Ultra-wide-angle lens system capable of being used for capsule endoscopy

A technology of ultra-wide-angle lens and capsule endoscope, applied in the field of ultra-wide-angle lens, can solve the problems of poor effect, poor imaging performance, large lens size, etc., and achieve the effect of good imaging quality, reasonable structure and low processing cost

Active Publication Date: 2019-06-14
PUTIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the lenses currently used in capsule endoscopy generally have a small field of view and poor imaging performance. The most important thing is that the size of the lens is relatively large, which makes the effect not very good in practical applications.

Method used

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  • Ultra-wide-angle lens system capable of being used for capsule endoscopy
  • Ultra-wide-angle lens system capable of being used for capsule endoscopy
  • Ultra-wide-angle lens system capable of being used for capsule endoscopy

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Embodiment Construction

[0020] The technical solutions in the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings in the embodiments of the present invention:

[0021] Such as figure 1 As shown, the present invention can be used in an ultra-wide-angle lens system for capsule endoscopy, and includes a first lens group 10, an aperture stop 20, and a second lens group 30 from the object side along the optical axis direction, and the first lens group 10 includes a The first lens 1 with focal power and the optical surfaces facing the object side and the image side are convex to the object side, and the first lens 1 with negative refractive power and the optical surface facing the object side is a plane and the optical surface facing the image side is convex to the object side Two lenses 2, a third lens 3 with positive refractive power and the optical surface facing the object side convex to the object side and the optical surface facing the...

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Abstract

The invention relates to an ultra-wide-angle lens system capable of being used for a capsule endoscopy. The ultra-wide-angle lens system comprises a first lens group, an aperture diaphragm and a second lens group from an object space in an optical axis direction; the first lens group comprises a first lens with the negative focal power, a second lens with the negative focal power, and a third lenswith the positive focal power; and the second lens group comprises a fourth lens with the positive focal power, a fifth lens with the negative focal power, a sixth lens with the negative focal power,a seventh lens with the positive focal power, and an eighth lens with zero focal power. The ultra-wide-angle lens system capable of being used for the capsule endoscopy has the characteristics of large view field angle, large aperture, miniaturization, good image surface uniformity, high imaging quality, compact structure and simple processing.

Description

Technical field: [0001] The invention relates to the technical field of ultra-wide-angle optical system imaging, in particular to an ultra-wide-angle lens that can be used for capsule endoscopy. Background technique: [0002] In recent years, more and more fields require not only high-resolution images, but also a large shooting range, especially when it is applied to the design of capsule endoscopy lenses, which can truly realize the "capsule" of digestive tract endoscopy , The light and small "capsule" allows the subject to check easily, and it is truly non-invasive and painless, especially for the elderly, young children or those with serious conditions. This has led to its almost explosive development in recent years, which has stimulated a huge demand for high-resolution, miniaturized, and ultra-wide-angle lenses. [0003] Since the lens has a large imaging field of view, it can achieve full spatial inclusion and full time domain real-time information acquisition, whic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B13/06G02B13/18G02B23/24
Inventor 曹一青沈志娟窦景欣
Owner PUTIAN UNIV
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