High-resolution fine adjustment day and night prime lens

A fixed-focus lens and high-resolution technology, which is applied in the field of high-resolution fine-tuning day and night fixed-focus lenses, can solve the problems of uneven lens performance indicators, large image distortion, and unsatisfactory needs, and achieve compact structure and high resolution. High and compact structure design

Active Publication Date: 2014-12-03
FUJIAN FORECAM OPTICS CO LTD
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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

Method used

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Embodiment Construction

[0017] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below through specific embodiments and related drawings.

[0018] Such as Figure 1~2 As described above, 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 refractive power and positive optical power along the incident direction of light from left to right. The rear group B of the lens group, the variable diaphragm C is arranged between the front group A and the rear group B, and the front group A includes positive meniscus lenses A-1 (5) arranged in sequence from left to right and negative meniscus lens A-2 (6); the rear group B includes a cemented group of biconcave lens B-1 (8) and biconvex lens B-2 (9) arranged in sequence from left to right and biconvex lens B-3(10).

[0019] I...

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Abstract

The invention relates to a high-resolution fine adjustment day and night prime lens. A front lens set A with negative focal power and a rear lens set B with positive focal power are arranged in the optical system of the lens sequentially in the left-to-right light incidence direction. An iris diaphragm C is arranged between the front lens set A and the rear lens set B. The front lens set A comprises a positive meniscus lens A-1 and a negative meniscus lens A-2 sequentially from left to right. The rear lens set B comprises a double-concave lens B-1 and double-convex lens B-2 tightly-connected gluing assembly and a double-convex lens B-3 sequentially from left to right. The high-resolution fine adjustment day and night prime lens has the advantages of small distortion, large relative aperture and high resolution, can meet the requirement of three-million-pixel high-resolution video shooting, and achieves the wide spectrum confocal aim.

Description

technical field [0001] The invention relates to a high-resolution fine-tuning day and night dual-purpose fixed-focus lens, which belongs to the field of optical imaging 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 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. None of these can meet current needs. Contents of the invention [0003] In view of this, the object of the present invention is to provide a low-distortion, large-relative-aperture, wide-spectrum confocal high-resolution fine-tuning fixed-focus lens for day and night, wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B7/02G02B27/00
Inventor 苏青年屈立辉辛厉东曹榕声
Owner FUJIAN FORECAM OPTICS CO LTD
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