Design Details of Multi-Functional Color Analyzer for Reflective, Transmittive and Emittive Surfaces

A multi-functional color analyzer instrument (MFCA) capable to measure reflective, transmittive and emittive surfaces is designed at TUBITAK UME Optics Group Laboratories. MFCA is composed of a novel designed optical light source based on mixture of spectral power distributions (SPDs) of two light emitting diodes (LEDs), a custom-made integrating sphere capable of meeting standard measurement conditions of 0A degrees:d, 8A degrees:d, and 0A degrees:45A degrees, two color detectors with different field-of-views which are designed to measure reflective or transmittive and emittive surfaces separately, self-designed three-channel transimpedance amplifiers having gain selection switches from 1 x 10(6) to 5 x 10(9) and a color evaluation software written on LabView 8.0. The linearity and color measurement performance at each measurement geometry of the designed instrument are characterized by using neutral density filters and a standard telespectroradiometer. Design details of MFCA and characterization results are presented herein.