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Linear OCT

  • G. Hüttmann
  • P. Koch
  • R. Birngruber
Part of the Biological and Medical Physics, Biomedical Engineering book series (BIOMEDICAL)

Optical coherence tomography (OCT) determines the distances of scattering structures by interferometry in order to reconstruct A-scan and B-scan images of three-dimensional objects. In time domain OCT (TD-OCT) the intensity at the output of the interferometer is measured with a point detector, while the optical path length in one interferometer arm is changed [1]. As an approach to avoid moving parts, linear OCT (L-OCT) employs a parallel detection scheme to measure the interference by introducing spatially varying path length differences on an array of individual detectors. According to Fig. 14.1 L-OCT is one of the four basic groups of OCT systems, which can be distinguished by the measured parameter (interference pattern or spectrum) and the type of acquisition (time-dependent point measurement or spatially multiplexed parallel measurement). TD-OCT and L-OCT measure an interference pattern, whereas spectral or Fourier domain OCT (FD-OCT) [2, 3] and swept source OCT (SS-OCT) [2,4], which is also named optical frequency domain imaging (OFDI), measure the cross-correlation spectrum, which is converted to the A-scan by a Fourier transform.

Keywords

Optical Coherence Tomography Interference Pattern Image Sensor Shot Noise Modulation Transfer Function 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2008

Authors and Affiliations

  • G. Hüttmann
  • P. Koch
  • R. Birngruber

There are no affiliations available

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