Measuring and testing machines and instruments in the nature of spectrophotometers, particle size analyzers, zeta potential analyzers, photometers for measuring total luminous flux, liquid crystal display analyzers, reflective film thickness monitors, spectral ellipsometers, array spectrometers, photo detectors, CCD cameras for use in measuring moving picture response time, goniophotometers, spectroradiometers, LED spectrometer, quantum efficiency spectrophotometers, wafer thickness monitors;...