Back to results
US 2019/0154437 A1Published application
Structured light sensing for 3d sensing
AssigneeFacebook Technologies, LLC
InventorsGuy Raz, Nadav Grossinger, Nitay Romano
Life of this patent
Estimating the term…
Abstract
Apparatus for structured light scanning. The structured light includes one or more projected lines or other patterns. At least two independent emitters emit light for each projected line or pattern. Typically the at least two independent emitters are arranged in a row. The apparatus also includes a pattern generator for causing light from respective emitters of a given row to overlap along a pattern axis to form a projected pattern.
Claims20
An apparatus comprising:
- an array of emitters arranged in a plurality of rows, the plurality of rows including a first row that includes at least two independent emitters that are mutually incoherent and a second row that includes at least two independent emitters that are mutually incoherent;
- and
- a pattern generator for causing light from the at least two independent emitters of the first row to overlap to form a first part of a projected pattern and light from the at least two independent emitters of the second row to overlap to form a second part of the projected pattern,
- wherein the first part of the projected pattern and the second part of the projected pattern do not overlap, wherein the mutual incoherence of the at least two independent emitters in the first row reduce speckle noise in the first part of the projected pattern, and wherein the mutual incoherence of the at least two independent emitters in the second row reduce speckle noise in the second part of the projected pattern.
1 more element
A method comprising:
- emitting light from independent coherent light emitters arranged in a plurality of rows, the plurality of rows including a first row that includes at least two independent emitters that are mutually incoherent and a second row that includes at least two independent emitters that are mutually incoherent;
- and
- causing light from the at least two independent emitters of the first row to overlap to form a first line of a plurality of projected lines and causing light from the at least two independent emitters of the second row to overlap to form a second line of the plurality of projected lines,
- wherein the first line and the second line do not overlap, wherein the mutual incoherence of the at least two independent emitters in the first row reduce speckle noise in the first line, and wherein the mutual incoherence of the at least two independent emitters in the second row reduce speckle noise in the second line.
1 more element
An apparatus comprising:
- an array of emitters arranged in a plurality of rows, the plurality of rows including a first row that includes at least two independent emitters that are mutually incoherent and a second row that includes at least two independent emitters that are mutually incoherent;
- and
- a pattern generator for causing light from the at least two independent emitters of the first row to overlap to form a first line of a plurality of projected lines and light from the at least two independent emitters of the second row to overlap to form a second line of the plurality of lines,
- wherein the first line and the second line do not overlap, wherein the mutual incoherence of the at least two independent emitters in the first row reduce speckle noise in the first line, and wherein the mutual incoherence of the at least two independent emitters in the second row reduce speckle noise in the second line.
1 more element
Dependencies are inferred from the claim text.