Endoscope objective group with viewing directional angle

Abstract

The invention discloses an endoscope objective group with a viewing directional angle, belonging to the technical field of medical endoscope in medial apparatuses, specifically relating to an endoscope objective group and a viewing direction angle prism. In the invention, one prism in the prior art is changed into a structure formed by gluing three prisms, the original expensive optical glass ZLaF1 is changed into common K9 glass; through adjusting the optical path length of the prism, a transition block is removed, an air gap of the original design is eliminated, and the excircle shape and optical parameters of an A object lens are modified, so that the viewing angle of the object lens is designed within 5 to 90 degrees according to actual demands. The endoscope objective group comprisesprotective glass, a first object lens, an a viewing angle prism, a b viewing angle prism, a c viewing angle prism and a second object lens; a plurality of optical parts are glued into an integral round rod. The invention is convenient to be installed, thereby improving the production efficiency, reducing the cost and the environmental pollution; the aperture of the prism is increased, the observedimage information is brighter so as to facilitate the diagnosis and improve the level of the operation.

Description

technical field [0001] The invention relates to an endoscope objective lens group with viewing angle, which belongs to the technical field of endoscope for medical equipment and traditional Chinese medicine, and specifically relates to an endoscope objective lens group and a viewing angle prism. Background technique [0002] With the rapid development of science and technology, medical equipment continues to improve, and medical endoscopes are widely used. There are many types of endoscopes. According to the viewing angle, they can be divided into forward-looking, squint-looking and side-looking. Known Chinese utility model patent 200520026393.x discloses "medical rigid endoscope with 120-degree viewing angle", which is characterized in that the objective lens in the lens is a wide-angle objective lens with 120 degrees. There is no report on the data about the endoscope glued objective lens group with viewing angle. [0003] In the prior art, the view angle part of the obje...

AI Technical Summary

Problems solved by technology

[0005] ①. Because there are many separation interfaces between air and glass, the reflection loss of light increases

[0006] ②. Due to the small size of the optical parts and high dimensional accuracy, it brings great difficulties to the processing and assembly of the optical parts and the matching mechanical parts.

[0007] ③, limited by the structure, the thickness of the front edge of the objective lens group is relatively thin, so when bonding with the outer tube, the bonding area is small and not firm, and it is impossible to use high-temperature disinfection with high efficiency and the most thorough disinfection or the number of times of high-temperature disinfection is low less life expectancy

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