| 摘要 |
The present invention provides an optical coating structure (10) applied to the surface of an object. “Scattering structures” are introduced to the basal, upper or middle layers of a multilayer reflector to cause a particular (calculated) degree of scattering, or to the surface of a black/color pigmented object to cause either enhanced transmission at the environment-object interface or omni-directional (as opposed to directional) reflections of which only a narrow portion can be observed. The scattering structures are mainly sub-micron in size, and arranged in a pseudo-random or non-periodic manner so as to prevent significant diffraction by themselves. Consequently they serve only to broaden the angular range of the light reflected at the surface normal from a multilayer reflector, or to provide (actual and/or perceived) reduced reflectivity of a surface by deflecting incident light through the surface rather than away from it or by scattering otherwise beam-like (narrow-angle) reflections from a surface into a broad-angle reflection. The scattering structures may comprise profile elements (12), which are in the form of elongate bars having convexly curved sides or hemispherical rods, that are introduced to a basal layer of a multilayer reflector. The layers of the multilayer reflector follow the convex curve of the bars or rods to form a distorted reflector structure. |
