Inner Focusing Lens
- Authors: Shishkin I.P.1, Shkadarevich A.P.1
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Affiliations:
- NTC “LEMT” BeloMO
- Issue: Vol 19, No 3 (2025)
- Pages: 224-231
- Section: Optical Devices & Systems
- URL: https://journals.eco-vector.com/1993-7296/article/view/682916
- DOI: https://doi.org/10.22184/1993-7296.FRos.2025.19.3.224.231
- ID: 682916
Cite item
Abstract
The article describes the design of inner focusing lenses. Lenses can be used in surveillance devices, night vision devices, for application in machine vision systems, in photography and other fields. Wide-angle lens with a focal length of 16 mm and an aperture of F / 1.8, fast lens with a focal length of 26 mm and an aperture of F / 1.2, lens with a focal length of 50 mm and an aperture of F / 1.4, lens with a focal length of 100 mm and an aperture of F / 2.8, telephoto lens with a focal length of 200 mm and an aperture of F / 4, as well as for comparison a lens with a variable focal length of 10–300 mm and an aperture of F / 1.6–4.5.
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About the authors
Igor P. Shishkin
NTC “LEMT” BeloMO
Author for correspondence.
Email: shipoflens@mail.ru
ORCID iD: 0000-0002-4592-1060
Cand. of Tech. Sciences
Belarus, MinskAlexey P. Shkadarevich
NTC “LEMT” BeloMO
Email: shipoflens@mail.ru
Dr. of Tech. Sciences
Belarus, MinskReferences
- Choi and J. Ryu. Design of wide angle and large aperture optical system with inner focus for compact system camera applications. Appl. Sci. 2020;10:179.
- US Patent 2017/0293117, 2017.10.12 Wide-angle lens and imaging unit. / K. Katou et al.
- DE Patent 102015112992, 2016.09.01. Fotografisches Weitwinkelobjektiv mit Innenfokussierung. /Shyshkin I.
- DE Patent 102014103935, 2015.09.24. Fotografisches Objektiv. / Shyshkin I.
- WO Patent 2015106908., 2015.07.23. Photographic lens. / Wang L., Shyshkin I.
- US Patent 2014347743, 2014.11.27. Photographic wide angle lens system with internal focusing / Wang L., Shyshkin I.
- Park S. C., Lee W. S. Paraxial design method based on an analytic calculation and its application to a three-group inner-focus zoom system. J. Korean Phys. Soc. 2014;64:1671–1676.
- US Patent 8503096, 2013.08.06. Inner focus lens, interchangeable lens apparatus and camera system /Imaoka T., Hoshi K., Hagimori H.
- US Patent 2005/0248857, 2005.11.10. Large aperture ratio internal focusing telephoto lens / Wada M.
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