Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Working distance-variable self-focusing OCT endoscope

A working distance, endoscopy technology, applied in endoscopy, medical science, surgery, etc., can solve the problems of reduced lateral resolution, affecting imaging quality, etc., and achieve the effect of compact structure

Inactive Publication Date: 2020-06-05
SHANGHAI JIAO TONG UNIV
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the surface of the sample tissue is usually not completely flat, and the endoscope with a fixed working distance will reduce the lateral resolution due to defocusing and affect the image quality. A self-focusing OCT endoscope with a variable working distance is proposed, using optical The near-infrared laser signal emitted and received by the coherence tomography itself is used as the basis for adjusting the working distance of the endoscope, realizing self-focusing optical coherence tomography (OCT) imaging with a variable working distance, and solving problems caused by uneven biological tissue surfaces or intestinal tissue Defocus phenomenon and image distortion caused by surface unevenness

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Working distance-variable self-focusing OCT endoscope
  • Working distance-variable self-focusing OCT endoscope
  • Working distance-variable self-focusing OCT endoscope

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Such as figure 1 with figure 2 As shown, it is a self-focusing endoscopic imaging device with variable working distance involved in this embodiment, which includes: a housing 4, a micro motor 7 and a lens cavity 12 arranged in the housing 4, which are sequentially arranged in the lens cavity 12 The internal beam collimator 5, achromatic lens 11, gradient index lens 10 and total reflection prism 6, wherein: the micro motor 7 is connected to the lens cavity 12 through the lead screw 8 respectively, and the signal line 14 and the cable 3 are respectively connected to the signal The processing module 16 is connected to the DC power supply 2 , and the laser light source 1 and the signal processing module 16 are respectively connected to the beam collimator 5 through a single-mode optical fiber 13 .

[0026] The casing 4 is provided with a transparent scanning window 9 .

[0027] A distance sensor 15 is provided between the signal processing module 16 and the beam collimat...

Embodiment 2

[0034] Such as figure 1 with image 3 As shown, the present embodiment relates to a liquid prism-based self-focusing optical coherence tomography endoscope device, including: a housing 24, a micro-motor 18 disposed in the housing 24 and a rotating scanning chamber 26, which are sequentially arranged in the rotating scanning chamber Reflector 19, aspheric lens 20, liquid lens 21, achromatic lens 22 and beam collimator 23 in 26, wherein: micromotor 18 receives starting signal through cable 28, and liquid lens 21 receives curvature control signal through signal line 17 , the beam collimator 23 receives the incident light through the fiber coupler 25 and the single-mode fiber 27 .

[0035] The shell 24 is provided with a transparent scanning window.

[0036] This embodiment relates to the imaging method of the above device, specifically including:

[0037] In the first step, the incident light passes through the single-mode optical fiber 27, passes through the fiber coupler 25,...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a working distance-variable self-focusing OCT endoscope. The endoscope comprises a shell, an OCT endoscope lens cavity and a micro motor, wherein the OCT endoscope lens cavityand the micro motor are arranged in the shell; an optical device is arranged in the OCT endoscope lens cavity and is used for outputting focused laser beams to penetrate the shell to irradiate a sample tissue, receiving reflected light of the sample tissue at the same time and outputting an signal; and the micro motor is connected with the inner wall of the shell and the OCT endoscope lens cavitythrough a lead screw sliding block to adjust the posture of the OCT endoscope lens cavity. By utilizing near-infrared laser signals emitted and received through optical coherence tomography as a basis for regulating a working distance of the endoscope, working distance-variable self-focusing optical coherence tomography imaging is realized, and an out-of-focus phenomenon and an image distortion phenomenon which are caused due to uneven surfaces of biological tissues and non-uniform surfaces of intestinal tissues are solved.

Description

technical field [0001] The invention relates to a technology in the field of medical equipment, in particular to a self-focusing optical coherence tomography (OCT) endoscope with variable working distance. Background technique [0002] Most of the existing endoscopes have a fixed working distance, that is, the distance from the endoscope lens to the focal point cannot be changed. However, because the surface of biological tissue is not completely flat or the surface of intestinal tissue is uneven, optical coherence tomography (OCT) endoscopes usually cannot focus accurately in real time during application, resulting in unclear imaging. Existing variable working distance endoscopes mostly use liquid prisms, and the curvature of the liquid prisms is changed by an applied voltage to achieve automatic focus and zoom functions. However, liquid prisms generally have a large diameter, generally more than 5mm, which is not conducive to the manufacture of micro-integration Endoscope...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): A61B1/05A61B1/00
CPCA61B1/00188A61B1/0019A61B1/05
Inventor 周传清刘宇熙柴新禹
Owner SHANGHAI JIAO TONG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com