| 摘要 |
PROBLEM TO BE SOLVED: To provide an intraoral imaging apparatus having an illumination field generator that forms an illumination beam having a contour fringe projection pattern when receiving light from a first light source and having a substantially uniform illumination field when receiving light from a second light source.SOLUTION: A polarizer 14 in the path of the illumination beam has a first polarization transmission axis. A projection lens 16 directs the polarized illumination beam toward a tooth surface, and an imaging lens 22 directs at least a portion of the light from the tooth surface along a detection path. A polarization-selective element disposed along the detection path has a second polarization transmission axis. At least one detector 30 obtains image data from the light provided through the polarization-selective element. A control logic processor 34 responds to programmed instructions for alternately energizing the first and second light sources in a sequence and obtaining both contour fringe projection data and color image data.SELECTED DRAWING: Figure 5 |
