Leica T-Scan 5 - T-Scan Controller Back View and Operating Principle; T-Scan Sensor Positioning

Back view
007452_003
a
b
d
c
f
g
e
h
i
a Connector for trigger/probe
cable
b LAN connection to Laser
Tracker controller
c Connector for scanner
cable
d Fuse
e Power socket for:
MPS21 or MPB25
f Connector for trigger cable
g LAN connection to applica-
tion computer
h MPS21, power supply unit
i MPB25, external Li-Ion
battery: 37 V and 8.1 Ah
2.5 General Operating Principle
The T‑Scan sensor is a triangulation scanner using an optically amplified laser
line observed by a 2D imaging sensor.
The T‑Scan sensor has a working range (measurement depth) of approxi-
mately ±50 mm. The mid working distance is the distance from the housing
to the centre of the working range. This distance is also called Stand-off and
amounts approximately 150 mm. The usable scan width at stand-off is
approximately 100 mm.
007453_001
abc
d
e
a Minimum working distance
b Mid working distance
(stand-off)
c Maximum working distance
d Scan width at stand-off
e Working range
In order to facilitate the positioning of the T‑Scan sensor, the sensor emits a
pilot beam. The pilot beam intersects the laser beam at the centre of the
working range. If the pilot beam is underneath the scan line, the distance
between sensor and measuring object is too small. If the pilot beam is above
the scan line, the distance is too large.
Measurement
depth and scan
width
Positioning of the
T‑Scan sensor
20 Description of the System