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高清监控镜头四大技术及发展趋势
作者:admin  10bet体育官方网站:2017-05-17 10:11:11
一、监控镜头开展现状
First, monitoring cameras to carry out the status quo
近些年,跟着安防技能移风易俗,高清技能开端广泛运用,高清摄像机也逐步替代标清摄像机,变成商场干流。高清摄像机能为用户供给非常好的画质,更多的细节信息,减少了“俄罗斯方块构成的印象油画”笑剧。摄像机的高清作用,不仅仅是依托更高像素的感光器材、非常好的ISP技能、更高效的存储技能,高清镜头也是关键技能,没有匹配的高清镜头,高清摄像机也不能发挥出应有的高清作用。
In recent years, with the widely used security skills, skills HD start, high-definition cameras also gradually replace SD camcorders, into the mainstream market. HD camera users can supply good quality, more details, reduce the "Tetris of impression painting" farce. HD camera function, not just relying on the photographic equipment, higher pixel very good ISP skills, efficient memory skills, high-definition camera is a key skill, no HD, HD video camera lens, can play a role in hd.
高清镜头,也称超百万像素镜头,与通常镜头比较具有清晰度高、光谱透射能力强、做工更精细等优势。通常选择镜头成像圈基地及0.7视场的解像力作为评判镜头清晰度的标准,成像圈基地和0.7视场都能到达1000TVLine以上,才称之为高清镜头。
HD lens, also known as ultra mega pixel lens, and compared with the usual lens, with high definition, spectral transmission ability, fine workmanship and other advantages. Usually choose ring base and 0.7 field lens imaging resolution as the evaluation standard of imaging lens clarity, ring base and 0.7 field can reach more than 1000TVLine, is called a high-definition camera.
2010年起,高清镜头坚持均匀每年10%以上增长速度,现在国内CCTV高清镜头商场首要品牌有海康威视、凤凰光学、福建福光、厦门力鼎等国商品牌,以及富士能、腾龙、computar、宾得等日系品牌。因为国内光学技能迅速前进和安防镜头的国产化趋势,以海康威视为代表的国商品牌逐步替代日系品牌,开端占有更多的商场份额。凭仗对商场需要的精准把握和对功用、质量的不懈追求,现在海康威视的高清镜头商品现已涵盖了1/2.7”高清红外变焦,1/1.8”高清红外变焦和ITS高清等多个大的系列。
Since 2010, every year more than 10% high-definition camera adhere to the uniform growth rate, now the domestic market mainly CCTV high-definition camera brands Hikvision, phoenix optics, Fujian Fu light, Xiamen Li Ding's brands, and Fuji, dragon, Computar, Pentax and other Japanese brands. Because of the rapid progress of domestic optical skills and the localization of security cameras, the Hikvision brand gradually replaced the Japanese brand, and began to occupy more market share. Relying on the accurate grasp of market need and function, the quality of unremitting pursuit, now Hikvision's high-definition camera goods now covers 1/2.7 HD infrared zoom, 1/1.8 HD infrared zoom and ITS HD and other large series.
 二、四大核心技能
Two, four core skills
镜头自身是高精细光学器材,高清镜头特别如此。高清镜头之所以具有较佳的高清功用,离不开其选用的关键技能:
The lens itself is a high precision optical device, especially high-definition lenses. High-definition lens has better high-definition function, cannot leave the key skill that it chooses:
1.超精细模造非球面技能
1. ultra fine modeling aspheric skills
传统的球面技能开展到今天,其规划技能和制作工艺都已适当老练,在光学职业的几乎一切范畴都有广泛的运用。然而在规划复杂高清镜头时,球面技能的成像作用无法到达最好。非球面技能能够校对球面像差,大幅度进步镜头的成像质量。非球面镜片形状是经过准确计算并由精细机器模造而成,一片非球面镜片就能完成多个球面镜片校对像差的作用。选用超精细模造非球面镜片的镜头能够有用地减小镜头体积的一起,使得镜头的成像更清晰,透光度非常好,颜色复原愈加准确。
With the development of the traditional spherical skills, the planning skills and manufacturing techniques have been well developed, and have been widely used in almost all fields of the optical profession. However, when planning complex high-definition lenses, the imaging capabilities of spherical skills are not the best. Aspheric techniques are capable of correcting spherical aberration and substantially improving lens quality. The shape of aspherical lenses is accurately calculated and made of a fine machine model, and an aspherical lens can accomplish the effect of correcting the aberration of a plurality of spherical lenses. The use of ultra fine lenses to produce aspherical lenses can effectively reduce the volume of the lens, making the lens clearer, better transmittance, and more accurate color recovery.
2.多层宽带增透镀膜技能
2. multilayer broadband antireflection coating technology
多层宽带增透镀膜技能,能最大程度地进步镜头的光线透过率,降低光线在每个光学镜片表面的剩余反射。该技能能够将玻璃和空气界面的可见光反射率按捺到0.5%以内,一起快到红外光的反射率降至约1%,如图3所示。经过高质量的镀膜,减少了图画上不必要的杂散光和鬼像,有用进步画面的通透性,亦确保了牢靠的高清作用。
Multilayer broadband antireflection coating technology can maximize the light transmittance of the lens and reduce the residual reflection of light on the surface of each optical lens. This skill can be glass and air interface visible light reflectivity control to less than 0.5%, with fast infrared reflectivity dropped to about 1%, as shown in figure 3. The high quality coating reduces the unnecessary astigmatism and ghost image on the picture, improves the permeability of the picture and ensures the high definition function of the picture.
3.超低色散资料技能
3. ultra low dispersion data skills
通常监控镜头,在规划上也会思考校对不一样波长光线(红、绿、蓝)的像差,但通常是将两端的红、蓝两种色光的聚集同一方位上,但和中心的绿光焦点依然不重合,即存在二级光谱的像差,约束镜头成像质量进一步提高。为了校对二级光谱,如海康威视监控高清系列镜头,广泛运用了超低色散的光学玻璃资料,运用其不一样于常规光学玻璃的色散特性,能够将红、绿、蓝等色光聚集到同一个平面上,如图4所示,镜头高清功用更优。
Usually the surveillance camera, in the planning will think of different wavelengths of light proof (red, green and blue) of aberration, but usually the two red and blue two colors together on the same direction, but the focus is still green and center do not coincide, i.e. there are two secondary spectrum aberrations, lens constraint to further improve the quality of imaging. In order to check two spectra, such as Hikvision monitor HD series lenses are widely used in optical glass materials with ultra low dispersion, using the different from the conventional optical glass dispersion, can be red, green and blue light gathered in the same plane, as shown in Figure 4, the camera function more HD excellent.
4.精细变焦凸轮规划技能
4. fine zoom cam planning skills
关于高清变焦镜头而言,其成像质量在很大程度上取决于变焦凸轮的精度。经过凸轮的旋转,股动变焦和聚集组镜片前后移动,然后完成焦距的连续改变和聚集点的调理。假如凸轮的精度欠安,则在变焦和聚集的过程中,不可避免的会呈现透镜光轴的偏移或许倾斜,致使成像质量的严重降低。海康威视高清系列监控镜头,选用精细变焦凸轮规划技能,能确保杰出的凸轮制作精度,确保变焦和聚集过程中的成像质量,一起也确保了顺滑而不失阻尼感的调理手感。
As far as high-definition zoom lens is concerned, its imaging quality depends greatly on the accuracy of the zoom cam. After the rotation of the cam, the moving zoom and the clustered lens move back and forth, then complete the continuous change of the focal length and the adjustment of the gathering point. If the poor precision of cam, the process is gathered in the zoom and the offset, inevitably will show the optical axis of the lens may tilt, resulting in severely reduced image quality. Hikvision HD series monitoring camera, the precise zoom cam planning skills, can ensure outstanding cam fabrication precision to ensure the imaging quality of the zoom and aggregation process, together also ensures smooth and without losing the sense of touch damping conditioning.
 
 三、开展趋势
Three, to carry out the trend
近来两年,跟着高清摄像机在安防监控范畴的运用不断扩大,股动高清监控镜头技能也紧跟着摄像机的脚步,不断晋级,呈现了4K超高清、超大光圈等新技能。
The recent two years, with HD cameras used in security monitoring areas continues to expand, the femoral artery HD monitoring lens technology also followed the camera's footsteps, constantly cut, showing a 4K Ultra HD, large aperture and other new skills.
1.4K超高清技能
1.4K Ultra HD skills
在去年北京安防展上,很多安防厂家纷繁展出了4K超高清摄像机。4K超高清技能呈现之前,干流高清监控镜头像素为六百万以内。4K超高清技能的呈现,对镜头的解像力提出了更高的请求,4K镜头的规划、制作难度都会增大很多,即便日系镜头厂商,现在也只要寥寥几家推出了4K镜头。海康威视于2014年10月发布了一款大靶面(1/1.7英寸)4K超高清镜头,这款镜头支撑1200万像素,能供给超高清的图画细节的一起,具有165度超广视角,很适合于广场、路途等场景的监控需要。
At the Beijing security show last year, many security vendors displayed 4K ultra high definition cameras. Before the 4K Ultra HD rendering, the HD HD surveillance lens has a pixel size of less than six million. 4K Ultra HD skills, the lens resolution put forward higher request, 4K lens planning, manufacturing difficulty will increase a lot, even if the Japanese camera manufacturers, is now only a handful of the launch of the 4K lens. Hikvision released a large target in October 2014 (1/1.7 inch) 4K Ultra HD lens, this lens can support 12 million pixel ultra high-definition picture supply details together with 165 degree ultra wide angle monitoring, it is suitable for square and road scene needs.
2.超大光圈技能
2. extra large aperture skills
跟着安防监控日趋高清化、网络化、智能化,摄像机的运用规模也越来越广泛,很多监控条件差、光线暗淡的地方也请求安装功用多样的摄像机,特别是低照度高清摄像机,以满意全天候24小时监控的需要。关于夜晚等低照度环境,假如摄像机收集光线不行,会形成画面很暗的状况,影响清晰度。摄像机低照度功用的提高,超大光圈镜头是关键技能之一。
Along with the increasingly high-definition, security monitoring network and intelligent camera, the use of the scale is more and more widely, many monitoring conditions are poor, dark areas also request the installation of cameras function diversity, especially low illuminance HD cameras, with satisfying all-weather 24 hours of monitoring. About low illumination environment such as the night, if camera collects ray not to be able to, can form the picture very dark condition, affect clarity. The enhancement of the camera's low illumination function is one of the key skills in the extra large aperture lens.
这款镜头仅从参数来看,就满足震慑,至少是现在日系品牌镜头也找不到的。首要这款镜头选用超大光圈技能,光圈F数到达0.95,与光圈F1.5的通常镜头比较,在一样焦距下拍照低照度场景,这款镜头的图画亮度要高很多。一起此款镜头选用稳定光圈技能,在全焦段恣意焦距下运用时,镜头的最大光圈值都是0.95。在夜间等较暗的环境下,稳定超大光圈技能让监控画面更亮,然后确保了夜间监控的高清化。
This lens only from the parameter point of view, to meet the shock and awe, at least now the Japanese brand lenses can not find. First of all, this lens uses super aperture skills, the aperture F number to 0.95, and the aperture F1.5 usually lens, in the same focal length camera low illumination scene, the lens of the picture brightness is much higher. With this lens, select the stable aperture skills, in the focus of the focal length of the use of focus, the maximum aperture of the lens is 0.95. In a darker environment at night, stabilizing the extra large aperture allows the monitor to be brighter, and then ensures high definition of night monitoring.
四、结语
Four, Epilogue
高清化已是视频监控职业开展的必然趋势,高清设备也是各大安防厂商逐鹿商场的必备兵器。作为在成像过程中起到关键作用的镜头,自然是高清化脚步的排头兵。在高清化的大潮中,已有的镜头规划、制作技能会不断老练和遍及,新的技能如文中介绍的4K超高清技能、超大光圈技能,也会不断前进和运用,也进而加快镜头的高清化脚步。
High-definition video surveillance professional development is inevitable trend, high-definition equipment is also the major security companies chase the necessary weapons shopping malls. As a lens that plays a key role in the imaging process, nature is the vanguard of high-definition footsteps. In the definition of the tide, the scene planning, production skills will continue to mature and spread in new skills such as the 4K Ultra HD skills, large aperture skills, will continue to advance and use, thus speeding up the pace of HD is shot. 
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