A portable video otoscope cmos camera focal length precise adjustment mechanism

Abstract

The invention relates to a portable video otoscope CMOS camera focal distance precise adjustment mechanism. The mechanism comprises a shell in the shape of a round tube, arc-shaped windows are formed in the middle of the shell, and rectangular notches are formed in interlayers of the shell. A rotation core sleeve is arranged in the shell, the front position and the rear position of the rotation core sleeve are fixed, threads are arranged on the inner side of the front end of the sleeve, the portion, located at the front end of a rotation core tube inside the shell, of the shell is provided with threads, the rotation core tube is rotated to be sleeved with the rotation core sleeve, and the front end of the rotation core tube is in an open shape with arc-shaped left and right faces and parallel upper and lower faces. A fixed CMOS component is arranged in the rotation core tube and moves on an optical axis frontwards and backwards, the purpose of mechanically adjusting the focal distance by a user is achieved, operation is convenient and time is saved. The thread pitch and the angle rotation range between the rotation core tube and the threads in the rotation core tube are set, so that the displacement distance of a CMOS photoreceptive device is precisely controlled, and the best graph imaging effect is guaranteed.

Description

technical field [0001] The invention relates to the field of CMOS cameras, in particular to a mechanism for precisely adjusting the focal length of a portable video otoscope CMOS camera. Background technique [0002] CMOS imaging devices have the advantages of low image noise, fast image signal output, low cost, low power consumption, high integration and small size, so they are widely used in the field of handheld camera equipment. [0003] Otoscope has become one of the basic tools for diagnosing ear and nose diseases. The video otoscope can carefully observe the inside of the ear and observe subtle lesions that cannot be detected by the naked eye. The principle is that the reflected light is imaged in the imaging system composed of a lens, a focusing mechanism, and an imaging sensor to display the lesion. At present, the focal length adjustment mechanism of the imaging system of most video otoscopes uses one or more focusing lens combinations to adjust the focus on the o...

AI Technical Summary

Problems solved by technology

At present, the focal length adjustment mechanism of the imaging system of most video otoscopes uses one or more focusing lens combinations to adjust the focus on the optical axis. The focusing process is cumbersome and the optical system design is complicated.

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