DISTIMULUS CHROMATIC MEASUREMENT SYSTEMS

Abstract:- A number of different chromatic measurement systems have been developed based upon logarithmic, linear and digital signal processing. A comparison between the logarithmic and the linear system shows that the linear system is far more versatile and sensitive, capable of operation at considerably lower optical power, has a higher resolution, although it is more expensive. The performance of the digital system is comparable to the linear system but at a cost similar to that of the logarithmic system. In general, the chromatic approach provides a powerful and flexible measurement method with attractive advantages over intensity and two wavelength modulation techniques. Key-Words:- chromatic modulation, chromatic measurement systems