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US 12,498,509 B2Granted
Retro-reflective disc target having exposed retro-reflective beads
AssigneeNorthern Digital Inc.
InventorsLarry Chen, David Willms, Athanasios Tommy Balkos, Shaulaine White
Life of this patent
Estimating the term…
Abstract
A retro-reflective marker comprising a bare retro-reflective layer; a protective layer with a near-infrared (NIR) wavelength specific anti-reflective coating; and a border with an NIR absorbent coating.
Claims27
A retro-reflective marker comprising:
- a retro-reflective layer comprising retro-reflective beads, wherein the retro-reflective beads are exposed to air;
- a near-infrared (NIR) filter with an NIR wavelength specific anti-reflective coating;
- and
- a border having an NIR absorbent coating, the border covering a portion of the NIR filter and defining an aperture for the retro-reflective marker.
1 more element
A retro-reflective marker comprising:
- a retro-reflective layer comprising retro-reflective beads, wherein the retro-reflective beads are exposed to air;
- a visibly opaque protective layer with a near-infrared (NIR) wavelength specific anti-reflective coating;
- and
- a border having an NIR absorbent coating, the border covering a portion of the protective layer and defining an aperture for the retro-reflective marker.
1 more element
A retro-reflective marker comprising:
- a retro-reflective layer comprising retro-reflective beads, wherein the retro-reflective beads are exposed to air;
- a protective layer with a near-infrared (NIR) wavelength specific anti-reflective coating;
- and
- a border having a ring shaped geometry and comprising an NIR absorbent polyimide film, the border covering a portion of the protective layer and defining an aperture for the retro-reflective marker.
1 more element
A marker comprising:
- a cylindrical mounting base;
- a retro-reflective layer adjacent to the cylindrical mounting base and comprising retro-reflective beads, wherein the retro-reflective beads are exposed to air;
- a visibly opaque protective layer configured to provide a near-infrared (NIR) filter above the retro-reflective layer;
- a NIR anti-reflective coating adjacent to a top surface of the visibly opaque protective layer and adjacent to a bottom surface of the visibly opaque protective layer, the NIR anti-reflective coating being operable to provide destructive interference of incident waves,
- an anti-smudge coating adjacent to the NIR anti-reflective coating adjacent to the top surface of the visibly opaque protective layer;
- a border having a ring shaped geometry and comprising an NIR absorbent film, the ring shaped geometry defining an aperture for the marker;
- and
- a retaining ring configured to maintain relative positioning of the retro-reflective layer, the visibly opaque protective layer, the retaining ring mounting to the cylindrical mounting base.
5 more elements
Dependencies are inferred from the claim text.