Substrate effects on absorption of coated surfaces

被引：18

作者：

Roche, P

Commandre, M

Escoubas, L

Borgogno, JP

Albrand, G

Lazarides, B

机构：

[1] Laboratoire d’Optique des Surfaces et des Couches Minces, Unité Associée au Centre National de la Recherche Scientifique, Ecole Nationale Supérieure de Physique de Marseille, Domaine Universitaire de St. Jéräme, Marseille, 13397

来源：

APPLIED OPTICS | 1996年 / 35卷 / 25期

关键词：

optical coatings; absorption mapping; surface contamination; interface absorption; substrate absorption;

D O I：

10.1364/AO.35.005059

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Photothermal deflection is used for mapping the absorption of bare and coated surfaces. The same area is mapped before and after coating and also after annealing. The great importance of the substrate with respect to the total losses of the coated component is emphasized. First the influence of surface contamination of the bare substrate on the total absorption of the coated substrate is studied for BK7 and fused-silica substrates. Then the mean value of the coated-substrate absorptance is shown to be strongly dependent on the type of substrate. Experimental results show that this effect is associated with a localization of the absorption at the near surface of the substrate and at the interfaces of the film. (C) 1996 Optical Society of America

引用

页码：5059 / 5066

页数：8

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