Chapter 1 Reference Manual
Ranger E/D
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Introduction
1 Introduction
The Ranger is a high-speed 3D camera intended to be the vision component in a machine
vision system. The Ranger makes measurements on the objects that passes in front of the
camera, and sends the measurement results to a PC for further processing. The meas-
urements can be started and stopped from the PC, and triggered by encoders and photo-
electric switches in the vision system.
Figure 1.1 – The Ranger as the vision component in a machine vision system.
The main function of the Ranger is to measure 3D shape of objects. Depending on model
and configuration, the Ranger can measure up to 35 000 profiles per second.
In addition to measure 3D – or range – the Ranger can also measure color, intensity and
scatter:
Range measures the 3D shape of the object by the use of laser triangulation. This can
be used for example for generating 3D images of the object, for size rejection
or volume measurement, or for finding shape defects.
Intensity measures the amount of light that is reflected by the object. This can for
example be used for identifying text on objects or detecting defects on the ob-
jects’ surface.
Color measures the red, green, and blue wavelength content of the light that is
reflected by the object. This can be used to verify the color of objects or to get
increased contrast for more robust defect detection.
Scatter measures how the incoming light is distributed beneath the object’s surface.
This is for example useful for finding the fiber direction in wood or detecting
delamination defects.
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