PROBLEM TO BE SOLVED: To provide a radio wave transmission type cover which realizes a metal texture while maintaining radio wave transmission properties and capable of manufacturing by more inexpensive materials.SOLUTION: A radio wave transmission cover having a metallic luster and installed on a front grill of an automobile to allow a radar radio wave to transmit there-through includes: a transparent resin layer 10 exposed to a front surface of the front grill; a metal texture layer 100a formed behind the resin layer 10 and constituted of a multilayer optical film layer 30a and a germanium layer 40a alternately laminated with metal oxides having mutually different refractivity; and an opaque layer 50 formed behind of the metal texture layer 100a and enhancing a reflectance of the metal texture layer 100a. The multilayer optical film layer 30a is formed by mutually laminating a high-refraction index layer and a low-refraction index layer, and the layer closet to the resin layer 10 is the high-reflection index layer in the layer which constitutes the multilayer optical film layer 30a.SELECTED DRAWING: Figure 2

    【課題】電波透過性を維持しながら金属質感を実現し、より安価な材料で製造することができる電波透過型カバーを提供する。【解決手段】自動車のフロントグリルに設置されてレーダー電波を透過させる、金属光沢を有する電波透過型カバーは、前記フロントグリルの前方表面に晒される透明なレジン層10、前記レジン層10の後方に形成され、互いに異なる屈折率を有する金属酸化物が交互に積層された多層光学膜層30aとゲルマニウム層40aから構成される金属質感層100a、および前記金属質感層100aの後方に形成され、前記金属質感層100aの反射率を向上させる不透明層50を含む。前記多層光学膜層30aは、高屈折率層と、低屈折率層とを交互に積層して構成され、前記多層光学膜層30aを構成する層のうち前記レジン層10に最も近い層は、高屈折率層であることを特徴とする。【選択図】図2


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    Title :

    RADIOWAVE TRANSMISSION TYPE COVER HAVING METALLIC LUSTER


    Additional title:

    金属光沢を有する電波透過型カバー


    Contributors:

    Publication date :

    2017-06-15


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    G01S RADIO DIRECTION-FINDING , Funkpeilung / B32B LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM , Schichtkörper, d.h. aus Ebenen oder gewölbten Schichten, z.B. mit zell- oder wabenförmiger Form, aufgebaute Erzeugnisse / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / H01Q Antennen , ANTENNAS, i.e. RADIO AERIALS



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