KCS

Light and optical systems are now commonly used in biology and medicine. Optical methods have many advantages since they involve i) non-ionizing radiation; ii) easy energy delivery; iii) molecule-specific diagnosis, etc. Optical methods can be applied to single molecules, cells, tissues, and organs. In this paper, several optical microscopic methods are introduced including optical coherence tomography (OCT), confocal microscopy, and nonlinear optical microscopy. Current activities and research trends are also reviewed.