Stereoscopic endoscope electronic imaging optical system

Abstract

The invention discloses a stereoscopic endoscope electronic imaging optical system. Hopkins rod lenses, more than one of image transferring doublet lenses, rhombic prisms, imaging doublet lenses, single lenses and protective windows are sequentially arranged behind an objective lens and a 1:1 image transferring system composed of three groups of rod lenses which are in structural symmetry along a light ray transmitting direction; the stereoscopic endoscope electronic imaging optical system directly magnifies an image of the image transferring system to a CCD or CMOS pixel surface, and the axial magnification ranges from 1.1 to 2; the Hopkins rod lenses are used for increasing the working length of the system, and effectively reduce the number of lenses; the rhombic prisms are used for increasing the distance between the optical axes of lens groups behind two optical channels of a stereoscopic endoscope, and satisfy spatial layout requirements of two CCD or CMOS devices; and the imaging doublet lenses and the single lenses are used for magnifying images, and participate in system distortion correction so as to reduce the distortion of the system.

Description

technical field [0001] The invention belongs to the technical field of optical design, and in particular relates to the design of an electronic imaging optical system of a three-dimensional endoscope with small distortion and large field of view. Background technique [0002] Minimally invasive surgery has become the development direction of various fields of surgical medicine in the world today. Minimally invasive surgery has many advantages, such as less damage to patients, less pain for patients during surgery, and shorter recovery time after surgery, and it is more and more widely used. The development of any minimally invasive surgery is inseparable from the hard tube endoscope. Rigid tube endoscopes are welcomed by patients and surgeons due to their advanced technology, convenient application, product diversification and specialization. At present, various rigid tube endoscopes such as cystoscope, hysteroscope, laryngoscope, sinus mirror, laparoscope and arthroscope ...

AI Technical Summary

Problems solved by technology

This structure cannot correct any aberration, and the radius of the spherical surface is large. It is very difficult to process whether the glass is drilled with a plate or the edging and centering process is adopted. Almost no enterprises adopt this structure.

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