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Method for eliminating ghost image in endoscope system

An endoscope and ghost image technology, applied in the field of minimally invasive medical treatment, can solve problems such as affecting doctors' observation and surgery, and achieve the effects of eliminating ghost images, improving performance, and reducing surgical risks.

Active Publication Date: 2015-12-23
QINGDAO O MEC MEDICAL TECH
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The brightness of the ghost image is much lower than that of the normal image, and it does not affect the use under normal circumstances. However, if an instrument with strong surface reflection enters the field of view of the endoscope, a strong ghost image will be formed, which will affect the doctor's observation and operation. Therefore, it is also necessary to eliminate ghost images due to reflections on the surface of the protective window

Method used

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  • Method for eliminating ghost image in endoscope system
  • Method for eliminating ghost image in endoscope system
  • Method for eliminating ghost image in endoscope system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1: the endoscope rear protection window (11) is a meniscus surface protection window, the curvature radius of both surfaces is 50mm, and the camera system protection window (13) is located between the imaging assembly (12) and the image sensor (14) The space is the plane protection window and is perpendicular to the optical axis.

[0016] Working principle: the quasi-parallel light beam emitted by the endoscope meets the imaging conditions of the imaging component (12), and the imaging component (12) images the light beam on the image sensor (14). When the light beam I passes through the camera system protection window (13) When, in addition to most of the light beam transmission, part of the light beam is reflected to form a reflected light beam. After the first reflected light beam passes through the imaging component (12) and exits from the imaging component (12), the first reflected light beam is quasi-parallel light, and the first reflected light beam shi...

Embodiment 2

[0017] Embodiment 2: the endoscope rear protection window (11) is a meniscus surface protection window, and the radius of curvature of both surfaces is 70mm, and the camera system protection window (13) is located between the imaging assembly (12) and the image sensor (14) Between is the meniscus surface protection window, and the curvature radius of both surfaces is 70mm.

[0018] The working principle is similar to that of Embodiment 1, and will not be repeated here.

Embodiment 3

[0019] Embodiment 3: the rear protection window (11) of the endoscope is a plane protection window, and the included angle θ with the optical axis 1 =8°, the camera system protection window (13) is located between the imaging component (12) and the image sensor (14), is a plane protection window, and has an angle θ with the optical axis 1 =8°, the effective pixel diagonal length L of the image sensor is 5.6mm, and the focal length f of the imaging lens group is 20mm.

[0020] Working principle: the quasi-parallel light emitted by the endoscope meets the imaging conditions of the imaging component (12), and the imaging component (12) images the light beam on the image sensor (14). When the light beam passes through the protective window (13) of the camera system , except most of the light beams are transmitted, part of the light beams are reflected to form a reflected light beam. The rear protective window (11) of the endoscope, most of the light passes through the rear protec...

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Abstract

The invention relates to a method for eliminating a ghost image in an endoscope system and belongs to the technical field of minimally invasive medical treatment. The method comprises the step of changing the structure or position of a protective window piece, so that a surface reflection imaging position is not on an image sensor or beyond the effective pixel range of the image sensor even though on the image sensor. The method has the advantages that the purpose of eliminating the ghost image in the endoscope system can be achieved only by changing the shapes or positions of an endoscope protective window and a camera system protective window, the existing structure of the whole endoscope system is not affected, the performance of the endoscope system can be improved, the surgical risk is lowered, and the method is particularly suitable for being applied in an existing endoscope system to improve the imaging performance of the endoscope; in addition, the method for eliminating the ghost image in the endoscope system, particularly the ghost image in an optical system with a protective window can be applied to other similar optical systems to eliminate ghost images in the optical systems.

Description

technical field [0001] The invention relates to a method for eliminating ghost images in an endoscope system, belonging to the technical field of minimally invasive medical treatment. Background technique [0002] Rigid endoscopy systems include endoscopes, camera systems, and displays. Endoscopes need to undergo repeated cleaning, sterilization and disinfection processes in clinical applications. Due to the need for sterilization, the entire optical system of the endoscope needs to be completely sealed with two front and rear protective windows, and the camera system includes an imaging group, an image sensor and at least one protective window. Currently, the front and rear protective windows of the endoscope and the protective windows of the camera system are both flat surfaces. Since the outgoing light beam of the endoscope is parallel light, the surface reflections on the rear protection window of the endoscope and the protection window of the camera system will form s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B1/00A61B1/05
Inventor 田宝龙辜长明
Owner QINGDAO O MEC MEDICAL TECH
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