Eric L. Buckland,Al-Hafeez Z. Dhalla,Nestor O. Farmiga,Mehran Ghofrani,Robert H. Hart,Andrew Murnan,Christopher Saxer
申请号：
US14561772
公开号：
US09377291B2
申请日:
2014.12.05
申请国别(地区):
US
年份:
2016
代理人:
摘要：
An optical coherence tomography (OCT) system including a source of broadband optical radiation and a beamsplitter coupled to the source is provided. The beamsplitter divides the source radiation into a reference path and a sample path. The reference path includes an optical switch to switch the reference path between a first path having a first reference reflector at a first reference optical path length and a second path having a second reference reflector at a second reference optical path length, different from the first reference optical path length. The system further includes a beam combiner that mixes source radiation reflected from a subject in the sample path with source radiation returned from the first reference reflector during a first time interval and the second reference reflector during a second time interval. A detection system detects a first wavelength dependent interferogram during the first time interval and a second wavelength dependent interferogram during the second time interval. A processor preconditions the first and second wavelength dependent interferograms multiples the first preconditioned wavelength dependent interferogram and the second preconditioned wavelength dependent interferogram and computes a first A-scan from the first wavelength dependent interferogram a second A-scan from the second wavelength dependent interferogram a spatial offset between the first and second A-scans derived from the multiplicative product of the preconditioned first and second wavelength dependent interferograms and a combined A-scan from the first and second A-scans.
