Wave optical simulation of retinal images in laser safety evaluations,Journal of Biophotonics

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Wave optical simulation of retinal images in laser safety evaluations
Journal of Biophotonics ( IF 2.0 ) Pub Date : 2020-11-14 , DOI: 10.1002/jbio.202000339
Sebastian Kotzur _{1,

2} , Siegfried Wahl _{2,

3} , Annette Frederiksen ₄

Affiliation

Lasers with wavelengths in the visible and near infrared region, pose a potential hazard to vision as the radiation can be focused on the retina. The laser safety standard IEC 60825–1:2014 provides limits and evaluation methods to perform a classification for such systems. An important parameter is the retinal spot size which is described by the angular subtense of the apparent source. In laser safety evaluations, the radiation is often described as a Gaussian beam and the image on the retina is calculated using the wave optical propagation through a thin lens. For coherent radiation, this method can be insufficient as the diffraction effects of the pupil aperture influence the retinal image. In this publication, we analyze these effects and propose a general analytical calculation method for the angular subtense. The proposed formula is validated for collimated and divergent Gaussian beams.

中文翻译：

激光安全性评估中视网膜图像的波光学模拟

波长在可见光和近红外区域的激光会对辐射造成潜在的危害，因为辐射可以聚焦在视网膜上。激光安全标准IEC 60825–1：2014提供了限制和评估方法，可以对此类系统进行分类。一个重要的参数是视网膜斑点的大小，它由视在来源的角度对向来描述。在激光安全性评估中，辐射通常被描述为高斯光束，而视网膜上的图像是通过穿过薄透镜的光波传播来计算的。对于相干辐射，此方法可能不足够，因为瞳孔孔径的衍射效应会影响视网膜图像。在本出版物中，我们分析了这些影响，并提出了对角对接的通用分析计算方法。

更新日期：2020-11-14

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