THORLABS OCT-LK Series, Руководство пользователя

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OCTP Series Scanner Chapter 4: Installation
Rev F, November 03, 2018 Page 17
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.
ATTENTION
The galvanometer scanners and the camera are factory aligned to the optical axis of the
focusing optics. Any modification to the scanners or the camera may cause loss of alignment.
The optical alignment cannot be retrieved with the standard procedure described in this manual
if the scanners and/or the camera are misaligned! When optical alignment failure persists please
contact OCT support (see Chapter 11) for assistance.
Always turn off the base unit before changing or adjusting OCTP configuration or accessories
such as the objective, scan lens kit, reference arm adapter, or sample z-spacer. For Thorlabs
OCT base units, turn off the OCT base unit main power to turn off the light source.
4.3.1. Alignment to Optical Axis
We recommend aligning the OCTP using the OCT light source and the camera-based control equipment to be
used with the scanner (e.g., a Thorlabs OCT base unit and ThorImage ® OCT software).
Alignment consists of the following steps:
1. If the OCTP is already installed, remove the objective. First, unmount the illumination part of the scan lens
kit by unscrewing the four screws that hold the steel plate in the brass adapter plate. This will remove the
ring light conductor from around the objective, and it will also expose a printed circuit board (PCB) and
the LEDs of the ring light, which should not be touched. Then unscrew the objective.
Figure 20 Removing the Objective