Optics InfoBase contains links to several optics publications, many of which have free on line articles. The Optics Report has current news in the optics field.
TheWhitaker Foundation provides information about Biomedical Engineering both in academia and industry.
NIH Office of Extramural Research, Bioimaging at NIH website provides simple descriptions of imaging at the molecular, cellular, tissue and organ levels. It also has links to other bioimaging websites.