Small-distortion stereo endoscope optical system

Abstract

The invention discloses a small-distortion stereo endoscope optical system, which comprises an endoscope objective lens, a steering system and an electronic imaging lens system, wherein the endoscope objective lens is provided with a direct vision endoscope objective lens assembly and an oblique vision endoscope objective lens assembly; one side, along a light propagation direction, of the direct vision endoscope objective lens assembly is provided with a sapphire protection film; one side of the sapphire protection film is provided with a first negative lens; one side of the first negative lens is provided with a second negative lens; one side of the second negative lens is provided with a parallel flat plate; one side of the parallel flat plate is provided with a plano-convex lens; and the oblique vision endoscope objective lens assembly is provided with a steering prism. The structure is simple; assembly is facilitated; the objective lens, the steering system and the electronic imaging lens system are used to correct various aberrations in a combination mode, a clear electronic image can be acquired, through optimizing an inverting system group number and an inverting system structure, the lens number of the optical system is the minimal, stray lights caused due to lens surface reflection can be reduced, and the image contrast ratio is improved.

Description

technical field [0001] The invention relates to an endoscope optical system, in particular to a small distortion three-dimensional endoscope optical system, which belongs to the technical field of hard tube endoscope optical system design. Background technique [0002] Minimally invasive surgery has become the development direction of various fields of surgical medicine in the world today. Minimally invasive surgery is more and more widely used due to its many advantages such as less damage to patients, less pain for patients during surgery, and shorter recovery time after surgery. The development of any minimally invasive surgery is inseparable from the hard tube endoscope. Rigid tube endoscope is welcomed by patients and surgeons for its advanced technology, convenient application, product diversification and specialization. At present, cystoscopy, hysteroscopy, laryngoscopy, sinusoscopy, laparoscopy, and arthroscopy have been widely used in county-level hospitals in my ...

AI Technical Summary

Problems solved by technology

[0003] The traditional minimally invasive surgery is performed by the doctor himself operating the surgical instruments and observing the two-dimensional electronic image of the rigid endoscope. The accuracy of the operation varies from person to person, and there are occasional misoperations during long-term operations.

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