SCIENTIFIC APPARATUS AND INSTRUMENTS FOR OPTICAL ANALYSIS, NAMELY, SPECTROMETERS, PHOTOLUMINESCENCE AND FLUORESCENCE SPECTROMETERS. APPARATUS AND INSTRUMENTS FOR PHOTOLUMINESCENCE LIFETIME MEASUREMENT AND SPECTROGRAPHS; MICROSCOPES; SCANNERS; AND RELATED COMPONENTS THEREOF, NAMELY, LIGHT-CONDUCTING FILAMENTS, ELECTRIC POWER CABLES, INTERFACE BETWEEN ELECTRICAL POWER CONNECTORS, DIFFRACTION GRATING, OPTICAL LENSES, OPTICAL MIRRORS AND OPTICAL FILTERS; COMPUTER SOFTWARE FOR OPTICAL ANALYSIS AND...