SS-OCT System Base Unit
Chapter 3: Description
Page 18
MTN013142-D02
3.1.3.
Nomenclature in OCT imaging
Figure 17
A-Scan Data Set
As described before, the FD-OCT engine creates a depth profile from the interference of photons sent into the
sample and received back with photons reflected in the reference arm. This depth profile is referred to as an A-
scan. Figure 17 shows a tomato’s A-scan data. The ordinate of this graph represents the modulation amplitude
based on the number of measured electrons per camera pixel. Other scales do not change the measurement.
The imaging application could make use of up to two scanning directions. When scanning one direction while
collecting multiple A-scans, a 2-dimensional image is created. This is referred to as a B-scan. Here, the depth
information is typically displayed from top to bottom, while the scan axis is from left to right. Figure 18 shows a
B-scan data set.
Figure 18
B-Scan Data Set
