Ultra-thin wide-angle lens

Abstract

The embodiment of the present invention discloses an ultra-thin wide-angle lens, which includes a first lens, a second lens, a third lens, a fourth lens, a filter, and an image surface arranged sequentially along the optical axis direction from the object side to the image side. The refractive power of one lens is negative and the surface facing the image side is concave, the refractive power of the second lens is positive and the convex surface faces the object side, the refractive power of the third lens is positive and is a biconvex lens, and the fourth lens The optical power of the lens is negative and the surface facing the image side is plano-concave. The present invention composes an ultra-thin wide-angle lens by using lenses with a specific structural shape with reasonable focal power distribution, which can achieve high resolution under a compact structure; since the number of lenses is only 4, the structure is simple; all optical lenses in the present invention use aspheric surfaces Plastic lenses, the cost of plastic materials is low, the price of finished lenses is also low, and the cycle is short, which can be widely used in the field of vehicle lenses.

Description

technical field [0001] The invention relates to the technical field of optical lens modules, in particular to an ultra-thin wide-angle lens. Background technique [0002] In the field of automobile assisted driving, the driving recorder is a common device, and the lens is the main component of the driving recorder. The performance of the lens directly affects the imaging quality and imaging field of view. At present, the driving recorder mainly uses a chip of one third of an inch or less. The pixels are generally less than 5 million, the length of the lens is generally more than 15mm, and the structure is complex. With the continuous improvement of the technical index requirements of the recorder, the requirements for the miniaturization and light weight of the lens have been put forward. [0003] For example, the lens disclosed in the utility model patent with the application number 201821543347.0 and the invention titled "A 2K Large Aperture 500W Driving Recorder Lens" has...

AI Technical Summary

Problems solved by technology

[0002] In the field of automobile assisted driving, the driving recorder is a common device, and the lens is the main component of the driving recorder. The performance of the lens directly affects the imaging quality and imaging field of view. At present, the driving recorder mainly uses a chip of one third of an inch or less. The pixels are generally less than 5 million, the length of the lens is generally more than 15mm, and the structure is complex. With the continuous improvement of the technical index requirements of the recorder, the requirements for the miniaturization and light weight of the lens have been put forward

[0003] For example, the lens disclosed in the utility model patent with the application number 201821543347.0 and the invention title "A 2K Large Aperture 500W Driving Recorder Lens" has the following disadvantages: the overall length is too long, reaching more than 17mm, which cannot meet the miniaturization requirements; the structure is complex , only 6 pieces of glass lenses are used, and the weight is heavy, which cannot meet the lightweight requirements

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