ENDOSCOPE SYSTEM AND INTEGRATED DESIGN METHOD FOR ENDOSCOPE CAMERA OPTICAL SYSTEM - BEIJING FANXING GUANGDIAN MEDICAL TREAT EQUIPMENT CO LTD

Title:

ENDOSCOPE SYSTEM AND INTEGRATED DESIGN METHOD FOR ENDOSCOPE CAMERA OPTICAL SYSTEM

Document Type and Number:

WIPO Patent Application WO/2019/127245

Kind Code:

A1

Abstract:

The present invention relates to an endoscope system and an integrated design method for an endoscope camera optical system. The endoscope system comprises an object lens module, relay module, eye lens module, optical interface light path module and digital ultra-high definition camera successively arranged along the light path direction, wherein an image formed by the object lens module is projected to the optical interface light path module in a non-parallel light manner/divergent light manner after passing through the relay module and the eye lens module. According to the present invention, integrated ultra-high resolution of the optical endoscope and endoscope camera system is achieved by means of improving the resolution of the system. The resolution is limited by an image square aperture angle which may be obtained by the formula: 2tanu'＝D/f', and the relative aperture and entrance pupil diameter of the system must be increased, wherein the relative aperture of the system comprises the relative aperture of the object lens module, the relative aperture of an eye lens, and the relative aperture of an optical interface; the relative apertures mentioned by the present application are all relative apertures of the system, and meanwhile, the entrance pupil diameter and the exit pupil diameter are required to simultaneously increase. For example, the entrance pupil diameter of an existing laparoscopic product is generally 0.2mm to 0.4mm, the exit pupil diameter is 1mm to 2mm, and the relative aperture is 1: 10; in the present solution, the system is taken into consideration as a whole, such that the entrance pupil diameter is 0.6mm, the exit pupil diameter is 3mm to 6mm, and the relative aperture is 1: 4 to 1: 6; and the resolution of the modulation transfer function (MTF)>0.2@120lp/mm (or in other words, a resolution of 120 line pairs per millimeter) in a full view field range of different products at a field-of-view angle of 50 degrees to 120 degrees may be achieved.

Inventors:

DONG GUOQING (CN)
XIANG YANG (CN)
LI QI (CN)
GAO FENG (CN)
NING XU (CN)

Application Number:

PCT/CN2017/119501

Publication Date:

July 04, 2019

Filing Date:

December 28, 2017

Export Citation:

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Assignee:

BEIJING FANXING GUANGDIAN MEDICAL TREAT EQUIPMENT CO LTD (CN)

International Classes:

G02B23/24

Foreign References:

CN107102433A	2017-08-29
CN101109827A	2008-01-23
CN101681013A	2010-03-24
CN105511085A	2016-04-20

Other References: