Patent ID: 7391518
Filing Date: 2008-06-24
Classification: G01B,G01J,G01N

Abstract:
1. A device for making quantified determinations of characteristic parameters of a surface, the characteristic parameters being selected from the group of gloss, haze, and distinctness of image, comprising: at least one optical system having: a light diode emitting an emitted light at the surface so that said emitted light hits the surface at a predetermined angle of incidence, said emitted light having a light intensity over the entire visible spectral range; a lens parallelizing said emitted light before said emitted light hits the surface; at least one photo sensor receiving a reflected light from the surface at a predetermined angle of reflection, said photo sensor generating a signal based on said reflected light, wherein said predetermined angle of incidence and said predetermined angle of reflection are mirror symmetrical to each other with respect to a normal to the surface; filter means arranged in a light path between said light diode and said at least one photo sensor and for adapting a spectrum such that an aggregate spectrum of said light diode, said at least one photo sensor, and said filter means corresponds to an aggregate of daylight spectrum and eye sensitivity; a lens for focusing said reflected light into a light beam, wherein said light beam impinges on said at least one photo sensor; and evaluation means for determining the gloss, haze, and distinctness of image of the surface based on said signal, said signal corresponding to portions of said reflected light, wherein said at least one optical system comprises three optical systems, and wherein said predetermined angle of incidence and reflection is different for each of said three optical systems.