In contrast to conventional, scanning OCT systems, the measured objects are not scanned in the case of volume acquisitions, but illuminated in a planar manner. Due to the parallelization phase-stable volumetric images are possible when measuring speed is sufficient.
As a result, many problems that are solved in the conventional OCT with elaborate setups can now be solved numerically during the data reconstruction, for example, the correction of a defocusing or other aberrations.