PS

SCIENTIFIC AND EDUCATION LABORATORY SYSTEMS FOR TEACHING OPTICS, ELECTROSTATICS, WAVE THEORY AND OTHER AREAS OF PHYSICS COMPRISING PHOTOMETERS AND PHOTOMETER PROBES, LIGHT SOURCES-NAMELY, INCANDESCENT LAMPS AND LASERS, ANGULAR TRANSLATORS, LINEAR TRANSLATORS, OPTICAL BENCH AND OPTICAL COMPONENTS, NAMELY, POLARIZERS, RETARDERS, LENSES, MIRRORS, SLITS, APERTURES, HOLOGRAMS, FILTERS, AND SCREENS AND MOUNTS FOR SAID OPTICAL COMPONENTS AND RELATED APPARATUS