A microscope slide illumination system is adapted for the side lighting of particles suspended in liquid, where the liquid is retained in a depression in a microscope slide. The system includes a laser source of light, an optic fiber bundle to conduct the laser light, and a single fiber, preferably having...http://www.google.se/patents/US4674846?utm_source=gb-gplus-sharePatent US4674846 - Microscope slide system
