High resolution day and night economical micro lens

Abstract

The invention relates to a high-resolution day and night dual-purpose economical miniature lens, which is sequentially provided with a front group A with a negative focal power, an iris diaphragm C and a rear group B with a positive focal power along the incident direction of light. The front group A is provided with a negative meniscus lens A-1, and the rear group B is provided with a positive meniscus lens B-1 and a cemented group composed of a biconvex lens B-2 and a biconcave lens B-3 in close contact. The lens adopts an anti-telephoto structure with positive and negative focal power separation, and has the advantages of low distortion, large relative aperture, high resolution, and wide-spectrum confocal; the lens can be made of high-refraction, low-dispersion optical glass materials, Various aberrations of the optical lens are perfectly corrected through computer optical aided design and optimization, so that the lens has high resolution and low distortion, and can meet the requirements of 2 million pixel high-definition video recording.

Description

technical field [0001] The invention relates to a camera lens device of a monitoring system, in particular to a high-resolution day and night dual-purpose economical miniature lens. Background technique [0002] With the development of science and technology and the surge of social demand for high-definition camera products, the camera lens market has been developing rapidly. After 20 to 30 years of evolution and development, there are currently a variety of miniature camera lenses of different specifications and models used in conjunction with cameras. However, the performance indicators of these lenses are mixed, and most of them are low-end products with low performance indicators. Not only are they suitable for a narrow spectral range, they can only be used under daytime light conditions of 480nm to 700nm, and the image distortion is relatively large, and the image distortion is different from the real scene. The picture difference becomes larger and the authenticity is...

AI Technical Summary

Problems solved by technology

However, the performance indicators of these lenses are mixed, and most of them are low-end products with low performance indicators. Not only are they suitable for a narrow spectral range, they can only be used under daytime light conditions of 480nm to 700nm, and the image distortion is relatively large, and the image distortion is different from the real scene. The picture difference becomes larger and the authenticity is poor. It is only suitable for ordinary cameras with 200,000 to 300,000 pixels, which cannot meet the current needs.

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