High pixel minitype optical auto focusing system driven by electromagnetic force

Abstract

The invention discloses a high-pixel mini-typed optical automatic focusing system driven to focus by electromagnetic force, comprising a base; the technical key point of the system is that the base comprises a drawtube used for guiding; the chamber of the drawtube is internally provided with a lens seat which can move upwards and downwards along the drawtube; the lens seat is enwound by a plurality of coil turns; the drawtube is internally provided with a magnet; the lens seat is provided with a recovery spring; the seat can also comprise a bearing seat and an upper cover; the drawtube is sleeved on the bearing seat; the upper cover presses the drawtube and is subsequently connected with the bearing seat; the magnet has four magnetic blocks which are uniformly arranged at four corners of the drawtube. The invention aims at overcoming the shortages that the existing focusing system has low precision, large appearance and restricted photographing distance and providing a system which adopts the electromagnetic force driving and spring elasticity balance type to realize the automatic focusing of the high-pixel lens; the system achieves the action accuracy of the automatic focusing of the lens and the micromation of the automatic focusing system and solves the microspur photographing problem of the lens.

Description

【Technical field】 [0001] The present invention relates to a focusing device used in imaging equipment, in particular to an automatic focusing system for high-pixel mobile phone lens, camera, video head and other similar products. 【Background technique】 [0002] The development trend of digital photography technology is that the digital lens is from low image quality to high image quality, from fixed focus digital lens to focusing digital lens. [0003] Currently, digital lenses for camera phones sold on the market are mainly lenses with 300,000 and 1.3 million pixels; relatively high-end camera phones are equipped with digital lenses with 2 million or even 3 million pixels. The shooting distance is limited, and when shooting close-up (5-30cm) or long-distance (beyond 200cm) scenes, the scene images will be blurred. Whether it is the overall clarity, brightness or contrast of the image plane, it is not very ideal; and some lenses with focusing function that have appeared on ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an automatic focus system that uses electromagnetic force drive and spring force balance to realize high-pixel lens in order to overcome the shortcomings of the above-mentioned focus system, such as low precision, large shape, and limited shooting distance.

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