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Optical control for solar mirrors
Optics and Lasers in Engineering ( IF 4.6 ) Pub Date : 2021-10-09 , DOI: 10.1016/j.optlaseng.2021.106835
D. Fontani 1 , P. Sansoni 1 , F. Francini 1 , D. Jafrancesco 1
Affiliation  

Concentrated power on the receiver and homogeneity of irradiance distribution are optimised in the optical design of solar mirrors. However, the manufactured mirror may contain some fabrication defects, which alter the irradiance distribution on the receiver. Surface defects introduce aberrations that cause an enlarged spot on the receiver and the resulting energetic losses depend on the collection features of each solar plant. To minimise these losses, it is essential to control the surface curvature, especially on large solar reflectors like heliostats. Facility of application, low-cost equipment, and elaboration simplicity are the key advantages of the proposed optical control. Exploiting techniques of image analysis, it assesses the mirror surface quality comparing an acquired image with a reference image. The application requires only a photographic camera and a screen with a calibrated pattern. The surface defects of the reflecting surface appear as deformations in the image of the pattern. This optical measurement could be adapted to examine mirrors with various shapes and sizes. It is an optical control that can be applied during manufacturing of the mirrors or on the produced samples.



中文翻译:

太阳镜的光学控制

在太阳镜的光学设计中优化了接收器上的集中功率和辐照度分布的均匀性。然而,制造的镜子可能包含一些制造缺陷,这些缺陷会改变接收器上的辐照度分布。表面缺陷会引入像差,导致接收器上的光斑扩大,由此产生的能量损失取决于每个太阳能发电厂的收集特性。为了最大限度地减少这些损失,必须控制表面曲率,尤其是在大型太阳能反射器(如定日镜)上。应用的便利、低成本的设备和加工简单是所提出的光学控制的主要优点。利用图像分析技术,它评估镜面质量,将获取的图像与参考图像进行比较。该应用程序只需要一个照相机和一个带有校准图案的屏幕。反射面的表面缺陷表现为图案图像中的变形。这种光学测量可适用于检查各种形状和尺寸的镜子。它是一种光学控制,可以在镜子制造过程中或在生产的样品上应用。

更新日期:2021-10-09
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