THORLABS GAN1x1 Series, Руководство пользователя

Страница: 27 / 80

SD-OCT Base Unit Chapter 3: Description
Rev C, June 25, 2021 Page 23
OCT Base Unit Components
The base unit ships together with a preconfigured PC, depending on the base unit type.
Neither a scanner nor the OCT-STAND are included in the base unit package and must be ordered separately.
When ordered together with a scanner, the system will be pre-assembled at Thorlabs and the PC settings will
already be calibrated and optimized for the delivered OCT scanner.
Base Unit
The base unit is the main component of an SD-OCT system. This unit sends light to the probe, communicates
with the PC through a USB connection, synchronizes with the camera of the spectrometer and delivers the
measurement data to the PC. The base unit contains a broadband super luminescent diode (SLD), which is
directed through a fiber optical coupler to the “Fiber” port at the backside of the device. The back-scattered and
reflected light from the probe is returned through the fiber optic coupler or circulator, which directs the light to a
spectrometer (as described in Figure 16 or Figure 17). Other components in the base unit include a high-speed
linear imaging sensor, analog and digital timing circuitry, analog controls for the probe, and data acquisition
hardware.
The central wavelength of the system depends on the SLD. The use of near-IR broadband sources balances
the desire for low scattering losses with the need to operate within the wavelength range that will provide higher
penetration depth into the sample. Near-IR broadband sources are a perfect compromise between sufficient
transparency and a significantly reduced scattering coefficient.
PC with Graphical User Interface
The OCT base unit ships with application software made for the imaging scanners provided by Thorlabs. All
required data analysis as well as 2D and 3D display can be performed within the ThorImage
®
OCT software.
Data can be stored, analyzed, and exported for further use.
Detailed operating instructions for the OCT software are provided in the ThorImage ® OCT software manual.
SDK
A software development kit (SDK) is provided with the system. The SDK gives access to all software routines
used to control the units and to process the acquired data. It allows a quick start for application-specific software
development. The SDK interface is implemented in two programming languages: C and National Instruments
®
Figure 23 Base Unit