Patent ID: 8989848
Filing Date: 2015-03-24
Classification: A61B,G01N

Abstract:
1. An apparatus for determining characteristics of biological tissue or other medium of a subject, comprising: a) means for illuminating the medium with electromagnetic radiation directed into the medium, the means for illuminating comprising a blue LED light source, thereby causing the medium to react with a first action selected from the group consisting of reflecting, backscattering, transmitting, and emitting responsive radiation and a second action selected from the same group excluding the first action; b) a detector for collecting the responsive radiation; c) an optical filter connected to the detector, for separating the collected radiation into a plurality of components, wherein the plurality of components comprises a fluorescent component; d) a processor operable to (i) measure the intensity of each of the separated plurality of components and (ii) determine a mathematical relationship between the separated plurality of components; e) a LED fixation tube for guiding the subject to self-align itself along an axis; f) a lens, optically responsive to the light from the light source, for focusing the light; and g) a lens system, optically responsive to the focused light, having a focus, and defining an aperture at its focus of less than approximately 1 cm, wherein the wavelength of the fluorescent component of the radiation is selected from the group consisting of between approximately 465-500 nm and 520-600 nm.