High-resolution fine-tuned day and night fixed focus lens

Abstract

The invention relates to a high-resolution fine-tuning day and night dual-purpose fixed-focus lens. The optical system of the lens is sequentially provided with the front group A of the lens group with negative focal power and positive focal power along the incident direction of light from left to right. The rear group B of the lens group, a variable diaphragm C is arranged between the front group A and the rear group B, and the front group A includes positive meniscus lens A-1 and negative meniscus lens A-1 arranged in sequence from left to right Moon-shaped lens A-2; the rear group B includes a cemented group of double-convex lens B-1 and double-convex lens B-2 arranged in sequence from left to right, and double-convex lens B-3. The high-resolution fine-tuning day and night dual-purpose fixed-focus lens has the advantages of low distortion, large relative aperture, and high resolution, and can meet the requirements of 3 million pixel high-definition video recording to achieve wide-spectrum confocal.

Description

Technical field [0001] The invention relates to a high-resolution fine-tuning day and night fixed-focus lens, which belongs to the field of optical camera devices of video technology. Background technique [0002] After 20 to 30 years of evolution and development of small TV surveillance cameras, there are currently a variety of specifications and models of miniature camera lenses used in conjunction with them, but the performance indicators of these lenses vary. Most of them are low-end products with low performance indicators and only suitable Ordinary cameras with 200 to 300,000 pixels can adapt to a narrow spectral range and can only be used under daylight conditions from 480nm to 700nm. The image distortion is large, the image distortion and the real scene are worse, and the authenticity is poor. None of these can meet current needs. Summary of the invention [0003] In view of this, the purpose of the present invention is to provide a high-resolution fine-tuning day and nig...

AI Technical Summary

Problems solved by technology

[0002] After 20 to 30 years of evolution and development of small TV surveillance cameras, there are currently a variety of miniature camera lenses of various specifications and models used in conjunction with them. However, the performance indicators of these lenses vary, and most of them are low-end products with low performance indicators. Ordinary cameras with 200,000 to 300,000 pixels have a narrow spectral range and can only be used under daytime light conditions of 480nm to 700nm. The image distortion is large, and the difference between the image distortion and the real scene becomes larger, and the authenticity is poor.

None of these can meet current needs

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