Dual-pattern optical 3D dimensioning
An optical dimensioning system includes one or more light emitting assemblies configured to project one or more predetermined patterns on an object; an imaging assembly configured to sense light scattered and/or reflected off the object, and to capture an image of the object while the patterns are projected; and a processing assembly configured to analyze the image of the object to determine one or more dimension parameters of the object. The light emitting assembly may include a single piece optical component configured for producing a first pattern and second pattern. The patterns may be distinguishable based on directional filtering, feature detection, feature shift detection, or the like. A method for optical dimensioning includes illuminating an object with at least two detectable patterns; and calculating dimensions of the object by analyzing pattern separate of the elements comprising the projected patterns. One or more pattern generators may produce the patterns.
1. A dimensioning assembly comprising:
a camera module having one or more image sensors and an imaging lens assembly;
a light emitting assembly disposed near the camera module;
a single piece optical component comprising:
a light collimator component orientated to receive light from the light emitting assembly and output collimated light;
a light splitter component orientated to receive the collimated light and split the collimated light into a left light beam and a right light beam;
a left beam bender comprising at least two reflective surfaces for relaying the left light beam to a left pattern generator component;
a right beam bender comprising at least two reflective surfaces for relaying the right light beam to a right pattern generator component;
the left pattern generator component orientated to produce a left pattern using the left light beam; and
the right pattern generator component orientated to produce a right pattern using the right light beam; and
a processor configured to detect positions of elements of the left pattern and detect positions of elements of the right pattern.
2. The dimensioning assembly of claim 1 :
wherein the left pattern generator component comprises:
a first diffractive pattern generator; and
wherein the right pattern generator component
comprises:
a second diffractive pattern generator.
3. The dimensioning assembly of claim 1 , wherein the single piece optical component is made of injection molding plastic or glass.
4. The dimensioning assembly of claim 1 :
wherein the light emitting assembly comprises a mounted laser source module associated with a 45-degree rotated shape feature,
wherein the light collimator component, the light splitter component, and the left pattern generator produce the left pattern, and wherein the light collimator component, the light splitter component, and the right pattern generator produce the right pattern, with the left pattern at a 90-degree shape feature rotation from the right pattern.
5. The dimensioning assembly of claim 1 , wherein the left pattern is associated with a first pattern orientation mask, and the right pattern is associated with a second pattern orientation mask, and wherein the left pattern generator and the right pattern generator are orientated to interlace the left pattern and the right pattern based on a baseline offset.
6. The dimensioning assembly of claim 1 , wherein the left pattern and the right pattern are orientated to match a pattern pitch.
7. The dimensioning assembly of claim 1 , wherein the left pattern and the right pattern are orientated based on an off-pitch offset from a pattern pitch.
8. The dimensioning assembly of claim 1 , wherein the left pattern and the right pattern comprise a shared pattern, and wherein the left pattern generator and the right pattern generator are orientated to interlace the left pattern and the right pattern based on a baseline offset.
9. The dimensioning assembly of claim 1 , wherein the left pattern and the right pattern are associated with a complemented dual-pattern, the left pattern generator component and the right pattern generator component orientated to project the left pattern and the right pattern to form the complemented dual-pattern.
10. The dimensioning assembly of claim 9 , wherein the left pattern and the right pattern are associated with a shared pattern, wherein the left pattern is associated with a first pattern feature, and wherein the right pattern is associated with a second pattern feature.