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http://dx.doi.org/10.3807/KJOP.2020.31.2.096

Design and Performance of a Catadioptric Omnidirectional Zoom Optical System Using a Hybrid Lens for Visible Light  

Park, Hyun Sik (Department of Photonics and Sensors, Graduate School, Hannam University)
Jo, Jae Heung (Department of Photonics and Sensors, Graduate School, Hannam University)
Publication Information
Korean Journal of Optics and Photonics / v.31, no.2, 2020 , pp. 96-104 More about this Journal
Abstract
A catadioptric omnidirectional zoom optical system using a hybrid lens (COZOSH) that performs simultaneously two functions of a lens and a mirror was designed at the visible wavelength range for daytime unmanned surveillance, and its performance was analyzed. The hybrid lens has lots of advantages in terms of fabrication and assembly of a COZOSH, because of the obviation of a lens boring process and reduction of the number of optical components. Additionally, we designed the COZOSH to expand the compressed inner-image region of a donut image at low spatial frequencies. As a result, the optimized design performance of the optical system that satisfies all initial design specifications was obtained from calculation of the modulation transfer function, spot diagram, and tolerance analysis. We confirmed that the COZOSH is a passively athermalized optical system under conditions of temperature variation from -30℃ to 50℃, by using athermalization analysis during zooming.
Keywords
Lens design; Omnidirectional zoom optical system; Hybrid lens; Catadioptric imaging system;
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Times Cited By KSCI : 3  (Citation Analysis)
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