Original Instructions Lumedica OQ LabScope 1.2 | Page 16 of 26
Save Raw B-Scan Image — Available when the system is not acquiring OCT images, i.e. the
Start/Stop button says “Start Scan”. When this button is pressed the system will save a copy of
the raw B-scan data from the spectrometer to a file. The image format is .tif and is in the
directory C:\Users\Public\Documents\Lumedica\OctEngine\Data. The files are named “BSCAN-
RAW-#date#-#time#” where #date# is the date and #time# is the time when the file was
saved. The current background subtraction data is also saved with the name “BSCAN-BKGD-
#date#-#time#”.
Save All Raw Images — Available when the system is not acquiring OCT images, i.e. the
Start/Stop button says “Start Scan”. When this button is pressed the system will save a copy of
all the raw B-Scan data in the queue from the spectrometer to a set of files. The image format
is .tif and they are saved to a new folder in
C:\Users\Public\Documents\Lumedica\OctEngine\Data\#date#-#time# where #date# is the
current date and #time# is the time when the files were saved. The files are named “BSCAN-
RAW-#number#” where #number# is the number of the image in the buffer, zero-padded to
three digits (e.g. 001). The current background subtraction data is also saved in this folder
with the name “BSCAN-BKGD”.
Sliders:
Focal Value — Located to the left of the OCT image, this slider controls the liquid lens in the
scanner. Moving the slider up and down sets the focus position of the OCT scanning beam.
When the slider is at the top of the screen, the focus is closest to the scanner and when the
slider is at the bottom of the screen the focus is farthest away from the scanner.
Dynamic Range Bottom — This slider on the right side of the image sets the bottom value of
the intensity range of the left-hand image. Sliding this all the way to the bottom will typically
make the image look whiter and noisier. Sliding this toward the top will typically make the
image look blacker and less noisy, but will start to suppress the image signal. As the slider
approaches the top of the range, only the most intense areas of the image will still be visible.
Dispersion Compensation B — Sets the second order coefficient in the dispersion
compensation. This may be adjusted while the system is running to optimize the value.
Dispersion Compensation C — Sets the third order coefficient in the dispersion
compensation. This may be adjusted while the system is running. Typically, the value of this
coefficient is close to zero.
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