.317

Automation of calculation of “cemented doublet with a singlet” and “singlet with a cemented doublet” objectives

Nguyen, Duy Hung, Bakholdin, A.V.

Full text on elibrary.ru

Publication in Journal of Optical Technology

For Russian citation (Opticheskii Zhurnal):

Нгуен З.Х., Бахолдин А.В. Автоматизация расчета объективов типов «склейка с линзой» и «линза со склейкой» // Оптический журнал. 2023. Т. 90. № 1. С. 12–25. http://doi.org/10.17586/1023-5086-2023-90-01-12-25

 

Nguyen D.H., Bakholdin A.V. Сalculation аutomation of “cemented doublet with a singlet” and “singlet with a cemented doublet” objectives [in Russian] // Opticheskii Zhurnal. 2023. V. 90. № 1. P. 12–25. http://doi.org/10.17586/1023-5086-2023-90-01-12-25

For citation (Journal of Optical Technology):

D. H. Nguyen and A. V. Bakholdin, "Calculation automation of “cemented doublet with a singlet” and “singlet with a cemented doublet” objectives," Journal of Optical Technology. 90(1), 6-13 (2023). https://doi.org/10.1364/JOT.90.000006

Abstract:

Subject of study. The automating the synthesis of “cemented doublet with a singlet” and “singlet with a cemented doublet” objectives with an entrance pupil on the first surface of the system. The design of this type of systems is complex due to a large number of possible solutions. Moreover, when changing over from an infinitely thin system to a system with a finite thickness of elements, image quality of the axial point in most cases significantly deteriorates. This feature should be taken into account when developing an algorithm for lens design. Aim of study. Development of a method and algorithm for automatic synthesis of “cemented doublet with a singlet” and “singlet with a cemented doublet” objectives, and development of a ranking system for designed objectives. Study of changes in the axial point image quality of the considered objectives with two or three different materials for possible acceleration of the synthesis process. Method. The initial design of objectives is carried out on the basis of the third-order aberrations theory. An automated exhaustive search is used for ranking all possible combinations of lens materials. Main results. The methodology and algorithm of automatic design of “cemented doublet with a singlet” and “singlet with a cemented doublet” objective have been developed. A ranking system is provided, which ranks designed objectives by the main criterion based on the axial point image size, and by preliminary criterion determining the technological stability of the objective to the manufacturing errors of the optical elements. It is found out that “singlet with a cemented doublet” objectives are generally preferable to “cemented doublet with a singlet” objectives according to the criteria proposed. Based on the calculation results, it is shown that solutions with only two materials can have a slight decrease in the image quality of the axial point. Practical significance. Based on the developed algorithm, the program of automatic design of two- and three-lens objectives is upgraded. The program developed will help an optical engineer to significantly simplify and accelerate the process of design of two- and three-lens objective with the required image quality characteristics.

Keywords:

optical system design, three-lens objective, longitudinal chromatic aberration

OCIS codes: 080.3620, 220.3620, 220.1010

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