Optical system for capsule endoscope

A capsule endoscope and optical system technology, applied in the field of optical systems, can solve the problems of large size, large distortion, and dark illumination of the imaging screen of the capsule endoscope, and achieve an increase in field of view, increase in imaging illumination, Distortion size good effect

Pending Publication Date: 2018-11-23
ZHONGSHAN ZHONGYING OPTICAL
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the advancement of science and technology, endoscopic technology has also developed rapidly. The emergence of capsule endoscope has optimized the experience of doctors and patients when examining body lesions, and it is very suitable for patients with serious conditions and the elderly. Friendly, due to its oral inspection characteristics, capsule endoscope is especially suitable for the inspection of digestive tract related diseases; however, capsule endoscope also has problems such as large size, dark illumination of imaging screen, and large distortion

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  • Optical system for capsule endoscope
  • Optical system for capsule endoscope
  • Optical system for capsule endoscope

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Embodiment Construction

[0043] The following combination Figure 1 to Figure 4 The specific embodiment of the present invention is further elaborated:

[0044] An optical system of a capsule endoscope, comprising a hemispherical cover PH, a first lens group G1 with a positive focal length, a diaphragm ST, a positive third lens L3 and a chip protection glass CG with a positive focal length; the hemispherical cover PH has a negative Optical power, wherein the side close to the object is convex in the paraxial region, and the side close to the image is concave in the paraxial region, both of which are spherical; the first lens group G1 consists of the first lens L1 with a negative focal length and a focal length of The positive second lens L2 constitutes; the optical system satisfies the following relational expression:

[0045] Rb

[0046] 1

[0047] 1

[0048] 0.89<|R31+R32| / |R31-R32|<1

[0049] Wherein, Ra is the radius of curvature of the hemispherical cover PH close to...

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Abstract

The invention relates to the field of optical systems, in particular to an optical system for a capsule endoscope. The optical system is composed of a hemispherical cover, a first lens group having apositive focal length, a diaphragm, a third lens having a positive focal length, and a piece of chip protection glass. The hemispherical cover has a negative focal power, a convex surface is formed atthe side approaching an object side at a paraxial area, and a concave surface is formed at the side approaching an image side at a paraxial area, wherein the two surfaces are spherical ones. The first lens group is formed by a first lens having a negative focal length and a second lens with a positive focal length. With the diaphragm, the field angle of the optical system is increased effectively; because the endoscope shape is similar to the capsule, the check-up person is able to take the instrument conveniently; the overall length of the optical system is reduced and the distortion is controlled on the premise that the shape need of the hemispherical cover is met; the field angle is large and the aperture is small and the imaging range of the single picture is wide when the system works, so that more body information is shot once.

Description

technical field [0001] The invention relates to the technical field of optical systems, in particular to an optical system of a capsule endoscope. Background technique [0002] With the advancement of science and technology, endoscopic technology has also developed rapidly. The emergence of capsule endoscopy has optimized the experience of doctors and patients when examining body lesions, and it is very suitable for patients with serious conditions and the elderly. Friendly, due to its oral inspection characteristics, capsule endoscope is especially suitable for the inspection of digestive tract-related diseases; however, capsule endoscope also has problems such as large size, dark illumination of imaging screen, and large distortion. Contents of the invention [0003] Based on this, it is necessary to address the above-mentioned technical problems and provide an optical system of a capsule endoscope that reduces the hemispherical cover and can increase the imaging illumin...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): G02B13/00G02B13/06G02B13/18G02B1/04A61B1/04
CPCA61B1/00163A61B1/041G02B13/0035G02B13/06G02B13/18G02B1/04
Inventor范俊辉朱佳巍牛明宇李璇黄立
OwnerZHONGSHAN ZHONGYING OPTICAL