Optical coherence computed tomography
A system, method, and device for imaging a sample. In embodiments, a light from a low-coherence source or a wavelength-swept source is used to illuminate the sample. Pathlength-resolved intensity profiles of the light reemitted from the sample are recorded and measurements are taken. A reconstruction algorithm is used to invert the pathlength-resolved measurements to form an image.
1. An optical coherence computed tomography device, comprising:
a light source;
a first optical fiber coupler configured to split a light into a first light and a second light, the second light going through a reference arm;
a first fiber tip configured to direct the first light to a surface of a sample, wherein the first fiber tip is further configured to be scanned to illuminate different locations on a surface of the sample;
a second optical fiber coupler configured to collect reemitted light; and
a second fiber tip configured to be scanned to measure light reemitted from the different locations on the surface of the sample, wherein the first fiber tip and the second fiber tip are mounted on translation stages;
wherein the measurement is inverted to form an image.
2. The optical coherence computed tomography device according to claim 1 , wherein the light source is a broadband superluminescent diode.
3. The optical coherence computed tomography device according to claim 1 , wherein the light source is a mode-locked Ti-Sapphire laser.
4. The optical coherence computed tomography device according to claim 1 , wherein the light source is a wavelength-swept laser.
5. The optical coherence computed tomography device according to claim 1 , further comprising a first imaging system configured to direct the first light from the first fiber tip to the sample.
6. The optical coherence computed tomography device according to claim 1 , wherein the reference arm includes a second imaging system.
7. The optical coherence computed tomography device according to claim 6 , wherein the second imaging system is coupled to a second arm of the second optical fiber coupler.
8. The optical coherence computed tomography device according to claim 6 , wherein the second imaging system is configured to direct a portion of light from the source to interfere with the reemitted light from the sample.