H Jänchen et al 1996 Pure Appl. Opt. 5 405 doi:10.1088/0963-9659/5/4/007
Determination of the refractive indices of highly biaxial anisotropic coatings using guided modes
H Jänchen
, D Endelema
, N Kaiser and F Flory
Precise determination of the main refractive indices of biaxial anisotropic coatings is essential for the calculation of their optical performance. Earlier measurements based on wave guiding methods have proved to yield excellent results with obliquely deposited and hence anisotropic layers, deposited under an angle of 
or less. But with higher deposition angles, new problems arise due to the less defined microstructure and the increasing influence of the accuracy of the column inclination angle on the resulting indices. In a theoretical study, these effects are shown to limit the precision of the method. Experimental results at 
on 
coatings, deposited at angles of 
, 
, 
and 
, are given. All three main refractive indices were found to decrease with an increasing deposition angle, while anisotropy increases almost linearly.
- Dates
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Issue 4 (July 1996)
Received 22 January 1996
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Determination of the refractive indices of highly biaxial anisotropic coatings using guided modes
H Jänchen et al 1996 Pure Appl. Opt. 5 405
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