Patent ID: 11933610
Assignee: NEC CORPORATION
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A swept-source optical coherence tomography (SS-OCT) apparatus comprising:
a plurality of wavelength-tunable light sources;
a first optical coupler configured to receive an output from each of the plurality of wavelength-tunable light sources, wherein the optical coupler is configured to split the received output from each of the plurality of wavelength-tunable light sources into a reference optical path and a sample optical path, and the sample optical path is configured to illuminate a sample;
a second optical coupler configured to receive return optical signals from each of the reference optical path and the sample optical path, wherein the second optical coupler is configured to output an optical interference signal;
a detector configured to detect the optical interference signal; and
a controller configured to receive an electrical signal based on the detected optical interference signal and generate an interference signal vector based on the received electrical signal, wherein the controller is configured to generate a depth profile vector of the sample based on the interference signal vector using compressed sensing,
wherein center wavelengths of the plurality of wavelength-tunable light sources are chosen such that mutual coherence of a transform matrix that transforms the depth profile vector to the interference signal vector is minimized.