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

A method for determining one or more characteristics of an object by means of optical radiation, comprising:

• emitting the optical radiation by a source of the optical radiation to the object being measured, and
• receiving the radiation, reflected from the object being measured, by a detector, and
• generating an electric signal proportional to the reflected radiation intensity,
• characterized in that
• additionally in the method
• an optical radiation emitted by the source of the optical radiation is split to various wavelengths that are directed to the measured object in a direction that differs from a normal direction of a measured surface so that at least a shortest said wavelength and a longest said wavelength of said emitted optical radiation are focused on different depths in the normal direction of the surface being measured,
• an optical radiation, reflected from the measured object, is received, at least, from a direction of a specular reflection, that differs from the normal direction of the surface being measured, and said optical radiation is directed to the detector, and
• an electric signal produced by the detector and proportional to the intensity of the radiation focused thereto, is analyzed, and, further, one or more characteristic describing the measured object, based on an intensity of a wavelength, a focus point of which was located on the measured surface and was reflected from that focus point to the detector as a strongest specular geometry wavelength.

A computer-readable non-volatile storage medium having embodied thereon computer code for the determining one or more characteristics of a measured object, the computer code comprising program code for receiving measurement data from a measurement device that comprises:

• at least one optical radiation source for emitting optical radiation to the measured object, and
• at least one detector for receiving radiation, reflected from the measured object, and for generating an electric signal proportional to an intensity of the reflected radiation,
• characterized in that
• the measurement device further comprises
• a emitted optical radiation processing unit, which is adjusted to split the optical radiation emitted by the at least one optical radiation source to separate wavelengths and to direct said separate wavelengths to the measured object in a direction that differs from a normal direction of a surface being measured so, that at least a shortest said wavelength and a longest said wavelength of said emitted optical radiation are focused on different depths, in the normal direction of the surface being measured,
• a reflected optical radiation processing unit, which is adjusted to receive the reflected radiation least in a direction of specular reflection that differs from the normal direction of the surface being measured, and to direct the received optical radiation to said at least one detector,
• the computer code further comprising program code for analyzing the electric signal produced by the detector, for determining one or more characteristics describing a surface property of the measured object, based on an intensity of the wavelength of the emitted radiation, a focus point of which was located on the measured surface, and thus, reflected from that focus point to the detector as a strongest specular geometry wavelength.