Systems and methods for deep spectroscopic imaging of biological samples with use of an interferometer and spectrometer
First Claim
1. A system for depth resolved spectroscopic imaging in deep tissue samples, the system comprising:
- a broad bandwidth light source configured to generate an illumination beam;
an interferometer comprising;
a first beam splitter configured to receive and to split the illumination beam into an incident beam and a reference beam;
an optical element configured to;
receive the incident beam that is offset in distance from an optical axis resulting in a beam converging towards a focal zone situated at a predefined distance beneath the surface of a biological sample, wherein the converging beam is centered at an offset angle relative to the corresponding central optical axis; and
receive light scattered from the biological sample centered about an offset angle substantially equal to that of the incident beam and offset in the opposite direction;
a second beam splitter configured to;
receive and superimpose the scattered light and reference beam to generate an interference beam such that the spatial extent of the reference beam limits the received scattered light to that which has originated from the focal zone of the optical element; and
a spectrometer configured to receive the interference beam; and
a processor that uses a spectral domain detection technique to assess one or more depth resolved tissue properties of the biological sample based on a spectral interference pattern of the interference beam.
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Accused Products
Abstract
Disclosed herein are systems and methods for deep spectroscopic imaging of a biological sample. In an aspect, a system includes a broad bandwidth light source configured to generate an illumination beam, an interferometer, and a spectrometer. The interferometer includes a first beam splitter configured to split the illumination beam into an incident beam and a reference beam; an optical lens directs the incident beam onto a biological sample at a predefined offset from corresponding optical axis, and receive a beam scattered from the biological sample. The beams are configured to intersect with each other within a focal zone of the optical lens. Photons of the incident beam undergo multiple forward scattering within the biological sample. A second beam splitter configured to receive and superimpose the scattered and reference beams, to generate an interference beam. The spectrometer uses a spectral domain detection technique to assess tissue properties of the biological sample.
108 Citations
29 Claims
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1. A system for depth resolved spectroscopic imaging in deep tissue samples, the system comprising:
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a broad bandwidth light source configured to generate an illumination beam; an interferometer comprising; a first beam splitter configured to receive and to split the illumination beam into an incident beam and a reference beam; an optical element configured to; receive the incident beam that is offset in distance from an optical axis resulting in a beam converging towards a focal zone situated at a predefined distance beneath the surface of a biological sample, wherein the converging beam is centered at an offset angle relative to the corresponding central optical axis; and receive light scattered from the biological sample centered about an offset angle substantially equal to that of the incident beam and offset in the opposite direction; a second beam splitter configured to; receive and superimpose the scattered light and reference beam to generate an interference beam such that the spatial extent of the reference beam limits the received scattered light to that which has originated from the focal zone of the optical element; and a spectrometer configured to receive the interference beam; and a processor that uses a spectral domain detection technique to assess one or more depth resolved tissue properties of the biological sample based on a spectral interference pattern of the interference beam. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method for depth resolved spectroscopic imaging in deep tissue samples, the method comprising:
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generating an illumination beam; splitting the illumination beam into an incident beam and a reference beam; using an optical element to receive the incident beam that is offset in distance from the optical axis to produce a beam converging towards a focal zone situated at a predefined distance beneath the surface of a biological sample, where the converging beam is centered at an offset angle relative to the corresponding optical axis; and receiving light scattered from the biological sample centered about an offset angle equal to that of the incident beam but offset in the opposite direction; using a second beam splitter to receive and superimpose the scattered light and reference beam to generate an interference beam such that the spatial extent of the reference beam limits the received scattered light to that which has originated from the focal zone of the optical element; superimposing the scattered and reference beams for generating an interference beam; and employing a spectral domain detection technique for assessing one or more depth resolved tissue properties of the biological sample based on a spectral interference pattern of the interference beam. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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Specification