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首页> 外文期刊>Journal of vision >The effect of aberrations on objectively assessed image quality and depth of focusdel águila-Carrasco, Read, Montés-Micó, & Iskander
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The effect of aberrations on objectively assessed image quality and depth of focusdel águila-Carrasco, Read, Montés-Micó, & Iskander

机译：像差对客观评估的图像质量和focusdeláguila-Carrasco，Read，Montés-Micó和Iskander的深度的影响

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摘要

The effects of aberrations on image quality and the objectively assessed depth of focus (DoF) were studied. Aberrometry data from 80 young subjects with a range of refractive errors was used for computing the visual Strehl ratio based on the optical transfer function (VSOTF), and then, through-focus simulations were performed in order to calculate the objective DoF (using two different relative thresholds of 50% and 80%; and two different pupil diameters) and the image quality (the peak VSOTF). Both lower order astigmatism and higher order aberration (HOA) terms up to the fifth radial order were considered. The results revealed that, of the HOAs, the comatic terms (third and fifth order) explained most of the variations of the DoF and the image quality in this population of subjects. Furthermore, computer simulations demonstrated that the removal of these terms also had a significant impact on both DoF and the peak VSOTF. Knowledge about the relationship between aberrations, DoF, image quality, and their interactions is essential in optical designs aiming to produce large values of DoF while maintaining an acceptable level of image quality. Comatic aberration terms appear to contribute strongly towards the configuration of both of these visually important parameters.
机译：研究了像差对图像质量和客观评估的景深（DoF）的影响。使用来自80位具有屈光不正范围的年轻受试者的像差数据，基于光学传递函数（VSOTF）来计算视觉Strehl比，然后进行全焦点模拟以计算客观DoF（使用两个不同的相对阈值分别为50％和80％;以及两个不同的瞳孔直径）和图像质量（峰值VSOTF）。低阶像散和高阶像差（HOA）项均被考虑到第五个径向阶。结果表明，在HOA中，彗星术语（三阶和五阶）解释了该人群中DoF和图像质量的大部分变化。此外，计算机模拟表明，删除这些术语也对DoF和峰值VSOTF产生了重大影响。关于像差，DoF，图像质量及其相互作用之间的关系的知识对于旨在产生较大DoF值同时保持可接受的图像质量水平的光学设计至关重要。彗形像差术语似乎对这两个视觉上重要参数的配置有很大贡献。

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