White Paper - SX12 Tracking and Target Separation 3
https://geospatial.trimble.com
3
The light reflected from the target is focused by the SX12 front lens to a dedicated tracker camera sensor (called
the tracker detector). The light from the target will create an image on the tracker detector.
Figure 2. A schematic view of the SX12 tracker locking onto a target.
The tracker, EDM and telecamera are all coaxial, as shown in the telescope cross-section image below. An
advantage of there being no eyepiece on the SX12 instrument is the ability to have the tracker detector at the
back center of the telescope; this gives the most stable optical path for the tracker, and therefore the best
performance.
Figure 3. A cross section of the telescope optics of the SX12.
Target
Light from Tracker transmitter
Light reflected by target
Tracker detector
Instrument front lens
Image of target
EDM Transmitter
& Receiver
Tracker
Transmitter
Tracker
Detector
Telecamera
