Medical endoscope optical parfocal lens

Abstract

The invention relates to a medical endoscope optical parfocal lens. According to the technical scheme, the medical endoscope optical parfocal lens is characterized in that the medical endoscope optical parfocal lens comprises a cam groove sleeve, a focusing lens group assembled in the cam groove sleeve, a fixed base rotationally assembled in the cam groove sleeve, a fixed lens assembled in the fixed base, a plurality of zoom lens assemblies assembled in the fixed base, a focusing driving assembly assembled on the cam groove sleeve and used for driving the focusing lens group to move along theoptical axis; and a zoom driving assembly assembled on the cam groove sleeve, used for driving the plurality of zoom lens assemblies to move along the optical axis, and synchronously rotating around the optical axis with the fixed lens in the fixed base. Therefore, the coaxiality, the inclination and the axial positioning precision between the zoom lens assembly and the fixed lens are improved, and the problems of image bounce and image blurring caused by position errors between the zoom lens assembly and the fixed lens assembly in the zoom process are effectively solved.

Description

technical field [0001] The invention relates to the technical field of optical lenses, in particular to a medical endoscope optical homogeneous zoom lens. Background technique [0002] With the development of medical technology, minimally invasive surgery is also booming. Through minimally invasive surgery, the medical purpose of traditional open surgery can be achieved at the cost of less medical trauma, and it can reduce the pain of patients and accelerate the recovery of patients. As the key equipment for minimally invasive surgery, the endoscopic camera system is the most critical equipment. Its purpose is to transmit the real-time images of the organs or internal tissues inside the patient's cavity to the monitor for real-time viewing by medical personnel. Therefore, the clarity and stability of the image is the key, which directly affects the doctor's judgment on the observed object, and the direct image clarity is the optical lens of the endoscope camera system. [0...

AI Technical Summary

Problems solved by technology

[0003] The traditional method of fixing the lens group is to directly install the front zoom lens group, the rear zoom lens group, and the fixed lens group into the drive cam groove sleeve respectively. will become larger, greatly increasing the size chain links, the axial and radial deviations will become larger, the coaxiality cannot be guaranteed, and due to the front and rear zoom

The result of this is often that the zoom effect is not good, and the imaging phase will change along the optical axis and radial direction. Once zoomed, the image will become blurred, and even the picture will jump during the zooming process, which needs to be refocused. It is inconvenient for personnel to observe human tissue or internal organs, and the jumping of the screen will also affect the operation of the operation process

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