Spectroscopy of deeply-scattered light
First Claim
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1. A spectroscope comprising:
- first and second fibers, one of which defines a longitudinal axis;
a first fixed beam-redirector in optical communication with the first fiber, the first beam-redirector being oriented to illuminate a first area having a center;
a second fixed beam-redirector in optical communication with the second fiber and axially separated along the longitudinal axis from the first beam-redirector by a first separation distance, the second beam-redirector being oriented to illuminate a second area having a center axially separated from the center of the first area along the longitudinal axis by a second separation distance that exceeds the first separation distance by a fixed amount.
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Abstract
A spectroscope includes first and second beam redirectors in optical communication with first and second fibers respectively. The first and second beam redirectors are oriented to illuminate respective first and second areas. The second area is separated from the first area by a separation distance that exceeds the separation distance between the first and second beam redirectors.
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Citations
29 Claims
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1. A spectroscope comprising:
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first and second fibers, one of which defines a longitudinal axis; a first fixed beam-redirector in optical communication with the first fiber, the first beam-redirector being oriented to illuminate a first area having a center; a second fixed beam-redirector in optical communication with the second fiber and axially separated along the longitudinal axis from the first beam-redirector by a first separation distance, the second beam-redirector being oriented to illuminate a second area having a center axially separated from the center of the first area along the longitudinal axis by a second separation distance that exceeds the first separation distance by a fixed amount. - 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 collecting light scattered from behind an arterial wall, the method comprising:
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providing an illumination beam redirector and a collection beam redirector axially separated from each other by a first distance along a longitudinal axis; illuminating an illumination spot on the arterial wall, the illumination spot having a center; pointing a collection-beam redirector toward a collection spot, the collection spot having a center axially separated along the longitudinal axis from the center of the illumination spot by a second distance that exceeds the first distance by a fixed amount; and recovering scattered light incident on the collection-beam redirector. - View Dependent Claims (20, 21, 22, 23)
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24. A method for collecting light scattered from behind an arterial wall, the method comprising:
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providing an illumination beam redirector and a collection beam redirector axially separated from each other by a first distance along a longitudinal axis; pointing the collection-beam redirector at a collection spot on the wall; pointing the delivery-beam redirector toward an illumination spot on the wall in a direction away from the collection spot; passing light through the delivery-beam redirector; and recovering scattered light incident on the collection-beam redirector wherein a center of the collection spot and a center of the illumination spot are axially separated from each other along the longitudinal axis by a second distance that exceeds the first distance by a fixed amount. - View Dependent Claims (25, 26, 27, 28)
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29. A spectroscope comprising:
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first and second fibers, one of which defines a longitudinal axis; a first fixed beam-redirector in optical communication with the first fiber, the first beam-redirector being oriented to illuminate a first area; a second fixed beam-redirector in optical communication with the second fiber the second beam-redirector being oriented to illuminate a second area axially separated from the first area along the longitudinal axis by an axial separation distance that increases with distance from the spectroscope.
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Specification