Simple monolithic optical element for forward-viewing spectrally encoded endoscopy

Patent metadata

Field	Value
Publication number	US-10551245-B2
Application number	US-201715430205-A
Country	US
Kind code	B2
Filing date	Feb 10, 2017
Priority date	Feb 12, 2016
Publication date	Feb 4, 2020
Grant date	Feb 4, 2020

Abstract

Exemplary spectrally encoded probes are provided having forward view capabilities. These probes are configured such that the detection element comprises a plurality of light collecting components, where the distal ends at least partially surround the illumination element and the proximal ends form a linear array that is optically connected to a dispersive component.

First claim

What is claimed is:

1. A probe having a proximal end and a distal end, and configured for spectrally encoded endoscopy (SEE) imaging, comprising:
an illumination element comprising: a light guiding component; a first light focusing component; and a first dispersive component, arranged in this order along a probe axis from the proximal end to the distal end thereof; and
a detection element comprising: a plurality of light collecting components; a second dispersive component; and a second light focusing component,
wherein the illumination element is configured to rotate around the probe axis while the plurality of light collecting components remains stationary relative to the rotatable illumination element,
wherein the distal ends of the plurality of light collecting components are arranged in a circle around the distal end of the illumination element to at least partially surround the first dispersive component, and
wherein the proximal ends of the plurality of light collecting components form a linear array that is optically connected to the second dispersive component.

2. The probe of claim 1 , wherein the plurality of light collecting components are multi-modal (MM) optical fibers.

3. The probe of claim 2 , wherein the plurality of MM optical fibers comprises at least six MM optical fibers.

4. The probe of claim 2 , wherein the distal ends of the plurality of MM optical fibers form a ring around the illumination element.

5. The probe of claim 2 , wherein the numerical aperture of the plurality of MM optical fibers covers the entire field of view of the illumination element.

6. The probe of claim 1 , further comprising a rotary junction configured to rotate the illumination element relative to the detection element.

7. The probe of claim 6 , wherein the detection element is not rotated by the rotary junction.

8. The probe of claim 1 , further comprising:
a rotating tube having the illumination element fixedly arranged thereinside; and
a non-rotating tube having the plurality of light collecting components fixedly attached to the outer surface thereof,
wherein the rotating tube and the non-rotating tube are arranged coaxially between the illumination element and the plurality of light collecting components.

9. The probe of claim 1 , wherein the second dispersive component is a spectrometer.

10. The probe of claim 9 , wherein the linear array corresponds to an entrance slit of the spectrometer.

11. The probe of claim 1 , wherein the detector is a line scan sensor.

12. The probe of claim 11 , wherein the line scan sensor comprises rectangular pixels with the longer dimension of the rectangular pixels perpendicular to a grating vector of the second dispersive component.

13. An endoscopic imaging system, comprising:
a light source;
an illumination element configured to illuminate a sample;
a detection element configured to collect light from the sample;
a rotary junction configured to rotate the illumination element relative to the detection element;
a detector configured to detect light collected by the detection element; and
a processor configured to process data from the detector to form an image,
wherein the illumination element and the detection element are arranged in a probe having a proximal end and a distal end,
the illumination element comprising: a light guiding component, a first light focusing component, and a first dispersive component; arranged along the probe axis in this order from the proximal end to the distal end,
the detection element comprising: a plurality of light collecting components; a second dispersive component; and a second light focusing component,
wherein the illumination element is configured to rotate around the probe axis while the plurality of light collecting components remains stationary relative to the rotatable illumination element,
wherein the proximal ends of the plurality of light collecting components form a linear array that is optically connected to the second dispersive component, and
wherein the distal ends of the plurality of light collecting components are arranged in a circle around the distal end of the illumination element to at least partially surround the first dispersive component.

14. The imaging system of claim 13 , wherein the plurality of light collecting components are multi-modal (MM) optical fibers.

15. The imaging system of claim 14 , wherein the plurality of MM optical fibers comprises at least six MM optical fibers.

16. The imaging system of claim 14 , wherein the distal ends of the plurality of MM optical fibers form a ring around the first dispersive component.

17. The imaging system of claim 14 , wherein the numerical aperture of the plurality of MM optical fibers covers the entire field of view of the illumination element.

18. The imaging system of claim 13 , further comprising:
a rotating tube having the illumination element fixedly arranged thereinside; and
a non-rotating tube having the plurality of light collecting components fixedly attached to the outer surface thereof,
wherein the rotating tube and the non-rotating tube are arranged coaxially between the illumination element and the plurality of light collecting components.

19. The imaging system of claim 13 , wherein the second dispersive component is a spectrometer.

20. The imaging system of claim 19 , wherein the linear array corresponds to an entrance slit of the spectrometer.

21. The imaging system of claim 13 , wherein the detector is a line scan sensor comprising rectangular pixels with the longer dimension of the rectangular pixels perpendicular to a grating vector of the second dispersive component.

22. The imaging system of claim 13 ,
wherein the probe is a forward viewing SEE probe, and
wherein the first dispersive component is configured to diffract light such that at least one diffracted wavelength propagates substantially along the probe optical axis, where the probe optical axis is the axis extending along the direction of propagation of a light provided from the light guiding component through the first light focusing component.

23. The probe of claim 1 ,
wherein the probe is a forward viewing SEE probe, and
wherein the first dispersive component is configured to diffract light such that at least one diffracted wavelength propagates substantially along the probe optical axis, where the probe optical axis is the axis extending along the direction of propagation of a light provided from the light guiding component through the first light focusing component.

Assignees

• Canon Usa Inc
• Massachusetts Gen Hospital

Inventors

• Do Dukho
• Kang Dongkyun
• Ikuta Mitsuhiro
• Tearney Guillermo J

Classifications

• A61B1/00096

  Optical elements · CPC title

• A61B1/00165

  with light-conductive means, e.g. fibre optics (A61B1/07 takes precedence) · CPC title

• A61B1/0638

  providing two or more wavelengths · CPC title

• A61B1/00167

  Details of optical fibre bundles, e.g. shape or fibre distribution · CPC title

• A61B1/0669

  at proximal end of an endoscope · CPC title