Optoelectronic spectral analysis system

Page identification by detection of optical characteristics

Photoelectric densitometer

Portable colorimeter

Process for discriminating the color of a surface and apparatus

Quantitative evaluation of a color filter

Reference corrected color sensor

Sensing blend color homogeneity

Simultaneous plural colors analysis spectrophotometer

Spectrophotometer arrangement with multi-detector readhead

System and method for lead edge and trail edge sheet...

Systems and methods for compensating for temperature induced...

Testing method by a spectroscopic photometry using three wavelen

Transmissivity measuring apparatus for a color separation prism