Apparatus for caries detection
US7702139B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 13, 2006 |
| Grant date | Apr 20, 2010 |
| Priority date | — |
| Expiry date | Nov 24, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J2003/468
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for imaging a tooth having a light source with a first spectral range and a second spectral range. A polarizing beamsplitter (18) 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 first and second polarization states are orthogonal. A first lens (22) in the return path directs image-bearing light from the tooth, through the polarizing beamsplitter (18), toward the sensor (68), and obtains image data from the redirected 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. Control logic enables the sensor to obtain either the reflectance image or the fluorescence image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.