Method to measure 'optical cooperativity'

The term 'optical cooperativity' describes the fact that surfaces can differ in their ability to being measured using optical instruments (Prof. Dr. Wolfgang Osten). There are many possible causes for optical incooperability depending on which optical measurement equipment is used. The paper describes different causes for optical incooperativity ranging from discontinuities in the object surface over surface gradient up to material properties that impede optical measurement. Main focus points of this paper are the causes for material unsuitability for optical measurement, which are the gloss and volume reflectance. In this paper we describe a way to characterize material gloss and its impact on optical measurement. A quick and easy method is proposed to measure material gloss qualitatively without utilizing complex gonioreflectometric instruments.