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camera mounted at an angle to the laser plane acquires images of the light pattern
created on the target. These images contain the basic information needed to compute
distances to the target.
4.3 True Differential Measurement
The scan 3x00 sensors can be aligned co-planar top-to-bottom and side-to-side
down the length of the system. This prevents profile measurement errors that could be
introduced by hard-to-control mechanical realities such as chain vibration and boards
bouncing as they are transported through the scanner system.
4.4 Vision
scan 3350 sensors incorporate colour imagers and LED lighting into their
design. This provides a simple and reliable method of capturing features on the top and
bottom surfaces of the boards along the length of the system.
4.5 Tracheid
scan 3250 sensors have the ability to measure the tracheid cells, reporting the
angle of the grain, the scatter along that axis, and the effect of the tracheid on the size of
the laser spots.
4.6 High Scan Rates
The scan 3x00 sensor family provides profile scan rates of 2000 Hz (2500 Hz
for the scan 3250). At the same time, the sensors maintain excellent dark wood
performance (equivalent to level 19 on the Kodak gray scale chart), insensitivity to laser
saturation, and immunity to ambient light.
4.7 Temperature Compensated Ranges
scan 3x00 sensors are calibrated at several temperature points in their
operational range to ensure reliable and accurate range measurement throughout
changes in ambient temperature.
Summary of Contents for chroma+scan 3155
Page 1: ...chroma scan 3x00 Document Version 4 11 12 30...
Page 14: ...14 3 1 1 Sensors chroma scan 3155 chroma scan 3250 chroma scan 3350...
Page 31: ...31 5 5 Dimensions and Mounting 5 5 1 chroma scan 3155 Sensor Dimensions...
Page 32: ...32 5 5 2 chroma scan 3250 Sensor Dimensions...
Page 33: ...33 5 5 3 chroma scan 3350 Sensor Dimensions...
