Counterflow focusing method and device implementing method

Abstract

The invention discloses a counterflow focusing method, comprising the following steps: 1) arranging a lens; 2) arranging an image sensor and a lens seat with a hollow cavity at the lower part are arranged in a focusing range of the lens; 3) arranging a focusing ring for adjusting the distance of the lens and the lens seat, respectively arranging internal threads matched with external threads of anupper screwing part and a lower screwing part on the upper part and the lower part of the focusing ring, rotating the focusing ring, and forcing the lens and the lens seat to close or separate towardthe center of the focusing ring simultaneously by the internal thread thereof, thus realizing the purpose of focusing by adjusting the distance of the lens and the image sensor. The method can focuswith fastness and high efficiency, and can adopt irrotational and symmetrical lens as the lens does not need to rotate; and the device has simple structure, adopts a counterflow focusing mode, has convenient and fast focusing and high focusing precision, improves product performance and is beneficial to the development of enterprises.

Description

technical field [0001] The invention relates to an adjustment device in a photographing device, in particular to a progressive focusing method and a device for implementing the method. Background technique [0002] CMOS Camera Module (CMOS Camera Module) is referred to as CCM, which is the core device for various new-generation portable camera equipment. Compared with traditional camera systems, it has the advantages of miniaturization, low power consumption, low cost, and high image quality. It can be widely used in camera phones, videophones, car assisted driving, security monitoring and other fields. The CCM is mainly composed of SENSOR, LENS, FPC / PCB, CONNECTOR and other parts. Focusing is the most important link in CCM production, and accurate and fast focusing is one of the key production technologies of CCM. The existing CCM focusing structure is to connect the lens and the lens holder with a thread, and the thread is screwed in or out by rotating the lens, and then...

AI Technical Summary

Problems solved by technology

This kind of focusing device has a simple structure, but because the lens needs to rotate, it is not suitable for non-rotationally symmetrical lenses. In addition, the focusing accuracy is easily affected by the minimum pitch of stable processing, so it cannot achieve high focusing accuracy; at the same time, when the focusing stroke When it is too long, the focusing speed of single thread is greatly limited

Therefore, conventional focusing devices cannot meet the needs of special CCMs

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