9 Photometric apparatus, namely, photometers, retroreflectometers, colorimeters, integrating spheres, and lighting control apparatus; photometric apparatus, namely, instruments for measuring light, light flux, color, luminous intensity and distribution, light spectrum and spatial radiation; photometric apparatus, namely, instruments for testing LED modules and flat panel displays; photometric apparatus, namely, instruments for testing general, solid state, automotive, traffic and aviation lighting; apparatus and systems consisting thereof for the optical characterization of screens and displays, namely, optical sensors, spot colorimeters, imaging colorimeters and imaging photometers; spectrometers; spectroradiometers; colorimeters; photometers; imaging systems, mainly comprising of a camera and a colorimeter; image capturing devices, namely, imaging photometers and colorimeters; cameras, especially imaging photometers and colorimeters; measuring apparatus and systems consisting thereof as well as accessories therefor for display measurement, namely, colorimeters, spectrometers and photometers; computer software for operating, controlling and calibrating photometry equipment; computer software for controlling measuring apparatus, devices and systems of the aforesaid kind