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Endoscopic OCT (optical coherence tomography) probe with operating distance being capable of automatically and continuously adjusted

A distance and workbench technology, applied in endoscopy, medical science, diagnosis, etc., can solve the problems of optical information attenuation, adjusting the size and position of the airbag, and reducing the signal-to-noise ratio

Active Publication Date: 2014-10-15
北京乐普智影科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of probe has problems such as the need to manually adjust the size and position of the airbag, which brings inconvenience to the doctor during work and post-work processing; in addition, although the airbag is a transparent material, there must be light in the transmission process. The attenuation of information and the reduction of signal-to-noise ratio lead to inaccurate information such as canceration obtained by the computer; the selection of materials for the airbag itself has certain restrictions, and the body tissue has certain rejection, so the airbag material should have biocompatibility and many other restrictions

Method used

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  • Endoscopic OCT (optical coherence tomography) probe with operating distance being capable of automatically and continuously adjusted
  • Endoscopic OCT (optical coherence tomography) probe with operating distance being capable of automatically and continuously adjusted
  • Endoscopic OCT (optical coherence tomography) probe with operating distance being capable of automatically and continuously adjusted

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Effect test

Embodiment approach 1

[0049] A concave lens 11 with a fixed focal length is added behind the triangular prism 4 of the endoscopic OCT probe, so that the originally converged light spots emerge as parallel light. The parallel light enters the automatic focusing system 9 composed of convex lenses with different focal lengths on the displacement table 5 . First, the current position information is obtained through the ultrasonic ranging probe 3, and the obtained position information is the position of the spot to be adjusted, and then the computer outputs control signals according to different position information to control the comb-shaped electrostatic drive 7 in the X and Y directions respectively , 8 and electromagnetic motor driver 6 work.

[0050] There is a movable workbench 5 in the Y direction, which is connected with the base 7 below through slide rails, and the micro-electromagnetic motor driver 6 placed on the base 7 receives the control signal to generate the precise number of rotations. ...

Embodiment approach 2

[0054] According to the principle of scheme 1, it is only necessary to make a fully convex lens to satisfy the continuous movement of the light spot in the direction of the optical axis. Scheme 2 does not use a concave lens to generate parallel light, but makes a lens group with both a convex lens and a concave lens. The light emitted by the triangular prism 4 directly enters the autofocus optical system 4 on the workbench 5 without adding a concave lens 11 . First, according to the thin lens imaging formula

[0055] Export image distance as

[0056]

[0057] So the spot distance is

[0058]

[0059] The image distance becomes

[0060]

[0061] and the spot distance will become

[0062]

[0063] Obviously, the direction of the spot movement is affected by the Δx of the lens movement and the change of the image distance The influence of two aspects, so the image of the change of the working distance is observed through the analytical method, and the three-dimen...

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Abstract

The invention provides an endoscopic OCT (optical coherence tomography) probe with the operating distance being capable of automatically and continuously adjusted. An ultrasonic distance measurement probe (3) is added in the endoscopic OCT probe, which is used for obtaining the position information of internal tissue relative to the probe; a computer processes the obtained position information, and outputs different control signals according to different position information, so as to control a miniature electromagnetic motor driver (6) and comb electrostatic drivers (7 and 8), to realize the two dimensional change of the position of a lens system (9) with different focus lens on an operating platform (5), and to ensure that the operating distance of the endoscopic OCT probe can be automatically and continuously adjusted.

Description

technical field [0001] The invention relates to an endoscopic OCT probe, in particular to an endoscopic OCT probe whose working distance can be automatically and continuously adjusted. Background technique [0002] Micro-opto-electro-mechanical system MOEMS (Micro-opto-electro-mechanical Systems) is an important direction of MEMS (micro-electro-mechanical systems) technology. structural system. Micro-opto-electromechanical system is a controllable micro-optical system. Under the action of microelectronics and micro-mechanical devices, the micro-optical components of the system can control the convergence, diffraction, reflection, etc. of light beams, so as to finally realize optical switching, attenuation , scanning, imaging and other functions. [0003] Optical coherence tomography (Optical coherence tomography, OCT) is an imaging technology that has developed rapidly in the past decade. OCT endoscope is a combination of medical electronic endoscope and OCT technology, w...

Claims

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Application Information

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IPC IPC(8): A61B1/05
Inventor 周智峰白宝平邹慧玲张澍田
Owner 北京乐普智影科技股份有限公司