THORLABS OCTP Series User Manual page 29

OCTP Series Scanner
5. Use the knobs indicated in Figure 29 to align the fiber collimation module such that light is centered on
the alignment target. A good starting point for the procedure is a parallel orientation of the kinematic mirror
mount that comprises the fiber collimator mount. The alignment can be monitored on the IR viewing card.
Using this target it is possible to align a non-focused beam by controlling the shadow of the central cross.
The alignment is good when the four open segments of the alignment target are completely visible on the
IR viewing card and the beam fills the segments identically. If the beam is centered on the alignment disk,
it is also centered on the optical axis of the scan cube's output port.
Turn off the ring light if necessary using the light bulb slider under the camera window. It might be
necessary to occasionally move the IR viewing card when its fluorescence intensity becomes low.
When configuring an OCTP-NR for dual path measurement, e.g., when used together with a
Vega™ or Atria™ series OCT system, the alignment ends here.
Rev J, January 17, 2025
Figure 29 Collimator Adjustment
Chapter 4: Installation
Page 25