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http://dx.doi.org/10.3807/HKH.2009.20.3.148

Athermalized Design of Compact Optical System for Phone Camera  

Park, Sung-Chan (Department of Electro-Physics, Dankook University)
You, Byoung-Taek (Department of Electro-Physics, Dankook University)
Lee, Jong-Ung (Department of Laser and Optical Information Engineering, Cheongju University)
Publication Information
Korean Journal of Optics and Photonics / v.20, no.3, 2009 , pp. 148-155 More about this Journal
Abstract
In this paper, we analysed what effect the design variables, such as refractive index, central thickness and radius of curvature, had on the first order properties and image quality of optical systems when temperature changed. The optical parameters were varied at each temperature, then the coupling and ruler methods were used to design an athermalized lens for a phone camera. This concept was first used to design the lens for a 1/3.2" 5M phone camera. The designed lens satisfies all the specifications for a phone camera, and the variations of the back focal length(${\Delta}BFL$) are reduced to $10{\mu}m$ for a temperature range of $-10^{\circ}C$ to $+60^{\circ}C$. Also, the TTL of 5.5 mm results in a compact system. All design concepts and results discussed in this paper are expected to be useful in development for the phone and CCTV camera.
Keywords
Athermalized optical design; Zoom lens; Phone camera; Optimization; Aberrations;
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