Freeform lens design to eliminate retroreflection for optical systems

He Sifeng; Meng Yuan; Gong Mali

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Freeform lens design to eliminate retroreflection for optical systems

机译：Freeform镜头设计，消除光学系统的逆向反射

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This paper presents an effective approach to alleviate the cat-eye effect by inserting a freeform single lens into the original optical system. By shifting the image of the given optical system transversely on the original image plane, the reflected beams originating from the sensor are subsequently blocked by the optical aperture, substantially eliminating retroreflections from the system. The influence of incident angle on retroreflected beams is analyzed in detail, and the optimal image translation distance for completely eliminating the cat-eye effect is also proposed via numerical simulations. According to the translation requirement, a freeform single lens comprised of two different freeform surfaces is designed for the given system as the only translation element. The design recipe is elaborated on the basis of phase pupil function. Furthermore, a design example is demonstrated to verify the feasibility of our proposal. After optimization with optical design software, the modulation transfer function (MTF) of the modified system after translation is close to the diffraction limit, and the cat-eye reflected beam could be eliminated thoroughly. (c) 2018 Optical Society of America

机译：本文通过将自由形式单镜头插入原始光学系统，提出了一种有效的方法来缓解猫眼效果。通过将给定光学系统的图像横向转换在原始图像平面上，源自传感器的反射光束随后被光学孔阻挡，基本上消除了来自系统的逆转录。详细分析了入射角对逆向梁的影响，并通过数值模拟提出了完全消除猫眼效果的最佳图像平移距离。根据翻译要求，设计了由两个不同的自由形状表面组成的自由形式单透镜，用于给定系统作为唯一的翻译元件。在相位瞳孔功能的基础上阐述了设计配方。此外，证明了设计示例以验证我们提案的可行性。在用光学设计软件优化之后，翻译后改进系统的调制传递函数（MTF）接近衍射极限，并且可以彻底地消除猫眼反射光束。（c）2018年光学学会

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来源
《Applied optics》 |2018年第5期|共7页
作者
He Sifeng; Meng Yuan; Gong Mali;
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作者单位

Tsinghua Univ Dept Precis Instruments State Key Lab Precis Measurement Technol &

Instru Beijing 100084 Peoples R China;

Tsinghua Univ Dept Precis Instruments State Key Lab Precis Measurement Technol &

Instru Beijing 100084 Peoples R China;

Tsinghua Univ Dept Precis Instruments State Key Lab Precis Measurement Technol &

Instru Beijing 100084 Peoples R China;

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正文语种 eng
中图分类应用;
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Freeform lens design to eliminate retroreflection for optical systems

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