An apparatus for obtaining images of a tooth comprises at least one image sensor disposed along an optical axis to take polarized reflectance image and fluorescence image, at least one broadband illumination apparatus for reflectance imaging, and a narrow-band ultraviolet illumination apparatus for fluorescence...http://www.google.se/patents/US7929151?utm_source=gb-gplus-sharePatent US7929151 - Intra-oral camera for diagnostic and cosmetic imaging
