Three-dimensional imaging using a single camera

摘要

The attenuation and other optical properties of a medium are exploited to measure a thickness of the medium between a sensor and a target surface. Disclosed herein are various mediums, arrangements of hardware, and processing techniques that can be used to capture these thickness measurements and obtain three-dimensional images of the target surface in a variety of imaging contexts. This includes general techniques for imaging interior/concave surfaces as well as exterior/convex surfaces, as well as specific adaptations of these techniques to imaging ear canals, human dentition, and so forth.

主权项

1. A system comprising:
an inflatable membrane having a surface including a fluorescent substance that fluoresces over a range of wavelengths; a supply of a medium that absorbs a first wavelength of light within the range of wavelengths more than a second wavelength of light within the range of wavelengths, the supply being coupled to the inflatable membrane to permit selective delivery of the medium into the inflatable membrane; a light source positioned within the inflatable membrane and capable of illuminating the surface of the inflatable membrane at an excitation wavelength for the fluorescent substance; a sensor positioned within the inflatable membrane to measure an intensity of the first wavelength and an intensity of the second wavelength in a direction of a location on the surface when illuminated by the light source; a processor programmed to determine a thickness of the medium in the direction based upon a ratio of the intensity of the first wavelength and the intensity of the second wavelength, and the processor further programmed to construct a three-dimensional image of a region of interest of the surface based upon a plurality of thickness measurements; and a window within the inflatable membrane providing an optical view from within the inflatable membrane to an area outside the inflatable membrane.