THORLABS OCTP Series User Manual page 25

OCTP Series Scanner
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Figure 24 Connecting the Fiber to the Base Unit (pre-2020 Base Unit Shown Here)
4.3. Optical Alignment
The system comes preassembled. Additionally, the galvo scan mirrors and the camera inside the scan cube
are aligned with regard to the focusing optics. However, for final installation, it is necessary to align the collimator
orientation, the scan cube, and the reference arm to generate an optimal interference signal. These steps are
described in Section 4.3.1. Furthermore, the polarization adjustments for OCTP-PS Systems are detailed in
Section 4.3.2.
The OCTP is often used with near-infrared light, which is invisible to the eye. Hence, for alignment purposes, it
is necessary to use a CCD camera or the included IR viewing card (item # VRC2) to visualize the NIR light.
Alternatively, a visible, fiber based light source may be connected to the scanner for alignment purposes only.
Rev J, January 17, 2025
Figure 23 Connecting the Fiber to the Base Unit
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Chapter 4: Installation
Page 21