An optical multichannel analyzer was used to develop a reflectance radiometer for measurement of medical diagnostic samples. Sample areas were small, typically 5 mm x 5 mm. Spectral and temporal resolution of the reflectance measurements were 0.5 nm and 17 ms, respectively. Reflectance drifts were found to be less than 0.004 over 2 h with accuracy better than 0.012 compared with a reference method. Flexible instrument design allows use of many different illumination and detection geometries. Applications include performance evaluations of chemical formulations and readhead designs.
"Reflectance Measurements From Small Areas With An Optical Multichannel Analyzer," Optical Engineering 28(3), 283255 (1 March 1989). https://doi.org/10.1117/12.7976942