Endoscope objective lens zoom optical system

An optical system and endoscope technology, which is applied in the field of bifocal objective lens zoom optical system, can solve the problems that diagnosis and follow-up surgery cannot be performed at the same time, and endoscopic equipment is expensive

Inactive Publication Date: 2020-03-10
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, this type of endoscopic equipment is expensive, and the confocal microendoscope is a probe-type structure that needs to enter the body through the clamp channel of a standard endoscope, so diagnosis and follow-up surgery cannot be performed at the same time

Method used

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  • Endoscope objective lens zoom optical system
  • Endoscope objective lens zoom optical system
  • Endoscope objective lens zoom optical system

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Embodiment Construction

[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described more clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described implementation Examples are part of the present invention, not all embodiments.

[0038] FIG. 1 is a cross-sectional configuration diagram showing an objective zoom optical system of an endoscope according to the present embodiment. here, Figure 1A It is a cross-sectional structural view showing the zoom optical system of the endoscope objective lens in a normal observation state. Figure 1B It is a cross-sectional structural view showing the zoom optical system of the endoscope objective lens in a magnified observation state.

[0039] The fixed lens group G1 has negative power. The negative focal power of the fixed lens group clos...

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Abstract

The invention discloses an endoscope objective lens zoom optical system, which sequentially comprises a fixed lens group with negative focal power and a zoom lens group with positive focal power alongthe optical axis of the optical system from the object side to the image side, wherein the zoom lens group can change the focal length of the endoscope objective lens zoom optical system by moving along the optical axis. The invention relates to a high-performance endoscope objective lens optical system which has a large enough magnification factor and can perform 500-1000-time microscopic magnification observation under an endoscope. During common observation, the field angle of the endoscope lens can reach 140 degrees, and accurate imaging diagnosis can be carried out on diseased tissues ofa human body.

Description

technical field [0001] The invention relates to an endoscope objective lens zoom optical system, in particular to a bifocal objective lens zoom optical system applied to an endoscope for medical diagnosis. Background technique [0002] As a clinical application of high-performance endoscopes, there are dual functional requirements for microscopic magnification observation and large-field high-definition imaging. Especially for the observation and diagnosis of early diseases inside the human body, endoscopes integrating magnification observation and high-definition imaging have been more and more widely used. [0003] The gold standard for the diagnosis of gastrointestinal tumors is electronic endoscopy, which uses electronic endoscopy to observe mucosal images, and conduct sampling, staining, and pathological diagnosis of abnormal areas. This method has disadvantages such as missed detection, diffusion, and time-consuming. [0004] How to perform real-time pathological diag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B15/14G02B13/00G02B23/24
CPCG02B13/0015G02B13/006G02B15/14G02B23/2407
Inventor 王立强石岩
Owner ZHEJIANG UNIV
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