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Proceedings Paper

Athermal design and analysis of glass-plastic hybrid lens
Author(s): Jian Yang; Zhaofeng Cen; Xiaotong Li
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Paper Abstract

With the rapid development of security market, the glass-plastic hybrid lens has gradually become a choice for the special requirements like high imaging quality in a wide temperature range and low cost. The reduction of spherical aberration is achieved by using aspherical surface instead of increasing the number of lenses. Obviously, plastic aspherical lens plays a great role in the cost reduction. However, the hybrid lens has a priority issue, which is the large thermal coefficient of expansion of plastic, causing focus shift and seriously affecting the imaging quality, so the hybrid lens is highly sensitive to the change of temperature. To ensure the system operates normally in a wide temperature range, it is necessary to eliminate the influence of temperature on the hybrid lens system. A practical design method named the Athermal Material Map is summarized and verified by an athermal design example according to the design index. It includes the distribution of optical power and selection of glass or plastic. The design result shows that the optical system has excellent imaging quality at a wide temperature range from -20 ℃ to 70 ℃. The method of athermal design in this paper has generality which could apply to optical system with plastic aspherical surface.

Paper Details

Date Published: 10 January 2018
PDF: 6 pages
Proc. SPIE 10616, 2017 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments, 106160H (10 January 2018); doi: 10.1117/12.2287680
Show Author Affiliations
Jian Yang, Zhejiang Univ. (China)
Zhaofeng Cen, Zhejiang Univ. (China)
Xiaotong Li, Zhejiang Univ. (China)


Published in SPIE Proceedings Vol. 10616:
2017 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments
Yongtian Wang; Baohua Jia; Kimio Tatsuno; Liquan Dong, Editor(s)

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