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A kind of endoscopic imaging lens

An imaging lens and endoscope technology, applied in the field of imaging, can solve the problems of inability to meet the requirements of imaging clarity and low imaging quality, and achieve the effect of improving the probability of successful operation and high imaging quality

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

At present, the imaging quality of existing low-length and small-diameter endoscopic lenses is low, which cannot meet the requirements for imaging clarity during surgery

Method used

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  • A kind of endoscopic imaging lens
  • A kind of endoscopic imaging lens
  • A kind of endoscopic imaging lens

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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 an endoscopic imaging lens 100, comprising a first lens 11 with a positive refractive power, a second lens 12 with a negative refractive power, and a A third lens 13 with positive power, a fourth lens 14 with positive power, and a fifth lens 15 with negative power.

[0014] The first lens 11 has a first surface S1 on the side opposite to the object and a second surface S2 on the side opposite to the image, and both the first surface S1 and the second surface S2 are convex aspheric surfaces; the second lens 12 has a side opposite to the object. ...

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Abstract

The invention discloses an endoscope imaging lens. The endoscope imaging lens comprises a first lens having positive focal power, a second lens having negative focal power, a third lens having positive focal power, a four lens having positive focal power and a fifth lens having negative focal power which are sequentially arranged along the optical axis from an object side to an image side, and theimaging lens satisfies conditions as follows, TTL / L5>1.15; R5 / F3>R1 / F1>0; R6 / F3<R2 / F1<0; |R3 / F2|<R7 / F4|; |R4 / F2|<R8 / F4|. The endoscope imaging lens is advantaged in that the endoscope imaging lens islimited through the conditions, the endoscope imaging lens having small length and small diameter is made to have relatively high imaging quality, and improvement of the operation success rate of a chamber is facilitated.

Description

technical field [0001] The invention relates to imaging technology, in particular to an endoscope imaging lens. Background technique [0002] Endoscopes are mainly used to observe lesions in the human body and provide vision for internal operations. With the miniaturization of medical wounds, the requirements for the miniaturization of endoscopic lenses are becoming increasingly stringent, which requires low-length, small-diameter imaging lens, thereby minimizing the volume of the endoscopic lens. At present, the imaging quality of existing low-length and small-diameter endoscopic lenses is low, which cannot meet the requirements for imaging clarity during surgery. Contents of the invention [0003] The object of the present invention is to overcome the above-mentioned technical deficiencies, and propose an endoscopic imaging lens with low length, small diameter and high imaging quality. [0004] In order to achieve the above-mentioned technical purpose, the technical so...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B13/00G02B13/18G02B23/24
Inventor 冯宇马骁萧付玲
Owner EZHOU INST OF IND TECH HUAZHONG UNIV OF SCI & TECH