An apparatus for measuring multiple wavelengths of fluorescence emitted from fluorescent dye-treated cells, tissue preparations, or solutions which is comprised of a custom designed optical module into which is integrally fitted a source of long wavelength red light, a specimen stage, an epifluorescence...http://www.google.ca/patents/US4900934?utm_source=gb-gplus-sharePatent US4900934 - Apparatus for simultaneous visualization and measurement of fluorescence from fluorescent dye-treated cell preparations and solutions
