THORLABS OCTP Series User Manual

User-customizable scanner and scan lens kits

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OCTP Series and OCT-LKx

User-Customizable Scanner

and Scan Lens Kits

User Manual

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Summary of Contents for THORLABS OCTP Series

Page 1 OCTP Series and OCT-LKx User-Customizable Scanner and Scan Lens Kits User Manual...
Page 2 Original User Manual – not translated...
Page 3 3.2.1. Threaded Holes on Imperial OCTP Scan Cube Module ..........13 3.2.2. Threaded Holes on Metric OCTP Scan Cube Module ..........14 3.2.3. Mounting to Thorlabs OCT-STAND ................14 3.3. Compatibility between Scanner and Base Units ..........15 Installation ........................16 Chapter 4 4.1.
Page 4 OCTP Series Scanner 9.1. User-Customizable Scanner and Scan Lens Kit ..........38 9.2. Non-Warranty Repairs ................... 38 9.3. Warranty Exclusions ..................... 38 Thorlabs Worldwide Contacts .................. 39 Chapter 10...
Page 5 OCTP Series Scanner Chapter 1: Warning Symbol Definitions Warning Symbol Definitions Chapter 1 Below is a list of warning symbols you may encounter in this manual or on your device. Symbol Description Direct Current Alternating Current Both Direct and Alternating Current...
Page 6 Always turn off the light source before changing or adjusting the OCTP configuration or accessories as the objective, scan lens kit, or sample z-spacer. For Thorlabs OCT base units, turn off the OCT base unit main power to turn off the light source.
Page 7 In order to achieve the intended performance, this scanner should only be used with qualified parts. Please have a conversation with Thorlabs’ support to determine if other parts you wish to use are compatible. Any modification or servicing of this system by unqualified personnel renders the warranty null and void, leaving Thorlabs free of any liability.
Page 8 3.1. Components The OCTP is intended as an accessory for use with Thorlabs OCT base units. It is assembled from standard Thorlabs opto-mechanics that provide mechanical compatibility with our 30 mm cage systems, SM1 lens tubes, and Ø1” optics, providing a high degree of experimental flexibility.
Page 9 The 30 mm cage cube has four ports, one of which is blocked by an end cap before being shipped. In principle, it is possible to use this last port for asymmetric light coupling, a second detector, or a second input wavelength. Please contact Thorlabs’ support for details. Rev J, January 17, 2025...
Page 10 OCTP Series Scanner Chapter 3: Components and Compatibility 3.1.3. Reference Arm Module (not for OCTP-NR) Figure 4 Reference Arm Module The reference arm module contains a mounted mirror (i.e., retroreflector) that reflects the beam from the light source back into the OCT interferometer.
Page 11 The electrical control interface hosts the included Thorlabs electric control cable to connect the imaging scanner with a Thorlabs OCT base unit. Please contact Thorlabs support for information regarding the pin configuration.
Page 12 OCTP Series Scanner Chapter 3: Components and Compatibility 3.1.5. Objective Holders There are two different brass plates included that are used to hold the objective to the OCTP: • The pre-installed objective holder for the use of our OCT-LKx scan lens kits.
Page 13 OCTP Series Scanner Chapter 3: Components and Compatibility 3.1.6. OCT Scan Lens Kit (Accessory) For the case that an OCT scan lens kit is installed, the mechanical dimensions are summarized in the table below. Figure 8 Objective Holder Shown with Scan Lens Kit Installed...
Page 14 Chapter 3: Components and Compatibility Installation of the OCT Scan Lens Kit The OCT scan lens kits from Thorlabs are accessories specially designed to support telecentric scanning over a wide range and to compensate the dispersion mismatch of the scanner.
Page 15 OCTP Series Scanner Chapter 3: Components and Compatibility • Insert the adapter plate by using the four included M2.5 x 6 cap screws • Screw the objective set into the housing without any side loads on the threading • Secure the objective with the installed set screw in the objective set Dispersion Compensation Installation Procedure •...
Page 16 OCT-STAND using a spring-loaded mount accepting the dovetail mount of the OCTP. The focus block can be rotated 360° around the Ø1.5” rod, and features 30 mm of travel with fine and coarse adjustment knobs. Figure 12 OCTP in Thorlabs OCT-STAND Page 12...
Page 17 OCTP Series Scanner Chapter 3: Components and Compatibility 3.2. Custom Mounting The mechanical drawings shown below depict several threaded holes that can be used to secure the scanner to an optical breadboard or an application-specific mount. The tap depth is twice the diameter.
Page 18 The OCTP ships with a mounting adapter and a dovetail mount, as shown in Figure 15. These accessories allow the scanner to be mounted to a Thorlabs OCT-STAND which ensures that the objective is directly centered above the sample plate.
Page 19 For common statements, the abbreviation “OCTP” is used for all setups. The OCTP scanners are fully compatible with all Thorlabs OCT base units of the Ganymede™ and Telesto™ series. The OCTP-NR scanner is intended to be used with the Vega™ and Atria™ series base units.
Page 20 We recommend mounting the OCTP(-PS) in a Thorlabs OCT-STAND. The OCTP-PS is composed of a linear stage instead of the lens tube system used in the OCTP. Hence, adjustments of the reference length are possible. In addition, it consists of two quarter-wave plates in the sample arm and the reference arm to adjust the polarization state.
Page 21 OCTP Series Scanner Chapter 4: Installation 4.1. OCTP Mounting To mount the OCTP in the OCT-STAND, gently slide the dovetail of the OCTP into the dovetail slide of the OCT-STAND. Figure 18 Mounting the OCTP in the OCT-STAND Rev J, January 17, 2025...
Page 22 OCTP Series Scanner Chapter 4: Installation 4.2. OCTP Connections 4.2.1. Connecting the Electrical Control Interface Attach the electric control cable from the OCT base unit to the OCTP. You may use either side of the cable since the plugs are identical. The OCTP’s electrical control interface is located at the top of the scan cube, as shown in Figure 19.
Page 23 OCTP Series Scanner Chapter 4: Installation Figure 21 Installation of the Electrical Control Cable at the Base Unit (pre-2020 Unit Shown Here) Rev J, January 17, 2025 Page 19...
Page 24 ATTENTION When installing the fiber, make sure that the fiber tip does not get contaminated by dust. Thorlabs’ Fiber Inspection Scope (Item # FS201) and Fiber Connector Cleaner (Item # FBC250) are useful for keeping the optical path clean. Do not touch the fiber tip! Attach the optical fiber from the OCT base unit to the OCTP, as illustrated in Figure 22.
Page 25 OCTP Series Scanner Chapter 4: Installation Figure 23 Connecting the Fiber to the Base Unit 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.
Page 26 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.
Page 27 OCTP Series Scanner Chapter 4: Installation Set screw 4 screws Figure 26 Removing the Objective 2. The ports should look like one of the two images below (Figure 27). Figure 27 Optics Output Port for OCT-LKx (Left) and SM1 (Right) 3.
Page 28 OCTP Series Scanner Chapter 4: Installation Figure 28 Alignment Target 4. Turn on the Thorlabs OCT base unit to power up the galvanometer scanners in the OCTP and start the ® ThorImage OCT software. To make sure that the mirrors are in their assigned initial position and the light source is turned on, choose the 2D Scan mode and simply “Start”...
Page 29 OCTP Series Scanner Chapter 4: Installation 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.
Page 30 OCTP Series Scanner Chapter 4: Installation 6. Align the optical beamsplitter module with respect to the reference arm module. The goal of this step is to maximize the intensity of the light in the reference arm that returns to the collimator and is collected by the fiber.
Page 31 OCTP Series Scanner Chapter 4: Installation 9. Place a suitable sample for adjusting the focus under the objective, like the IR viewing card delivered with ® the system. Then use ThorImage OCT to visualize the card. Adjust the height of the OCTP with respect to the card by adjusting the focus block of the OCT-STAND until you get a sharp image of the sample, turning on the ring light if necessary.
Page 32 OCTP Series Scanner Chapter 4: Installation When not configured for a polarization-sensitive SD-OCT system, the alignment ends here. Please continue below for adjusting the OCTP-PS. 4.3.2. Polarization Adjustment In polarization-sensitive OCT, the polarization state of the incident light is adjusted in both the reference arm and the sample arm.
Page 33 OCTP Series Scanner Chapter 4: Installation 2. To detect the polarization state of the sample arm the reference arm has to be blocked, e.g. by closing the zero-aperture iris. 3. Place a mirror in the focus of the sample arm. Rotate the quarter-wave plate such that the intensity on Camera 0 is maximum and the intensity on Camera 1 is minimum.
Page 34 OCTP Series Scanner Chapter 5: Description Description Chapter 5 5.1. Theory 5.1.1. Signal Generation Optical coherence tomography (OCT) generates cross-sectional images up to several millimeters deep into tissue. The images are assembled by a series of adjacent depth profiles, allowing 2D and 3D reconstruction of the specimen.
Page 35 While this approach is able to provide greater sensitivity due to the absence of the beamsplitter cube (which reduces the intensity of the light that returns to the fiber), it is significantly more sensitive to the optical phenomena mentioned before. Please contact Thorlabs’ support for details. Figure 37 Diagram of the Dual Path Setup...
Page 36 The OCTP scanner is designed for simple and rapid installation. Its mechanical features enable compatibility with Thorlabs’ SM1 lens tube and 30 mm cage system standards, permitting simple and easy system modifications that improve and optimize the performance. The OCTP scanner also allows integration of additional components for adaptation to a specific application.
Page 37 OCTP Series Scanner Chapter 7: Certifications and Compliance Certifications and Compliance Chapter 7 Rev J, January 17, 2025 Page 35...
Page 38 Table 7 Optical Specifications Scan Lens Kits working in OCTG at 1300 nm / 1325 nm The OCT-LK5-BB and OCT-LK5 lens kits are appropriate for use with the OCTG11NR and OCTG-1300NR systems, respectively. For compatibility with other scanners please contact oct@thorlabs.com. Page 36...
Page 39 OCTP Series Scanner Chapter 8: Specifications 8.1. Reflectivity Scanning Mirror The OCTP series user-customizable scanners are equipped with a semitransparent galvo mirror to enable video camera imaging.* OCTP Mirror 45° S-Pol. Unpolarized P-Pol. 1000 1100 1200 1300 1400 1500 Wavelength (nm) Figure 40 Reflectivity of Scanning Mirror 8.2.
Page 40 Warranty Chapter 9 9.1. User-Customizable Scanner and Scan Lens Kit Thorlabs offers a one-year warranty on these items. 9.2. Non-Warranty Repairs Products returned for repair that are not covered under warranty will incur a standard repair charge in addition to all shipping expenses. This repair charge will be quoted to the customer before the work is performed.
Page 41 OCTP Series Scanner Chapter 10: Thorlabs Worldwide Contacts Chapter 10 Thorlabs Worldwide Contacts For technical support or sales inquiries, please visit us at www.thorlabs.com/contact for our most up-to-date contact information. USA, Canada, and South America UK and Ireland Thorlabs, Inc.
Page 42 M0009-510-787-G...

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