Align Technology, Inc.

Shlomi Buganim

Eliahou Franklin Nizard

Arkady Rudnitsky

An apparatus for intraoral scanning comprises an elongate wand comprising a probe at a distal end of the elongate wand, one or more structured light projectors coupled to the elongate wand at a distal end of the elongate wand, the one or more structured light projectors configured to project a light pattern comprising a plurality of structured light features, one or more cameras coupled to the elongate wand at the distal end of the elongate wand, a window through which light exits and enters the probe, wherein the window reflects structured light features of the projected light pattern responsive to exposure of the window to the projected light pattern, and a processor. The processor is configured to run a three-dimensional image reconstruction algorithm based on the projected light pattern and a reflected light pattern returning from an object exposed to the projected light pattern to generate a three-dimensional surface of the object, wherein the reflected structured light features that have been reflected off of the window are excluded from the three-dimensional image reconstruction algorithm.

Reflection suppression for intraoral scanner

An apparatus for intraoral scanning includes an elongate handheld wand comprising a probe at a distal end of the handheld wand, one or more light projectors coupled to the handheld wand, and one or more cameras coupled to the handheld wand. Each camera comprises a camera sensor and objective optics comprising one or more lenses. Each camera is configured to focus at an object focal plane that is located between 1 mm and 30 mm from the lens that is farthest from the camera sensor. The apparatus further includes a fluorescent transparent film deposited on a surface selected from the group consisting of: a window of the probe through which light exits and enters the probe, and a transparent surface that is not integral to the probe.

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Beer Sheva, Israel

Shlomi Buganim