Aspheric optical system for laparoscope

• Main Authors: CHU YIBIN, LIN CONG, CHEN CHONG, LI XIANWEI, DANG MINGYANG, ZHANG LEI, GAO SUODAN, LI XUEMEI, WANG LIANG, WANG CHANGLI, LYU XIAOMENG
• Format: Patent
• Language: Chinese; English
• Published: 12.07.2022
• Subjects: DIAGNOSIS; HUMAN NECESSITIES; HYGIENE; IDENTIFICATION; MEDICAL OR VETERINARY SCIENCE; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS; SURGERY

An aspheric optical system for a laparoscope belongs to the technical field of medical instruments and is composed of an objective lens system, an image rotation system and an eyepiece system. Wherein the objective lens system is used for imaging through four aspherical lenses which are sequentially arranged at intervals, the image transfer system consisting of three groups of doublet lenses is used for transferring images, finally, the images are imaged to human eyes or a CCD (Charge Coupled Device) through the eyepiece system consisting of three lenses, and the maximum distortion of the whole optical system is only-2%, so that almost no difference between edge imaging and field-of-view center imaging is ensured; meanwhile, the optical imaging quality is excellent and is close to a diffraction limit value. The back of the objective lens I, the back of the objective lens II, the front of the objective lens III and the front of the objective lens IV are all even-order aspheric surfaces, a four-surface aspheric