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Monolithischer dielektrischer Spiegel

Monolithic mirror for e.g. polarization-based filter, has middle layer including periodic structure made of base material, where structure has effective refractive index less than refractive index of base material
 
: Kley, E.-B.; Brückner, F.; Clausnitzer, T.

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Frontpage ()

DE 102007047681 A: 20071005
DE 102007047681 A: 20071005
G02B0005
G02B0001
G02B0027
G03F0007
German
Patent
Fraunhofer IOF ()

Abstract
(A1) Die vorliegende Erfindung betrifft eine reflektierende Oberflaeche, die monolithisch, vorzugsweise aus einem dielektrischen Material, hergestellt ist. Durch eine periodische Subwellenlaengen-Strukturierung kann die Reflektivitaet gezielt polarisationsselektiv kontrolliert werden. Bei geeigneter Ausgestaltung kann fuer diese monolithische Oberflaeche bei senkrechtem Einfall von elektromagnetischer Strahlung aus der Luft eine Reflektivitaet von 100% erreicht werden.

 

DE 102007047681 A1 UPAB: 20090514 NOVELTY - The mirror has an upper layer (1), a middle layer (2) and a lower layer (3), where the layers are monolithic and are arranged on top of each other with parallel layer planes. The middle layer is defined on the upper layer, and the lower layer is defined on the middle layer. The lower and upper layers comprise or are made of a base material that is a dielectric and is transparent for light of preset wavelength. The middle layer has a periodic structure i.e. grating, made of the base material, where the structure has an effective refractive index less than refractive index of the base material. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for manufacturing a mirror. USE - Monolithic mirror for a polarization-based filter or beam splitter and a polarization-independent filter or beam splitter (all claimed). ADVANTAGE - The mirror can be manufactured in a simple and cost-effective manner. The mirror does not have abutting layers made of different materials, thus avoiding thermal mismatching and mechanical stresses in a substrate of the mirror. The mirror has monolithic surface area including 100 percent reflectivity for preset wavelengths.

: http://publica.fraunhofer.de/documents/N-95840.html