含偶次非球面的手机镜头降敏设计方法

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关键词：节点像差理论;降敏设计；非球面；手机镜头

中图分类号：TB133 文献标识码：A

doi：10.37188/OPE.20263402.0191 CSTR：32169.14.OPE.20263402.0191

Desensitization design method for mobile phone lens with even aspheric surfaces

WANG Yang1，WANG Chuwen1，GU Zhiyuan2

（1. College of Optoelectronic Engineering， Changchun Uniuersity of Science and Technology ， Changchun 130022， China;

2. Changchun Institute of Optics， Fine Mechanics and Physics， Chinese Academy of Sciences， Changchun130031，China） * Corresponding author， E -mail： zhiyuan. gu@hotmail.com

Abstract： In the optical design process，the optimization of optical system performance and tolerance analysis are often treated separately. A system with excellent theoretical performance may have excessively tight tolerance. Therefore，the desensitization of the optical system is crucial during the system design process.The even aspheric surfaces are commonly used in the mobile phone lens to reduce aberrations and totaltrack length. However，the introduction of high-order terms can lead to significant image quality degradation caused by the misalignments.A desensitization design method based on nodal aberration theory was proposed in this paper to desensitize mobile phone lenses with even aspheric surfaces .First， based on nodal aberration theory，the variations in Zernike coeficients for third-order coma and astigmatism were analyzed for the conic surface base of the misaligned even aspheric surfaces.Then，in order to calculate the variation in wavefront error introduced by the higher-order terms，a transformation of the pupil coordinates was used to obtain the pupil map of the optical surface under misalignments.Based on the coordinate transformation in the pupil map，the variation in wavefront error was then calculated. Finaly，an as-built per formance model suitable for optical systems with even aspheric surfaces was established，which was then used to design a 4-element mobile phone lens. The tolerance analysis showed that after 3O minutes of optimization and under 5μm decenter and 5′ tilt tolerance，the mean RMS wavefront error of the mobile phone lens was reduced by 33% compared to the default design method，which verifies the effectiveness of the proposed design method in the paper.

Key Words： nodal aberration theory；desensitization design；aspheric surface;mobile phone lens

1引言

随着移动影像技术的快速发展[1-4]，手机镜头凭借其体积小、成本低的优势，在许多领域逐渐取代了传统摄像机。（剩余11464字）