Patent ID: 9562759
Date: 2017-02-07
CPC Classifications: A61B,G01B

Claim:
1. A device for optical coherence tomography, or OCT, the device comprising: a light generator adapted to: a single dispersive medium having an input optically coupled to the light generator and an output for output pulses, the dispersive medium being adapted to stretch the input pulse width to an output pulse width of each of the output pulses by chromatic dispersion, the dispersive medium comprising a plurality of taps at different positions along the length of the dispersive medium to provide different dispersion; an optical coupler adapted to couple the output pulses from the output into a reference arm and into a sample arm, and to superimpose light returning from the reference arm and from the sample arm; an optical switch adapted to change the axial scanning depth independently of the axial resolution by selectively coupling the light generator to one of the taps as the input or by selectively coupling one of the taps as the output to the optical coupler; and a detector adapted to detect an intensity of interference of the superimposed light with a temporal resolution of a fraction of the output pulse width.