Optical microscope uses visible light and lenses to magnify small images and is also known as light microscope. It is widely used to view dead or living samples by the scientific community. Only one magnifying glass was used by simple optical microscope whereas more than two lenses are used by modern optical microscope nowadays. The expansion of beam of laser light to make the greatest use of optics is the principal technique used in optical microscope. Thus, it finds its applications in life sciences, nanotechnology, semiconductors, material sciences, and others in end uses such as hospitals & clinics, academics & research institutes, pharmaceuticals & biotechnology companies, diagnostic laboratories, and others.