An optical lens assembly

Abstract

The invention relates to the field of optical devices, especially to an optical lens assembly for a high-definition 1 / 4-inch 300,000-pixel camera group in the field of electronic products for vehicle-mounted imaging systems, including a fixed diaphragm, a set of lenses, and a glass filter , the group of lenses includes the first lens, the second lens, the third lens, and the fourth lens arranged in sequence from the image side of the object direction on the same optical axis. The collocation of each lens of the optical lens assembly can effectively shorten the height of the lens, and at the same time By using two aspherical lenses to refract the light through the high-order curved surface, it can ensure that the light is precisely focused on one point, effectively eliminate various aberrations of the light, and ensure the high-quality imaging of the lens; by using a mixture of plastic lenses and glass lenses Matching can reduce the weight of the lens, effectively control the length of the lens, and reduce the manufacturing cost.

Description

technical field [0001] The invention relates to the field of optical devices, in particular to an optical lens assembly for a high-definition 1 / 4-inch 300,000-pixel camera group in the field of electronic products of a vehicle-mounted image system. Background technique [0002] Judging from the current development of the vehicle-mounted system market, the trend of high-definition and networking is prominent. 720P, 1080P or higher resolution surveillance products have become the mainstream of the surveillance market. The network is also gradually replacing the traditional analog, becoming the best carrier for high-definition. Although the in-vehicle monitoring system still plays the leading role in analog monitoring, since 2012, there have been some pioneering manufacturers in the market, and they have gradually piloted new high-definition solutions to solve the poor overall monitoring effect of the in-vehicle monitoring industry. At the Shenzhen Security Expo in 2012, many...

AI Technical Summary

Problems solved by technology

However, the technology in the 300,000-image camera module currently used in the field of electronic products for automotive visual systems, such as Chinese patent 201220301153, has the defects of poor imaging effect, small imaging field of view, and no scratch resistance and corrosion resistance on the surface. , can not be applied to the car rear view system; Chinese patent 201220686619 lens is heavy, the lens length is long, it is not easy to use and operate, and the field of view angle is limited, it is difficult to meet higher requirements

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