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A wide-angle zoom lens for endoscopy

A zoom lens and endoscope technology, which is applied in the field of wide-angle zoom lenses, can solve the problems that the length and outer diameter of the wide-angle zoom lens cannot meet the size requirements, the imaging clarity of the wide-angle zoom lens cannot meet the surgical requirements, and cannot meet the requirements of thinning and lightening. , to achieve the effect of small size, large field of view, and high imaging resolution

Active Publication Date: 2020-05-01
EZHOU INST OF IND TECH HUAZHONG UNIV OF SCI & TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing wide-angle zoom lenses either cannot meet the requirements of thinning, that is, the length and outer diameter of the wide-angle zoom lens cannot meet the size requirements, and the imaging definition of the wide-angle zoom lens that meets the size requirements cannot meet the surgical requirements.

Method used

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  • A wide-angle zoom lens for endoscopy
  • A wide-angle zoom lens for endoscopy
  • A wide-angle zoom lens for endoscopy

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Embodiment Construction

[0012] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0013] see figure 1 , the present invention provides a wide-angle zoom lens 100 for an endoscope, which includes a first lens 11, a second lens 12, a third lens 13 and a first lens arranged in sequence from the object side to the image side along its optical axis direction. Four lenses 14, the first lens 11, the third lens 13 and the fourth lens 14 all have positive diopter, and the second lens 12 has negative diopter.

[0014] Wherein, the first lens 11 has a first surface S1 opposite to the object side and a second surface S2 opposite to the image side, the first surface S1 is convex toward the ...

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Abstract

The invention discloses a wide-angle zoom lens for an endoscope. The wide-angle zoom lens comprises a first lens, a second lens, a third lens and a fourth lens. The wide-angle zoom lens meets the following conditional expressions: R1>0, R2= infinity, R3<0, R4> 0, R5>0, R6< 0, R7>0 and R8<0, wherein R1 is curvature radius of the object side surface of the first lens, R2 is curvature radius of the image side surface of the first lens, R3 is curvature radius of the object side surface of the second lens, R4 is curvature radius of the image side surface of the second lens, R5 is curvature radius of the object side surface of the third lens, R6 is curvature radius of the image side surface of the third lens, R7 is curvature radius of the object side surface of the fourth lens, and R8 is curvature radius of the image side surface of the fourth lens. Through limit of the conditional expressions above, the wide-angle zoom lens is allowed to have the advantages of small size and high imaging definition and the like, thereby maximizing the visual field of the wide-angle zoom lens under the condition of ensuring imaging quality.

Description

technical field [0001] The invention relates to imaging technology, in particular to a wide-angle zoom lens for an endoscope. Background technique [0002] Endoscopes are mainly used to observe lesions in the human body and provide a field of view for in vivo surgery. When providing a field of view for in vivo surgery, the larger the field of view it provides, the more convenient it is for medical personnel to operate. However, the existing wide-angle zoom lenses cannot meet the requirements of thinning and lightening, that is, the length and outer diameter of the wide-angle zoom lenses cannot meet the size requirements, and the imaging clarity of the wide-angle zoom lenses that meet the size requirements cannot meet the surgical requirements. Contents of the invention [0003] The object of the present invention is to overcome above-mentioned technical deficiency, propose a kind of small size, high-definition wide-angle zoom lens problem that is used for endoscope. [00...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B15/173A61B1/00
CPCA61B1/00096A61B1/0019G02B15/173
Inventor 冯宇马骁萧付玲
Owner EZHOU INST OF IND TECH HUAZHONG UNIV OF SCI & TECH
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