A kind of double magnet single fiber optic endoscope scanning probe and its preparation method

Abstract

The invention provides a scanning probe for a double-magnet single-fiber endoscope and a preparation method thereof, wherein: a fixed support is clamped at the end of a ring-shaped hose, and a slender single optical fiber is fixed inside; two cylindrical magnets are fixed on the thin On the long single fiber, the up and down movement of the magnet drives the deformation and vibration of the slender single fiber; the lens is fixed at one end of the slender single fiber, and scans up and down with the vibration of the fiber; the fixed support is located at the other end of the slender single fiber Department; the inclined helical coil is fixed on the surface of the annular hose. When a certain amount of AC voltage is applied to the inclined helical coil, a magnetic field is generated inside the annular hose, and the two magnets are pushed up and down, causing the elongated single fiber to deform, and when the frequency of the applied voltage is consistent with the resonant frequency of the fiber-magnet When the distal end of the optical fiber and the lens are driven to perform spiral resonance scanning in the XOY plane, the large-scale vibration scanning and high-precision imaging of the endoscope scanning probe can be realized.

Description

technical field [0001] The invention relates to the field of micro-electro-mechanical systems (MEMS), in particular to an endoscope scanning probe capable of realizing large-scale high-precision scanning by using electromagnetic drive to realize the deformation of a slender single optical fiber and a preparation method thereof. Background technique [0002] As a key medical device for collecting, analyzing information and assisting treatment, medical endoscope is getting more and more attention in the field of medical treatment and detection. The earliest medical endoscopes were hard metal tubes, which often brought great trauma and pain to patients when they entered the narrow passages in the human body. Many researchers use a bundle of optical fibers wrapped in a flexible tube with a diameter of less than 1 mm as the probe of a flexible endoscope to observe some small blood vessels and special thinner lumens. However, since the number of optical fibers that can be accommo...

AI Technical Summary

Problems solved by technology

It can be seen that the overall diameter of the above-mentioned piezoelectric-driven single-fiber endoscope is still greater than 1 mm, and it cannot easily enter some thinner cavities in the human body for in-situ monitoring and corresponding auxiliary treatment in vivo, and the tiny structure Piezoelectric drivers are also relatively difficult in processing and manufacturing technology. At present, it is not recommended to widely use PZT, which is harmful to the environment (because it contains lead), as piezoelectric materials in the world.

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