Spectroscope for recovering light from re-entrant zone of arterial wall
First Claim
Patent Images
1. A spectroscope for spectroscopic analysis of a sample of tissue within a blood vessel wall, the spectroscope comprising:
- a catheter;
a first optical fiber extending through the catheter;
a second optical fiber extending through the catheter;
a first optical system in optical communication with the first optical fiber for directing light form the first optical fiber to the illumination spot on the wall of a blood vessel; and
a second optical system including at least one optical element with a finite focal length in optical communication with the second optical fiber,wherein the second optical system is configured to modify a field of view of the second optical fiber so that the modified field of view overlaps an annular re-entrant zone radially separated from the illumination spot by a specular zone predominantly made up of light specularly reflected from the wall, while avoiding the specular zone.
5 Assignments
0 Petitions
Accused Products
Abstract
A spectroscope includes an optical fiber extending through a catheter, and in communication with an optical system. The optical system has a finite focal length.
47 Citations
29 Claims
-
1. A spectroscope for spectroscopic analysis of a sample of tissue within a blood vessel wall, the spectroscope comprising:
-
a catheter; a first optical fiber extending through the catheter; a second optical fiber extending through the catheter; a first optical system in optical communication with the first optical fiber for directing light form the first optical fiber to the illumination spot on the wall of a blood vessel; and a second optical system including at least one optical element with a finite focal length in optical communication with the second optical fiber, wherein the second optical system is configured to modify a field of view of the second optical fiber so that the modified field of view overlaps an annular re-entrant zone radially separated from the illumination spot by a specular zone predominantly made up of light specularly reflected from the wall, while avoiding the specular zone. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
-
-
25. A method for spectroscopic analysis of a sample of tissue within a blood vessel wall, the method comprising:
-
inserting a catheter into the blood vessel, the catheter having first and second optical fibers extending therethrough, a first optical system in optical communication with the first optical fiber, and a second optical system in optical communication with the second optical fiber, the second optical system including at least one optical element with a finite focal length in optical communication with the second optical fiber; directing light from the first optical fiber to an illumination spot on the wall of the blood vessel; using the second optical system to modify a field of view of the second optical fiber so that the modified field of view overlaps an annular re-entrant zone radially separated from the illumination spot by a specular zone predominantly made up of light specularly reflected from the wall, while avoiding the specular zone; collecting light within the modified field of view of the second optical system and transmitting it via the second optical fiber; and analyzing the transmitted light. - View Dependent Claims (26, 27, 28, 29)
-
Specification