Patent ID: 9658168
Date: 2017-05-23
CPC Classifications: B01L,G01N,Y10S

Claim:
1. A device for determining optical properties by measuring intensities on a thin layer, comprising: at least one light source constructed as a large-area light source and coupled with at least one wavelength filter for selecting a narrow-band wavelength range or a light source capable of emitting light in a narrow wavelength range, at least one first detector or sensor for a time-resolved measurement of the light incident from the at least one light source as reflected on a reference reflector, at least one second detector measuring the field of superposition in the said narrow wavelength range in reflection or in transmission, an evaluation unit that produces a relative signal by comparing input values received from the second detector and the first detector or sensor by forming the quotient of the said values, and by determining a measurement value based on the relative signal matched based on at least one stored lookup table.