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

Fiber-optic scanning head and driving method thereof

An optical fiber scanning and optical fiber technology, applied in medical science, diagnosis, endoscopy, etc., can solve the problems of low imaging signal-to-noise ratio and impact on imaging quality, achieve convenient coupling, increase line scanning range, and simple manufacturing method Effect

Inactive Publication Date: 2009-06-03
HUAZHONG UNIV OF SCI & TECH
View PDF1 Cites 31 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the scanning trajectory of the probe is a Lissajous figure, and the signal-to-noise ratio of the imaging is not very high, which will have a great impact on the quality of the imaging

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
  • Fiber-optic scanning head and driving method thereof
  • Fiber-optic scanning head and driving method thereof
  • Fiber-optic scanning head and driving method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Embodiment 1: Fabrication of an optical fiber scanning probe. Proceed as follows

[0054] 1. Take two piezoelectric ceramic sheets 2 with a length of 50 mm, a width of 0.2 mm, and a thickness of 0.2 mm coated with an electrode layer 1 on one side, and a thin copper sheet 3 with a thickness of 53 mm in length, a width of 0.6 mm, and a thickness of 0.1 mm. One piece, using epoxy resin to bond two piezoelectric ceramic sheets 2 in parallel on the copper sheet 3, one end of the piezoelectric ceramic sheet 2 is flush with the end of the copper sheet 3, and the distance between the two piezoelectric ceramic sheets 2 is 0.2 mm.

[0055] 2. Remove the 30-40mm coating from the end of a single-mode optical fiber to expose the bare optical fiber 4, cut the end face of the optical fiber flat with an optical fiber cutter, place the optical fiber 4 in the gap between two piezoelectric ceramic sheets, and reserve a length of 10mm (The resonant frequency is about 1KHz) As the vibratio...

Embodiment 2

[0059] Embodiment 2: An endoscopic fluorescence imaging system is formed by using an optical fiber scanning probe. The schematic diagram of the endoscopic fluorescence imaging system is shown in Figure 9 shown.

[0060] 1. After the optical fiber scanning probe is manufactured as in the first step of the embodiment, it is inserted into a stainless steel tube 6 with a diameter of 2mm. One end of the stainless steel tube 6 is pre-installed with a micro-convex lens 7 for focusing the outgoing light of the optical fiber and collecting fluorescence.

[0061] 2. Adjust the position of the optical fiber scanning probe in the stainless steel tube 6 so that the axis of the optical fiber coincides with the optical axis of the lens 7, and adjust the distance between the optical fiber 4 and the lens 7 to a suitable distance, and then use epoxy resin 8 to connect the lead end of the optical fiber probe to the stainless steel tube 6 glued together.

[0062] 3. Put the signal leads of the...

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

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Login to View More

Abstract

The invention relates to a fiber-optic scanning head and the driving method thereof. The fiber-optic scanning head is characterized in that two piezoelectric ceramic pieces plated with electrode layers are symmetrically and parallelly spliced on a thin conductive substrate which is free from inverse piezoelectric effect; a section of bare optical fiber, which is free from coating layer at the tail end and is provided with a suitable structure on the end surface and is spliced between the two piezoelectric ceramic pieces; a bare optical fiber in appropriate size is reserved, so as to be served as a vibration free end; the electrods of the two piezoelectric ceramic pieces have access to driving signals; the driving signals are formed by the superposition of a sawtooth wave and a sine wave; the sawtooth wave ensures that an identical elongation or shortening amount are produced by two piezoelectric ceramic pieces at the same time, so that position of the fiber-optic end is driven to move, and the field scanning action is finished; the sine wave ensures that a tiny length difference is produced by the two piezoelectric ceramic pieces, so as to produce a slight swing which is parallel to the thin conductive substrate, the optical fiber enables to produce a resonance with a greater amplitude, and the line scanning action can be finished. The fiber-optic scanning head has the advantages that the structure is simple, and the volume of the probe is reduced effectively. Therefore, the scanning of the probe is more stable, and the phenomenon of the non-uniform imaging quality is eliminated.

Description

technical field [0001] The invention belongs to the technical field of optical scanning imaging, in particular to an optical fiber scanning probe and a driving method thereof. Background technique [0002] Optical imaging can not only realize non-invasive, non-invasive, non-ionizing radiation and real-time detection and imaging of living tissues, but also can be used for structural analysis of living biological tissues, measurement of characteristic parameters, and diagnosis and treatment of diseases, and its development momentum is rapid. In order to better observe the structure of biological tissue, optical scanning technology came into being. Representative optical scanning imaging techniques include optical coherence tomography (Optical Coherence Tomography), confocal microscopy imaging, and two-photon excited fluorescence imaging. Optical coherence tomography has excellent characteristics such as fast imaging and high resolution, and is of great significance to biologi...

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): A61B1/07A61B5/00
Inventor 骆清铭刘志海曾绍群付玲
Owner HUAZHONG UNIV OF SCI & TECH
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