RayTek MP150 - Operation and Data Transfer; Scan Rate and Target Viewing Time

Operation
32 Rev. E3 07/2013 MP150
6 Operation
6.1 Scan Rate and Target Viewing Time
Figure 12: Linescanner applied to a moving target
Scan
Target direction
Speed = 2 m/s
Distance between the actual measured lines (d), as
output, is a function of the optical scan rate, line
averaging and target speed.
Optical scan rate = 150 Hz
Each revolution = 6,6 ms
Target viewed for 1,6 ms
Internal calculations occur for 5 ms
Example
Snapshot Mode
Target speed = 2 meters/sec (78.7 in.)
Distance between measured lines is given by the
following formula:
i.e., During 100% mirror rotation, which takes 6,6 ms, target moves d = 0.013 m (0.51 in.)
During 25% mirror rotation (target viewing time), which takes 1,6 ms, target moves d
1
= 0.003 m (0.12 in.)
During 75% mirror rotation (internal calibration time), which takes 5 ms, target moves d
2
= 0.01 m (0.4 in.)