FOUR-COMPONENT AFOCAL LENS SYSTEMS
DOI:
https://doi.org/10.20535/kpi-sn.2019.5-6.188314Keywords:
Zoom-afocal lens system, Parametric synthesis of zoom-afocal lens systemsAbstract
Background. Parametric synthesis of zoom-afocal optical systems for zoom-lens. Algorithm for the overall calculation of the four-component zoom-afocal systems, which provides overall limitations, the desired range of variation of the angular magnification and the field of view of the zoom-lens, the permissible vignetting of the beam beams in the entire range of angular magnification. Synthesis of afocal systems for a stationary lens, the entrance pupil of which is located behind the afocal system.
Objective. Development of a universal analytical algorithm suitable for computer automation for calculating the optical and overall parameters of the components of four-component zoom-afocal systems.
Methods. The zoom-afocal system is represented by subtle components. A system of equations is compiled in which the distances between the components are unknown. From the equations, the values of these distances are recovered, which provide the necessary values of the angular magnification and zero optical power of the afocal system. In this case, the magnitudes of the optical powers of the components and their ratios should ensure positive values of the distances between them. Using the formulas of the angles and heights of the zero rays on the components of the system, taking into account the permissible vignetting of the beam of rays from the edge of the field of view, the required light diameters of the components are determined.
Results. Analytical dependences are obtained that allow one to determine the optical powers of the components and their relative position in the entire range of the desired change in angular magnification from the initial data. It is shown that the first component has the largest light diameter when the largest value of the angular increase in a given range is achieved.
Conclusions. The results obtained make it possible to carry out in an analytical form a parametric synthesis of four-component zoom-afocal systems, taking into account the requirements for their dimensions, field of view, the range of variation of the angular increase and the permissible vignetting of the beam of rays from the edge of the field of view.References
I.H. Chyzh and K.S. Lysnyak, “Three-component lens zoom-afocal systems for transfocators”, KPI Science News, no. 3, pp. 73–79, 2019. doi: 10.20535/kpi-sn.2019.3.175737
A. Hoegele and J. Winterot, “Afocal zoom lenses and their applications”, in Proc. SPIE Optical Engineering + Applications, San Diego, California, 2012. doi: 10.1117/12.928849
V.N. Churilovsky, Theory of Optical Devices. Leningrad, SU: Mashinostroienie, 1966, 564 p.
E.O. Ulyanova, “Optical system with two fields of view for thermal imaging devices based on the array photoreceivers”, Applied Physics, no. 3, pp. 91–94, 2012.
M.S. Yeh et al., “First-order analysis of a three-lens afocal zoom system”, Optical Engineering, vol. 36, no. 4, pp. 1249–1258, 1997. doi: 10.1117/1.601245
D.G. Norrie, “Refractingafocal systems in thermal imagers”, Optical Engineering, vol. 25, no. 2, 1986.
J. Zhang et al., “Paraxial analysis of double-sided telecentric zoom lenses with three components”, Applied Optics, vol. 53, no. 22, pp. 4957–4967, 2014. doi: 10.1364/ao.53.004957
V.G. Pospekhov et al., “Studies relating to design of pancratic constant-length objective for digital photo camera”, Herald of the Bauman Moscow State Technical University. Series Instrument Engineering, no. 4, pp. 27–38, 2010.
N. Van Luyen, “Pancratic telescopic system design automation”, Journal of Optical Technology, no. 12, pp. 22–25, 2013.
A. Miks and J. Novak, “Paraxial analysis of four-component zoom lens with fixed distance between focal points”, Applied Optics, vol. 51, no. 21, pp. 5231–5235, 2012. doi: 10.1364/ao.51.005231
I.I. Pakhomov et al., “Automated dimensional calculation of zoom lenses”, Herald of the Bauman Moscow State Technical University. Series Instrument Engineering, no. 3, pp. 26–41, 2010.
S.V. Oleinik and T.N. Khatsevich, “Development of an optical system with discret change of focal length”, Journal of Instrument Engineering, no. 6, pp. 58–62, 2009.
A. Mann, Infrared Optics and Zoom Lenses, 2nd ed. SPIE, 2009.
B.N. Begunov et al., Theory of Optical Systems. Leningrad, SU: Mashinostroienie, 1981, 432 p.
Downloads
Published
Issue
Section
License
Copyright (c) 2019 The Author(s)
This work is licensed under a Creative Commons Attribution 4.0 International License.
Authors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under CC BY 4.0 that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work
