Optical system of camera adapter for endoscope

Abstract

The invention relates to an optical system of a camera adapter for an endoscope. The optical system comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens, wherein the principal optic axes of the six lenses are positioned on the same straight line; the first lens and the sixth lens are window plates and are respectively arranged at the two ends of the optical system; the second lens and the fifth lens are meniscus lenses and are arranged between the first lens and the sixth lens, and the concave surfaces of the second lens and the fifth lens are respectively arranged towards the first lens and the sixth lens; the third lens and the fourth lens are double-gluing lenses and are arranged between the second lens and the fifth lens; each double-gluing lens is formed by gluing a biconvex lens and a biconcave lens; the biconvex lenses of the third lens and the fourth lens are respectively arranged towards the second lens and the fifth lens; the biconcave lenses of the third lens and the fourth lens are arranged in an opposite way. After the optical system is adopted, the resolution ratio of the camera adapter for the endoscope is remarkably improved; the optical system is suitable for a high-definition camera with the pixel of more than two million.

Description

technical field [0001] The invention relates to an endoscope camera adapter, in particular to an endoscope camera adapter optical system that can be used with a high-definition camera (CCD / CMOS) with more than two million pixels. Background technique [0002] At present, endoscopes have been widely used in medical operations. With the help of slender endoscopes, operators can observe the details of lesions in the body cavity of the human body to complete the operation. [0003] Rigid endoscopes are generally composed of three parts: one is a slender endoscope equipped with an objective optical system inside, which is inserted into the human body to detect lesions; The image detected by the speculum is transmitted to the back-end camera; the third is the camera, which acquires the captured image, converts the optical signal into an electrical signal, and transmits it to the display for easy observation. [0004] In recent years, with the significant improvement of camera res...

AI Technical Summary

Problems solved by technology

Since the double wall of the adapter lens barrel is provided with slotted holes, problems such as loosening and poor sealing are likely to occur due to wear and tear during long-term use, thereby affecting the normal surgical instrument disinfection procedure of the endoscope adapter

In addition, the structural size of this adapter increases, which increases the cost of instrument production and processing

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