OCT using spectrally resolved bandwidth
First Claim
1. An apparatus for studying an object based on at least one of polarization, space, position or angle of light that has reflected from the object comprising:
- an optical tomographic instrumentation including a light source coupled to a source path, a sample path, a reference path, and a detection path, wherein the light source generates a spectrally resolved bandwidth; and
the spectrally resolved bandwidth includes a plurality of spectrally resolved cells and a detector in the detection path for analyzing light reflected from an object in the sample path and the light reflected in the reference path based upon at least one of the polarization, spatial relationship, position or angle domains, wherein an optical coherence tomography A-scan for the object being imaged is selected by the ratio of Ninstrument/NA-scan=Δ
Tinstrument/Δ
TA-scan for the polarization, space, position or angle domain.
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Abstract
An apparatus is disclosed for studying an object based on at least one of polarization, space, position or angle of light that has reflected from the object. An optical tomographic instrumentation of the apparatus includes a light source coupled to a source path, a sample path, a reference path, and a detection path, wherein the light source generates a spectrally resolved bandwidth. The spectrally resolved bandwidth includes a plurality of spectrally resolved cells and a detector in the detection path for analyzing light reflected from an object in the sample path and the light reflected in the reference path based upon at least one of the polarization, spatial relationship, position or angle domains.
153 Citations
25 Claims
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1. An apparatus for studying an object based on at least one of polarization, space, position or angle of light that has reflected from the object comprising:
an optical tomographic instrumentation including a light source coupled to a source path, a sample path, a reference path, and a detection path, wherein the light source generates a spectrally resolved bandwidth; and
the spectrally resolved bandwidth includes a plurality of spectrally resolved cells and a detector in the detection path for analyzing light reflected from an object in the sample path and the light reflected in the reference path based upon at least one of the polarization, spatial relationship, position or angle domains, wherein an optical coherence tomography A-scan for the object being imaged is selected by the ratio of Ninstrument/NA-scan=Δ
Tinstrument/Δ
TA-scan for the polarization, space, position or angle domain.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An apparatus for studying an object based on the angle of light reflected from the object comprising:
- a multi-fiber angle-domain optical coherence tomography system, including a light source coupled to a source path, a reference path, a sample path, and a detection path; and
a detector in the detection path for analyzing the light reflected from an object in the sample path and the light reflected from the reference path based upon the angle domain, wherein the light source comprises a frequency swept source split into a plurality of fibers through a splitter and a circulator;
the plurality of fibers include at least one sample path to the object and a reference reflector at the terminal end of each of the plurality of fibers; and
at least one of an interference fringe is formed from each of the plurality of fibers corresponding to an incident angle (α
i) and a backscattered angle (β
j,) and a light intensity in the spectral domain that is converted to a voltage through a photoreceiver. - View Dependent Claims (15, 16, 17)
- a multi-fiber angle-domain optical coherence tomography system, including a light source coupled to a source path, a reference path, a sample path, and a detection path; and
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18. A method for studying an object by optical tomographic instrumentation comprising the steps of:
- providing a spectrally resolved bandwidth of light equivalent to a plurality of spectrally resolvable cells by an optical tomographic instrumentation including a light source coupled to a source path, a reference path, a sample path, and a detection path; and
analyzing the light in the detection path that has reflected from the object in the sample path and the light reflected from the reference path based on the polarization, space, position or angle domain, and imaging an optical coherence tomography A-scan for the object being imaged by selecting the ratio of Ninstrument/NA-scan=Δ
τ
instrument/Δ
τ
A-scan for the polarization, space, position or angle domain. - View Dependent Claims (19, 20, 21, 22, 23)
- providing a spectrally resolved bandwidth of light equivalent to a plurality of spectrally resolvable cells by an optical tomographic instrumentation including a light source coupled to a source path, a reference path, a sample path, and a detection path; and
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24. A method for studying an object with a multi-fiber angle-domain optical coherence tomography system comprising the steps of producing light from a frequency swept source coupled to a source path, a reference path, a sample path, and a detection path;
- and analyzing the light in the detection path that has reflected from the object in the sample path and the light that has reflected from the reference path based on the angle domain, splitting the output of the frequency swept source into a plurality of fibers through a splitter and a circulator and outputting to the sample path and the reference path in each of the plurality of fibers, wherein the plurality of fibers include at least one sample path to the object and a reference reflector at the terminal end of each of the plurality of fibers; and
forming at least one of an interference fringe from each of the plurality of fibers corresponding to an incident angle (α
i) and a backscattered angle (β
j,) and a light intensity in the spectral domain that is converted to a voltage through a photoreceiver. - View Dependent Claims (25)
- and analyzing the light in the detection path that has reflected from the object in the sample path and the light that has reflected from the reference path based on the angle domain, splitting the output of the frequency swept source into a plurality of fibers through a splitter and a circulator and outputting to the sample path and the reference path in each of the plurality of fibers, wherein the plurality of fibers include at least one sample path to the object and a reference reflector at the terminal end of each of the plurality of fibers; and
Specification