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首页> 外文期刊>Journal of Biophotonics >Wave optical simulation of retinal images in laser safety evaluations
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Wave optical simulation of retinal images in laser safety evaluations

机译:激光安全评估中视网膜图像的波光学模拟

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摘要

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.
机译:波长在可见光和近红外区域的激光会对视力造成潜在危害,因为辐射会聚焦在视网膜上。激光安全标准IEC 60825-1:2014提供了对此类系统进行分类的限制和评估方法。一个重要参数是视网膜光斑大小,它由视在光源的角度子觉来描述。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薄透镜的波光学传播来计算的。对于相干辐射,这种方法可能不够,因为瞳孔的衍射效应会影响视网膜图像。在这篇文章中,我们分析了这些影响,并提出了一种通用的分析计算方法。该公式在准直和发散高斯光束中得到了验证。

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