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Geometrical-based quasi-aspheric surface description and design method for miniature, low-distortion, wide-angle camera lens

圆锥截面 失真(音乐) 镜头(地质) 非成像光学 计算机科学 代表(政治) 光学 曲面(拓扑) 过程(计算) 照相机镜头 自由度(物理和化学) 功能(生物学) 数学 几何学 物理 政治 生物 进化生物学 量子力学 操作系统 计算机网络 放大器 法学 带宽(计算) 政治学
作者
Zhenfeng Zhuang,Xavier Dallaire,Jocelyn Parent,Patrice Roulet,Simon Thibault
出处
期刊:Applied Optics [Optica Publishing Group]
卷期号:59 (27): 8408-8408 被引量:8
标识
DOI:10.1364/ao.400528
摘要

In addition to utilizing traditional aspheric surfaces, complicated geometric curves for meeting stringent design requirements can also be adopted in optical systems. In this paper, we investigate two geometric shape modeling schemes, namely, pedal and cosine curves, which allow for representation of an S-shaped profile for the optical design of a camera lens. To obtain a powerful tool for representing a quasi-aspheric surface (QAS) to resemble the designed form surface, we linearly combine the pedal/cosine function with a base conic section. The detailed parameterization process of representation is discussed in this paper. Subsequently, an existing starting point that has similar specifications to that of the design requirements is selected. During the optimization process, a least-squares fitting algorithm is implemented to obtain the optimal coefficient values of the proposed QAS representation, and then the parameters (radii, air thickness, lens thickness, coefficients, materials, etc.) of the optical system are set to optimize the optical performance, gradually aiming to minimize the predefined merit function. We demonstrate the applicability of the proposed geometric modeling schemes via two design examples. In comparison to a conventional aspheric camera lens of the same specifications, the optical performance with respect to field of view and distortion has been improved due to higher degrees of design freedom. We believe that the proposed technology of geometric modeling schemes promises to improve optical performance due to these higher degrees of freedom and appears to be applicable to many different camera lenses.
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