Measuring instrument and method for determination of the properties of an item and its surface

Abstract

A measurement device for the determination of the characteristics of the object's surface by means of the optical radiation, wherein a measurement device comprises an optical radiation source and a detector to receive the radiation reflected from the surface being measured. In addition, a measurement device comprises an emitted optical radiation processing unit, which is adjusted to split optical radiation emitted by an optical source into separate wavelengths and to direct said separate wavelengths to the object being measured in a direction, that differs from the normal of the surface being measured so, that at least the shortest and the longest wavelengths of said wavelengths are focused on different halves and different heights of the measured object's surface, in the direction of the normal of the surface being measured. In addition, a measurement device comprises a reflected optical radiation processing unit, which is adjusted to receive an optical radiation reflected from the measured object at least in the direction of a specular reflection, which differs from the normal of the surface being measured, and to direct received optical radiation to said detector. Still further, the measurement device is adjusted to analyze an electric signal produced by the detector and proportional to the intensity of the radiation focused thereto, and to further determine a surface gloss (gloss degree) and/or thickness characteristic property of the measured object, based on the intensity of its wavelength, the focus point of which was located on the measured surface, and which wavelength was the strongest reflected from that point to the detector in the specular geometry.