Optical zoom 4K adapter of medical endoscope

A technology of optical zoom and adapter, which is applied in the field of zoom objective optical system, can solve the problems such as the difficult realization of the adapter, and achieve the effect of simple structure and optimized aberration

Pending Publication Date: 2020-11-13
杭州有人光电技术有限公司
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  • Description
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With ultra-high-definition image quality, it is...

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  • Optical zoom 4K adapter of medical endoscope
  • Optical zoom 4K adapter of medical endoscope
  • Optical zoom 4K adapter of medical endoscope

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Embodiment Construction

[0015] The specific embodiment of the present invention will be further described in conjunction with the accompanying drawings.

[0016] from figure 1 The structure adopted in the present invention is: a medical endoscope optical zoom 4K adapter, including a lens body, and the arrangement order of the lenses along the optical axis from the front window protection glass 7 to the chip 6 is the first negative lens 1. The first positive lens 2, the first triplet lens 3, the second positive lens 4, and the second triplet lens 5, wherein the first triplet lens is a zoom group. Wherein said lens also comprises the aperture surface 8 placed between the first triplet lens and the second positive lens, and said lens comprises the aperture surface placed between the first triplet lens and the second positive lens; The display surface of the chip is perpendicular to the optical axis, and the center of the chip is on the optical axis. The focal length of the first positive lens is betwe...

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Abstract

The invention relates to an optical zoom 4K adapter of a medical endoscope. The optical zoom 4K adapter comprises a plurality of lenses arranged along an optical axis between front window protective glass and a chip. The plurality of lenses are arranged between the front window protective glass and the chip along the optical axis in sequence as follows: the first negative lens, the first positivelens, the first triplet lens, the second positive lens and the second triplet lens. The first triple lens is a zoom group, and the first triple lens moves back and forth to achieve the zoom effect. The optical zoom adapter of the medical endoscope has the zoom effect that the focal length ranges from 16 mm to 32 mm, the entrance pupil diameter is 4 mm, a 4K resolution 1/2.5 inch chip is used, anddistortion is smaller than 0.3%. The adapter is an imaging objective lens which is simple in structure, and cost-controlled and optimized. Based on an optical imaging principle, optical design software is used for repeatedly carrying out structure optimization design on an imaging objective lens to achieve aberration.

Description

technical field [0001] The invention belongs to a zoom objective optical system, in particular to an adapter applied to a medical endoscope, and the adapter is suitable for both a visible light source and an infrared light source. Background technique [0002] The endoscope adapter is a transfer system between the endoscope eyepiece and the imaging chip, which is mainly used in modern medical minimally invasive surgery. The ultra-high-definition endoscope adapter can present better medical images and provide higher medical diagnosis and treatment services. It is difficult to realize an adapter that has ultra-high-definition image quality and can realize zooming at the same time. [0003] At present, aspherical lenses are commonly used in objective optical systems with higher pixels, and the requirements for clarity and TV distortion are relatively easy to meet. The invention uses a glass aspherical lens to design an adapter to meet the higher definition and TV distortion r...

Claims

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Application Information

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IPC IPC(8): G02B15/177G02B13/04G02B13/18A61B1/00
CPCA61B1/00188G02B13/04G02B13/18G02B15/177
Inventor 周伟统
Owner 杭州有人光电技术有限公司
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