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Continuous zoom large objective lens system for operating microscopes

A technology of surgical microscope and large objective lens, which is applied in the field of continuous zoom large objective lens system to achieve the effect of high system resolution and clear image

Active Publication Date: 2017-11-03
TIANJIN JINHANG INST OF TECH PHYSICS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention proposes a continuously zooming large objective lens system for operating microscopes to solve the technical problem of how to obtain continuously variable working distances

Method used

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  • Continuous zoom large objective lens system for operating microscopes
  • Continuous zoom large objective lens system for operating microscopes
  • Continuous zoom large objective lens system for operating microscopes

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Embodiment Construction

[0029] In order to make the purpose, content and advantages of the present invention clearer, the specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0030] This embodiment proposes a continuous zoom large objective lens system for surgical microscopes, its structure is as follows figure 1 shown. The continuous zoom large objective lens system is sequentially provided with a large objective lens system 10 , a zoom system 20 , an eyepiece objective lens system 30 and an eyepiece system 40 along the optical path.

[0031] The continuous zooming large objective lens system of the present embodiment, the technical performance that can realize is:

[0032] a) Focal length: 230mm ~ 400mm;

[0033] b) Working distance: 150mm~350mm;

[0034] c) Surgical surface observation range: Φ20mm~Φ125mm;

[0035] d) Diameter of diaphragm A: Φ6.4mm~Φ17mm;

[0036] e) Overall length...

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Abstract

The invention belongs to the technical field of optical system design, and specifically relates to a large objective lens system for operating microscopes, in particular to a continuous zoom large objective lens system. According to the continuous zoom large objective lens system for operating microscopes presented by the invention, a negative lens group is a fixed group, and mechanical compensation zoom is adopted. Continuous zoom and adjustable depth of field can be realized by moving a positive lens group along the optical axis. A zoom design in which the focal length ranges from 230mm to 400mm, the working distance ranges from 150mm to 350mm and the operating observation range is from Phi 20mm to phi 125mm is realized. Moreover, an apochromatism technology is used in optical design, and special optical glass with an abnormal dispersion coefficient is selected. The system resolution is high, and the image is clear.

Description

technical field [0001] The invention belongs to the technical field of optical system design, in particular to a large objective lens system for an operating microscope, in particular to a continuous zoom large objective lens system. Background technique [0002] The operating microscope enlarges the surgical field of view, enables doctors to see the fine structure of the surgical site, and can perform various microsurgeries that cannot be completed with the naked eye, expands the scope of surgical treatment, and improves the precision of surgery. It is widely used in ophthalmology, ENT Department of Dentistry, Dentistry, Neurosurgery, Hand Surgery, Gynecology and many other medical fields. There are two forms of surgical microscopes: large objective lens type and small objective lens type. High-performance surgical microscopes generally use large objective lens type, and large objective lenses are divided into two types: fixed focus type and zoom type. Adjustable, large ob...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B21/02G02B21/00
CPCG02B21/0004G02B21/025
Inventor 杨利华孟军合韩星徐大维穆郁董冰于双双
Owner TIANJIN JINHANG INST OF TECH PHYSICS
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