Dual wavelength resampling system and method
First Claim
1. An optical coherence tomography (OCT) system comprising:
- a first light source configured to emit a first beam having a first wavelength;
a second light source configured to emit a second beam having a second wavelength;
an interferometer, wherein the first beam and the second beam are configured to be directed into the interferometer, and further wherein the interferometer comprises;
a reference path, andan interferometer sample path;
a detector configured to compare light from the reference path with light from the interferometer sample path and produce an imaging sample signal based on the comparison; and
a first splitter configured to split light from at least one of the first light source and the second light source, wherein the first splitter is located on a light path between the first light source and the interferometer;
a first wavelength reference filter having an equal interval frequency comb, wherein the wavelength reference filter is configured to produce a sequential clock waveform from light received from the first splitter; and
a signal processing circuit configured to resample the imaging sample signal based on the sequential clock waveform.
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Abstract
An optical coherence tomography (OCT) system combining multiple wavelengths is generally described. In an example, the OCT system includes multiple wavelength swept light sources. The system further includes an interferometer into which light from the light sources is directed and a detector configured to produce an imaging sample signal based on light received from the interferometer. The system also includes a splitter configured to split light from at least one of light sources before the light reaches the interferometer. The system also includes a wavelength reference filter having an equal interval frequency comb and a signal processing circuit. The wavelength reference filter is configured to produce a sequential clock waveform from light received from the splitter, and the signal processing circuit is configured to resample the imaging sample signal based on the sequential clock waveform.
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Citations
20 Claims
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1. An optical coherence tomography (OCT) system comprising:
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a first light source configured to emit a first beam having a first wavelength; a second light source configured to emit a second beam having a second wavelength; an interferometer, wherein the first beam and the second beam are configured to be directed into the interferometer, and further wherein the interferometer comprises; a reference path, and an interferometer sample path; a detector configured to compare light from the reference path with light from the interferometer sample path and produce an imaging sample signal based on the comparison; and a first splitter configured to split light from at least one of the first light source and the second light source, wherein the first splitter is located on a light path between the first light source and the interferometer; a first wavelength reference filter having an equal interval frequency comb, wherein the wavelength reference filter is configured to produce a sequential clock waveform from light received from the first splitter; and a signal processing circuit configured to resample the imaging sample signal based on the sequential clock waveform. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method comprising:
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emitting, from a first light source, a first beam having a first wavelength; emitting, from a second light source, a second beam having a second wavelength; splitting the first beam and the second beam; passing a first portion of a split beam to an interferometer; generating, using the interferometer, an image sample form the first portion of the split beam; passing a second portion of the split beam to a wavelength reference filter; generating a sequential clock waveform from the second portion of the split beam; and resampling the image sample using the sequential clock waveform. - View Dependent Claims (17, 18, 19, 20)
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Specification