3.6mm aspheric day and night dual-use high-definition fixed focus lens

Abstract

The invention relates to a 3.6 mm super economical plastic aspheric day-night dual-purpose high-definition fixed-focus lens, which comprises a main lens barrel, and an optical system disposed in the main lens barrel. The optical system includes a front group A, a diaphragm C and a rear group B. The front group A comprises a double-concave lens A-1 and a double-convex lens A-2, wherein the double-concave lens A-1 and the double-convex lens A-2 are sequentially arranged. The rear group B comprises a plastic aspheric lens B-1 and a plastic aspheric lens B-2, wherein the plastic aspheric lens B-1 and the plastic aspheric lens B-2 are sequentially arranged. According to the technical scheme of the invention, the contradiction between the low cost and the high quality of a camera can be solved. Therefore, a security camera is developed according to the trends of high quality and low cost, and the market competitiveness of the security camera is improved. The application range of the camera lens is enlarged. On the premise that the good imaging quality, the small temperature drift and the day-night confocal performance are ensured, the advantages of lower cost, smaller size, lighter weight and simpler structure are realized.

Description

technical field [0001] The invention relates to a 3.6mm aspherical high-definition fixed-focus lens for day and night. Background technique [0002] At present, there are a variety of 3.6mm and other short focal length wide-angle lenses used in security systems. In order to reduce the cost of the lens, everyone gradually reduces the use of the lens, so the quality and performance of the lens will inevitably be reduced, making the imaging result not good. As you wish. However, the use of more glass lenses to improve the quality of the lens has greatly increased the cost of the product, resulting in increased difficulty in product promotion and a decline in market competitiveness. In short, in the current security industry, there are few real low-cost, high-quality, low-temperature drift fixed-focus lenses. Contents of the invention [0003] In view of the deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a 3.6mm asphe...

AI Technical Summary

Problems solved by technology

However, using more glass lenses to improve the quality of the lens will greatly increase the cost of the product, resulting in increased difficulty in product promotion and a decline in market competitiveness

In short, in the current security industry, there are few low-cost, high-quality, low-temperature drift fixed-focus lenses in the true sense.

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