A method and apparatus are provided for Raman imaging of carotenoids and related chemical substances in biological tissue, such as macular pigments. The method and apparatus utilize the technique of resonance Raman spectroscopy to produce an image of the levels of carotenoids and similar substances in...http://www.google.se/patents/US20030130579?utm_source=gb-gplus-sharePatent US20030130579 - Method and apparatus for raman imaging of macular pigments
