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US 2026/0243931 A1Published application
Retroreflectors providing information encoded in reflected non-visible laser while retaining visible light safety properties
AssigneeLighthouse Technology Group Inc.
InventorsSura HADI, William DAVIS, Michael John Bosworth ROBERTS, Michalyn ANDREWS
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Abstract
Described are retroreflective marker devices, which encode information that can be read by optical sensors, such as LiDAR devices, and that do not detract from human safety. Also described are kits for retrofitting existing markers.
Claims20
A reflective marker device comprising:
- a. a retroreflective surface and a lens covering the retroreflective surface to form a face;
- b. the face comprising a plurality of regions, the plurality of regions comprising at least a region of a first type and a region of a second type;
- c. the region of the first type comprising a first filter embedded in the lens, the first filter attenuating a light of a first laser having a first source and a wavelength outside a visible wavelength spectrum incident on the face;
- and
- d. the region of the second type lacking the first filter and reflecting the light of the first laser incident on the face to the first source;
- wherein both the region of the first type and the region of the second type reflect light within the visible wavelength spectrum incident from the face to the first source;
- and wherein the light of the first laser incident on the face is reflected to the first source as a first pattern, the first pattern comprising encoded information.
4 more elements
Dependencies are inferred from the claim text.