Effect of surface degradation on optical performance of potassium dihydrogen phosphate optics.
Effect of surface degradation on optical performance of potassium dihydrogen phosphate optics.
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DOI：
10.1364/ao.42.005545
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发表时间：
2003-09
期刊：
影响因子：
1.9
通讯作者：
E. Wheeler;R. Fluck;B. Woods;P. Whitman
中科院分区：
文献类型：
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作者：
E. Wheeler;R. Fluck;B. Woods;P. Whitman
我们已经测量了裸露的磷酸二氢钾（KDP）表面粗糙化和表面降解（蚀坑），开发下的多孔溶胶-凝胶涂层暴露于环境相对湿度后产生的散射。在涂覆的KDP上形成的蚀刻坑将入射光散射成具有缺陷尺寸和形状特征的强烈各向异性角分布。总积分散射（TIS）可以高达9%的晶体与蚀刻坑相比，0.05%的制造晶体。TIS的量与通过光学显微镜测量的被缺陷遮蔽的区域相关。
We have measured scatter produced by roughening of bare potassium dihydrogen phosphate (KDP) surfaces and by surface degradation (etch pits) that develop beneath a porous solgel coating on KDP after exposure to ambient relative humidity. The etch pits that form on coated KDP scatter incident light into strongly anisotropic angular distributions characteristic of the defect size and shape. The total integrated scatter (TIS) can be as high as 9% for a crystal with etch pits as compared with 0.05% for the as-manufactured crystal. The amount of TIS correlates with the area obscured by defects as measured by optical microscopy.