APPARATUS FOR CARIES DETECTION

摘要

An apparatus for obtaining an image of a tooth having at least one light source providing incident light having a first spectral range for obtaining a reflectance image ( 122 ) from the tooth and a second spectral range for exciting a fluorescence image ( 120 ) from the tooth. A polarizing beamsplitter ( 18 ) in the path of the incident light from both sources directs light having a first polarization state toward the tooth and directs light from the tooth having a second polarization state along a return path toward a sensor ( 68 ), wherein the second polarization state is orthogonal to the first polarization state. A first lens ( 22 ) in the return path directs image-bearing light from the tooth toward the sensor ( 68 ), and obtains image data from the portion of the light having the second polarization state. A long-pass filter ( 15 ) in the return path attenuates light in the second spectral range.