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Ultra-wide-angle steering endoscope lens

An ultra-wide-angle lens technology, applied in the field of optical lenses, can solve the problems of sacrificing external dimensions and increasing costs, and achieve the effects of sufficient light input, large field of view, and cancellation of coating and gluing processes

Pending Publication Date: 2020-12-25
ZHONGSHAN ZHONGYING OPTICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to ensure the imaging quality of the current hard endoscopic lenses, most of them are designed by mixing plastic and glass, which will sacrifice their external dimensions and increase the cost; at present, few manufacturers can meet the requirements of endoscopic imaging while taking into account Its profile and cost; The present invention is made based on this situation

Method used

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  • Ultra-wide-angle steering endoscope lens
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  • Ultra-wide-angle steering endoscope lens

Examples

Experimental program
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Effect test

Embodiment 1

[0050] As a specific embodiment of the present invention, the parameters of the ultra-wide-angle steering endoscopic lens are shown in Table 1 below:

[0051] Table 1 Structural parameter table of an ultra-wide-angle steering endoscopic lens

[0052]

[0053]

[0054] Table 2 The ratio sag / r of the sag height sag to the radius r of each lens surface of an ultra-wide-angle steering endoscopic lens

[0055]

[0056] In this embodiment, the object distance is 20mm, and the object distance is relatively short. Distortion manifests itself as image 3 As shown, the maximum distortion is less than 37%. It can be seen from its trend that its TV distortion is very small, and the field curvature is as Figure 4 As shown, the maximum field curvature is less than ±0.01 mm, and the optical system of this example has a good imaging effect.

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Abstract

The invention discloses an ultra-wide-angle steering endoscope lens, and belongs to the field of optical lenses. The ultra-wide-angle steering endoscope lens comprises a first lens element (P1), a prism 1 (P2), a prism 2 (P3), a diaphragm (STO), a second lens element (P4), a third lens element (P5), a fourth lens element (P6) and a fifth lens element (P7) which are sequentially arranged along thelight propagation direction, wherein the first lens element (P1) is a positive lens, the prism 1 (P2) and the prism 2 (P3) are deflecting prisms which form an inclination angle of 30 degrees with thehorizontal direction, the two prisms do not need to be glued, the second lens element (P4) is a negative lens, the third lens element (P5) is a positive lens, the fourth lens element (P6) is a negative lens, the fifth lens element (P7) is a positive lens, and each lens and each prism are plastic lenses, and have the characteristics of large field angle, light weight, small size and the like. The invention provides the small steering endoscope lens with a size of 2 mm x 2 mm x 6 mm, and the high-image quality and low-aberration imaging and the low-cost production can be realized.

Description

technical field [0001] The invention belongs to the technical field of optical lenses, and more specifically relates to an ultra-wide-angle steering endoscopic lens. Background technique [0002] With the improvement of medical level and the application of minimally invasive surgery, rigid endoscope plays an extremely important role as the eye of minimally invasive surgery, and its imaging quality, visual range, and small size are particularly important. In order to ensure the imaging quality of the current hard endoscopic lenses, most of them are designed by mixing plastic and glass, which will sacrifice their external dimensions and increase the cost; at present, few manufacturers can meet the requirements of endoscopic imaging while taking into account Its appearance and cost; The present invention is made based on this situation exactly. Contents of the invention [0003] Aiming at the deficiencies of the existing technology and the actual needs, the present invention...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B1/00G02B1/04G02B13/00G02B13/06G02B13/18
CPCA61B1/00096A61B1/00163G02B1/041G02B13/0045G02B13/0065G02B13/06G02B13/18
Inventor 李璇朱佳巍王旗钟有杰
Owner ZHONGSHAN ZHONGYING OPTICAL
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