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Endoscope objective lens with optical amplifying function

An optical magnification and endoscope technology, applied in the field of endoscope objective lens, to achieve the effect of large field of view and high resolution

Active Publication Date: 2018-11-06
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The endoscopic objective lens with magnification function is the key component of the magnifying endoscope. It is very challenging in terms of optical design to ensure high definition while achieving a large field of view and optical zoom.

Method used

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  • Endoscope objective lens with optical amplifying function
  • Endoscope objective lens with optical amplifying function
  • Endoscope objective lens with optical amplifying function

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Embodiment Construction

[0019] Further illustrate the present invention below in conjunction with accompanying drawing.

[0020] figure 1 As shown, an endoscope objective lens with optical magnification function of the present invention includes three lens groups in total. There are a negative group 101, a focusing group 102 and a positive group 103 in the lens barrel 1 from the object side to the image side in sequence. The focusing group 102 can move along the optical axis under the pulling force of the pulling wire 13, and when the pulling force is released, under the action of the spring 9, the focusing group 102 returns to the original position, realizing conventional imaging-close zoom imaging-conventional imaging state regulation. The negative group 101 is composed of a first cemented lens 2, including a plane lens 21 and a first negative lens 22. Both surfaces of the plane lens 21 are planes, and the first negative lens 22 is a plane facing the object side, and a concave surface facing the i...

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Abstract

The invention discloses an endoscope objective lens with an optical amplifying function. The endoscope objective lens is formed by a negative group, a focusing group and a positive group from an object side to an image side. The focusing group can move along an optical axis under the pulling force of a traction steel wire, when tension is released, under the action of a spring, the focusing groupreturns to an original position, and thus the state adjustment of conventional imaging- close-range magnification imaging-conventional imaging can be achieved. The endoscope objective lens of the invention has the advantages of a compact structure, a small number of sheets and a short movement distance of optical amplification, the movement distance of the focusing group is only 0.2 mm, the strokeof an actuator is reduced, and both the conventional imaging and optical amplification imaging can satisfy endoscopic imaging with a large vision field and high definition.

Description

technical field [0001] The invention relates to an endoscope objective lens, in particular to an endoscope objective lens with optical magnification function. Background technique [0002] Magnifying endoscopy can magnify the gastric mucosa dozens of times or even hundreds of times, and can observe subtle changes in the structure of pits on the surface of gastric mucosal glands and the morphological characteristics of the mucosal microvascular network. It can be used to distinguish benign from malignant gastric mucosal lesions, so it has important clinical significance Value. However, when the optical magnifying endoscope realizes the magnified observation function, it will be accompanied by a significant decrease in the field of view. For example, the GIF-H290Z gastroscope of Olympus in Japan has a field of view of 140 degrees in conventional imaging, and the field of view is sacrificed to 95 degrees in magnified imaging. When zooming in on the EG-590ZW gastroscope from Fu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B23/24G02B15/177
CPCG02B15/177G02B23/2438
Inventor 王立强颜青来袁波赵文宇
Owner ZHEJIANG UNIV
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