基于夏克-哈特曼波前传感器的透镜参数测量

IF 3.5 2区 工程技术 Q2 OPTICS Optics and Lasers in Engineering Pub Date : 2024-10-30 DOI:10.1016/j.optlaseng.2024.108666
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引用次数: 0

摘要

焦距、曲率半径和折射率是球面透镜的关键参数。本文提出了一种基于 Shack-Hartmann 波前传感器(SHS)的透镜参数测量方法。首先,测量焦距的参考点位置是由 SHS 微透镜阵列形成的光斑阵列的优点函数确定的,该函数被称为中心点移动的最小平方和(LSSCS)。焦距是通过测量两个球面波的曲率半径来估算的。每个球面波都是由透镜焦点与确定的参照物之间的距离引起的。其次,曲率半径是透镜两个坐标位置之间的差值。每个位置与透镜反射的准直光束相对应,由函数 LSSCS 确定。第三,通过测量焦距和曲率半径,可根据透镜制造商方程进一步估算折射率。利用所提出的方法测试了正透镜和负透镜。实验结果表明,用拟议方法测量的透镜参数与标称值非常吻合。所提出的方法无需波前重建,简单、准确且抗噪。
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Measurement of lens parameters based on Shack-Hartmann wavefront sensor
The focal length, radius of curvature, and refractive index are key parameters of a spherical lens. Here, an approach for measuring lens parameters based on the Shack-Hartmann wavefront sensor (SHS) is proposed. Firstly, the position of the reference point for measuring focal length is determined by the figure-of-merit function, called the least square sum of centroids shifts (LSSCS), from the spot array formed by the microlens array of SHS. The focal length is estimated by measuring radii of curvatures of two spherical waves. Each spherical wave is caused by the distance between the focal point of the lens and the determined reference. Secondly, the radius of curvature is the difference between two coordinate locations of the lens. Each location, corresponding to a collimated beam reflected from the lens, is determined by the figure-of-merit function LSSCS. Thirdly, the refractive index can be further estimated by lens maker's equation through the measured focal length and radius of curvature. A positive and a negative lens are both tested by the proposed method. Experimental results show that the lens parameters measured by the proposed method are in good agreement with the nominal values. The proposed method does not require wavefront reconstruction, and is simple, accurate and noise-resistant.
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来源期刊
Optics and Lasers in Engineering
Optics and Lasers in Engineering 工程技术-光学
CiteScore
8.90
自引率
8.70%
发文量
384
审稿时长
42 days
期刊介绍: Optics and Lasers in Engineering aims at providing an international forum for the interchange of information on the development of optical techniques and laser technology in engineering. Emphasis is placed on contributions targeted at the practical use of methods and devices, the development and enhancement of solutions and new theoretical concepts for experimental methods. Optics and Lasers in Engineering reflects the main areas in which optical methods are being used and developed for an engineering environment. Manuscripts should offer clear evidence of novelty and significance. Papers focusing on parameter optimization or computational issues are not suitable. Similarly, papers focussed on an application rather than the optical method fall outside the journal''s scope. The scope of the journal is defined to include the following: -Optical Metrology- Optical Methods for 3D visualization and virtual engineering- Optical Techniques for Microsystems- Imaging, Microscopy and Adaptive Optics- Computational Imaging- Laser methods in manufacturing- Integrated optical and photonic sensors- Optics and Photonics in Life Science- Hyperspectral and spectroscopic methods- Infrared and Terahertz techniques
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