Open AccessField curvature correction in video endoscope lenses through the parameters of air meniscus
Author(s) -
A. V. Kryukov,
S.V. Yakubovskiy
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2127/1/012069
Subject(s) - lens (geology) , curvature , optics , meniscus , coma (optics) , distortion (music) , focal length , radius of curvature , field (mathematics) , field of view , computer science , physics , mathematics , geometry , optoelectronics , mean curvature , amplifier , incidence (geometry) , cmos , pure mathematics , mean curvature flow
The research presents a method to synthesize lens data of an air meniscus built into the optical layout and acting as a correction element that fixes the field curvature of the entire optical system. The practical application of the proposed method is relevant when creating miniature lenses for medical video endoscopes when a small number of lenses and a flat image field for a CCD/CMOS sensor are important. Analytical dependencies for the lens data of the air meniscus are obtained and significant conditions for the field curvature correction are formed. A numerical example of a front stop lens design is demonstrated and confirms the correctness of the formulated conditions. A comparison of the aberration values of the original lens and an upgraded system is carried out. It is shown that, the values of the field curvature and astigmatism have been compensated as a result of introducing the synthesized parameters of the air meniscus into the optical layout. The correction is achieved while keeping the values of coma, distortion, focal length, and optical system total length at the level of the initial values.