公开(公告)号：US20020118460A1

公开(公告)日：2002-08-29

申请号：US09793330

申请日：2001-02-26

Applicant: General Atomics

Inventor： Lawrence Donald Woolf ,  Kirk Patrick Norton

IPC: G02B027/00 ,  G02B001/10

CPC classification number: G02B1/14 ,  C03C17/36 ,  C03C17/361 ,  C03C17/3639 ,  C03C17/3649 ,  C03C2217/948 ,  G02B1/10

Abstract: A one-way imaging optical film is provided by a transparent polymer substrate bearing a first coating defining an image area and a second coating defining a background or surround area. In the visible light spectrum, the two coatings have very similar light transmittance characteristics and very similar reverse reflectance characteristics, but different reflectance characteristics such that when the film is viewed from the coated side the image area is visually distinct from the surround area, and when the film is viewed from the substrate side, the film is transparent and the image virtually non-discernible. The film has a visible light transmittance of at least about 25 percent for use especially as an architectural and vehicle window film.

Abstract translation: 单向成像光学膜由承载限定图像区域的第一涂层和限定背景或环绕区域的第二涂层的透明聚合物基板提供。 在可见光光谱中，两个涂层具有非常相似的透光率特性和非常相似的反向反射特性，但反射特性不同，使得当从涂覆侧观察膜时，图像区域在视觉上与环绕区域不同，并且当 从基板侧观察膜，膜是透明的，并且图像实际上是不可辨别的。 该膜具有至少约25％的可见光透射率，特别用作建筑和车辆窗膜。