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Coating design contest. Antireflection coating for lenses to be used with normal and infrared photographic film

: Schallenberg, U.

Guenther, K.H.:
Thin films for optical systems : Tagung 14-18 September 1992, Berlin
Bellingham, Wash.: SPIE, 1993 (Europto series)
ISBN: 0-8194-0961-8
Conference Thin Films for Optical Systems <1992, Berlin>
Conference Paper
Fraunhofer IOF ()
AR-Belag; AR coating; Dünnschichtdesign; thin film design

The solution of the coating design problem was obtained with a conventional multilayer system of 8 layers: 7 alternating TiO2/Ai2O3-layers beginning on the substrate and one layer of MgF2, as the putermost layer. The Merit-function is 0.00409 and even the s-polarization of reflection at 30 is smaller than 1 per cent within the spectral range from 400 to 900 nm. The final system is based on start-system of 5/4-layers, which was modificated step by step for getting the necessary spectral bandwidth under the conditions of the given refractive indices, the refractive index dispersion, and the oblique indice of light.