Athermal design and analysis of glass-plastic hybrid lens

Jian Yang; Zhaofeng Cen; Xiaotong Li

doi:10.1117/12.2287680

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10 January 2018 Athermal design and analysis of glass-plastic hybrid lens

Jian Yang, Zhaofeng Cen, Xiaotong Li

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Proceedings Volume 10616, 2017 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments; 106160H (2018) https://doi.org/10.1117/12.2287680
Event: International Conference on Optical Instruments and Technology 2017, 2017, Beijing, China

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.

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Jian Yang, Zhaofeng Cen, and Xiaotong Li "Athermal design and analysis of glass-plastic hybrid lens", Proc. SPIE 10616, 2017 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments, 106160H (10 January 2018); https://doi.org/10.1117/12.2287680

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KEYWORDS

Glasses

Aspheric lenses

Lens design

Plastic lenses

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