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A kind of imaging lens for endoscope

An endoscope and lens technology, which is applied in the field of imaging lenses, can solve the problems of increasing the size of the lens, the length of the lens, and unfavorable miniaturization of the endoscope, and achieves the effects of reducing the number, high imaging quality, and shortening the length.

Active Publication Date: 2020-04-28
EZHOU INST OF IND TECH HUAZHONG UNIV OF SCI & TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, in order to ensure the imaging quality of the lens, it is easy to cause the length of the lens to be too large, which increases the volume of the lens, which is not conducive to the overall miniaturization of the endoscope

Method used

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  • A kind of imaging lens for endoscope
  • A kind of imaging lens for endoscope
  • A kind of imaging lens for endoscope

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Embodiment Construction

[0014] In order to make the object, technical solution and advantages of the present invention more clear, 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.

[0015] see figure 1 , the present invention provides an imaging lens 100 for an endoscope, comprising a first lens 11 and a second lens 12 arranged sequentially from the object side to the image side, and the first lens 11 and the second lens 12 have the same optical axis Arranged in order. When taking an image, the light passes through the first lens 11 and the second lens 12 in sequence, and then forms an image on the imaging surface 200 .

[0016] The first lens 11 has a first surface S1 on the opposite object side and a second surface S2 on the opposite image side, the first surface S1 is ...

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Abstract

The invention discloses an image capturing lens used for an endoscope. The lens comprises a first lens and a second lens. The first lens and the second lens are successively arranged from an object side to an image side. The image capturing lens meets the following conditional expression: 0.19 <= D11 / D <= 0.25, and 1.17 <= H1 / D12 <= 1.24, wherein D11 is the distance from the object side to the image side of the first lens along an optical axis; D12 is the distance from the image side of the first lens to the object side of the second lens along the optical axis; D is the distance from the object side of the first lens to the image side of the second lens along the optical axis; and H1 is an effective path of the image side face of the first lens. According to the invention, the first lensand the second lens are limited through the conditional expression, so it can be ensured that under the premise of quite high imaging quality, the number of the lenses is reduced and the length of theimage acquiring lens is reduced.

Description

technical field [0001] The invention relates to imaging technology, in particular to an imaging lens for an endoscope. Background technique [0002] The endoscope needs to enter the human body through an incision or a natural channel, so as to observe the pathological changes in the human body. Due to the extremely small incisions and human body passages, in order to ensure the normal progress of endoscopy, it is required that endoscopes continue to develop in a thinner and shorter direction. [0003] At present, in order to ensure the imaging quality of the lens, it is easy to cause the length of the lens to be too large, which increases the volume of the lens, which is not conducive to the overall miniaturization of the endoscope. Contents of the invention [0004] The object of the present invention is to overcome the above-mentioned technical deficiencies, and propose a small-sized imaging lens for endoscopes. [0005] In order to achieve the above-mentioned technica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B13/00G02B13/18A61B1/05
Inventor 冯宇马骁萧付玲
Owner EZHOU INST OF IND TECH HUAZHONG UNIV OF SCI & TECH