Which Zebra 3S is good for you?

Zebra 3S sensor models are differentiated by their scanning technology and scanning volumes. You should select a model depending on your application.

Movement in the scene (static or dynamic)

Zebra 3S sensors are depth sensing devices working on the principle of optical triangulation. Modulated light projected from the projection unit is reflected by the scanned object and captured by the main camera unit, from which the distance to the object is computed. Depending on which model you use, you can capture either static or dynamic scenes.

To capture scenes that are completely static during the scan, you can use Zebra 3S40 or 3S80 in sequential structured light mode (scanner mode). To capture dynamic scenes, you need to use Zebra 3S80 in Parallel Structured Light™ mode (camera mode), which allows the scene to be in arbitrary movement or vibration and is good for applications that require high accuracy and very short cycle times.

Required scanning volumes, acquisition time, color, and resolution requirements

Zebra’s 3S40 sensor use case:

Static scenes with larger objects and bigger volumes.

High resolution requirements.

Only supports greyscale texture images.

Zebra’s 3S80 sensor use case:

Dynamic scenes with medium-sized objects and volumes (3S80-4M
), or larger objects and bigger volumes (3S80-4L
). The Zebra 3S80-4L can extend its scanning range up to 3 m, but its optimal scanning distance is 1.25 m, where the sensor captures high-resolution point clouds of objects within an area measuring 1027 x 836 mm.

Highest resolution requirement with fastest scanning time.

Supports color texture images.

Object recommendations and pitfalls

As both Zebra 3S40 and 3S80 sensors rely on the reflection of projected light, objects most suitable for scanning are (including and not limited to):

Rough surface objects, such as wood, rubber, paper, and plaster.

Objects with a matte finish, such as sand-blasted aluminum and cast iron.

Molded, un-polished plastic materials.

Some objects not suitable for scanning (including and not limited to):

Mirrors and polished metals.

Most liquids, such as water or oil.

Translucent and transparent objects, such as glass and transparent plastic.

Smoke and particles dispensed in the air can negatively influence the 3D data.