Disclosed is a living body measurement apparatus including: a first light source placed on the surface of the skin in a living body and radiating a first light in a visible light wavelength range onto the surface of the skin; a second light source placed on the surface of the skin and radiating a second...http://www.google.de/patents/US8116851?utm_source=gb-gplus-sharePatent US8116851 - Living body measurement apparatus with waveguide light source and light extracting pattern
