US 12,465,210 B2
Optical coherence tomography system with an extended depth range
Utkarsh Sharma, Solon, OH (US)
Assigned to Alcon Inc., Fribourg (CH)
Filed by Alcon Inc., Fribourg (CH)
Filed on Oct. 31, 2022, as Appl. No. 18/051,317.
Claims priority of provisional application 63/281,531, filed on Nov. 19, 2021.
Prior Publication US 2023/0157538 A1, May 25, 2023
Int. Cl. A61B 3/10 (2006.01); G01B 9/02 (2022.01)
CPC A61B 3/102 (2013.01) [G01B 9/02 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An optical coherence tomography (OCT) system, comprising:
a light source configured to provide a light beam;
a beamsplitter configured to split the light beam into a sample beam and a reference beam;
one or more optical elements configured to direct the sample beam along a sample path towards a sample, the sample path comprising a plurality of sample path ranges, the sample reflecting the sample beam to yield a reflected sample beam;
a reference arm system configured to direct the reference beam through each reference arm of a plurality of reference arms to yield a reflected reference beam, each reference arm corresponding to a sample path range of the plurality of sample path ranges, each reference arm associated with a specific dispersion level with a corresponding dispersion compensation parameter set, the dispersion compensation parameter set designed to address the specific dispersion level;
a detector configured to:
detect the reflected sample beam and the reflected reference beam; and
generate a detector signal in response to detecting the reflected sample beam and the reflected reference beam; and
a computer configured to:
perform the following for each sample path range of the plurality of sample path ranges to yield image information for the sample path ranges:
select the dispersion compensation parameter set corresponding to the reference arm of the sample path range;
apply the dispersion compensation parameter set to the detector signal to yield image information; and
process the image information to yield image information for the sample path range; and
generate an image of the sample from the image information for the plurality of sample path ranges, the image being generated based on image information that is processed with a plurality of dispersion compensation parameter sets that correspond to the plurality of sample path ranges.