Security IR camera technology looks forward to the new breakthrough (1)

As the name implies, the infrared camera in the night vision mode, the camera will emit people invisible infrared light line to illuminate the photographed objects, turn off IR filter, to no longer block the IR to CCD, the infrared reflection by objects enter the lens for imaging, now we can see from the infrared reflectance image instead of the visible light reflection, that is, at this point to images photographed dark environment invisible images.

At present, the market of infrared camera products widespread defects are: Red Flash problem, life issues, angle, light quantity shift the focus of the issues, problems, color problems, sensitivity, range of issues.

Especially in the visible and infrared wavelengths, so the focus point, formed the picture cannot simultaneously crisp day and night. The industry standard loss also seriously affect the infrared camera products.

Infrared camera anyway upgrade and facelift, are faced with life and two infrared distance.

Although the IR camera distance and service life also cannot use "inversely" to describe, but to far infrared transmitter, with high power led, power, LED will generate heat, would create infrared attenuation. And heat dissipation is out, will affect the camera CCD chip. LED itself package can withstand high temperature, but each CCD chip heat-resistant temperature, there are more than 65 ¡æ protection status occurs, the picture appears white dust, turn the camera on "strike"-so many production infrared camera manufacturers to improve camera life, mainly around how to make infrared camera not fever and how to make infrared heat powder out of the camera to make a breakthrough.

Technology breakthrough in promoting infrared camera performance

Despite the existence of infrared lamp LED to very large technical defects, as market demand, the current infrared gun-camera yield conservative estimates should also be accounted for to the overall proportion of 50% or more.

With infrared technology, past technical bottleneck is breakthrough: thermal issues, life issues, as well as infrared efficient conversion issues advanced product design concepts, and so on are all in the breakthrough, infrared LED Array (the array infrared light) is to address deficiencies and LED the birth of the new infrared technology.

LED Array infrared array has completely changed the short life LED, IR distance short, infrared effect is not the ideal situation.

LED Array for highly integrated LED, an LED Array is equal to a hundred LED, so the same volume of luminous body LED Array of higher brightness LED many times. LED Array of luminescence of the original half-power point to about 150 °, can be changed by optical means different perspectives to achieve variable angle, LED Array is different from the ordinary way LED packaging, avoids thermal infrared lamp service life decay are also higher than the LED four to five times. As the LED Array of emerging and maturing, and large areas of application, its production costs should continue to decline and eventually replace normal infrared LED, a night vision a mainstream product.

The earliest infrared camera is a simple 12 bright LED lights and camera integration, coupled with the single filter, it is difficult to balance between day and night, and the initial permanent LED is independent, thus reducing the life of infrared lamp.

And improved filters and increase of photosensitive, infrared light can be controlled using time, thereby extending the life of the infrared light.

Double filter technology through hardware to toggle activate infrared lamp, so that a more accurate control of infrared lamp life, and the image is also considerably more than the previous single filter effects, clarity, image restoration effect, perspective correction, etc. are a great improvement.

Guangzhou electric Bell Electric Co., Ltd. technical engineer Chen-Chi, American Electric Bell currently most infrared products are double-filter, enhanced image reduction in noise reduction of performance on the clarity of the image.

To improve thermal infrared lamp life, American Electric Bell uses a light switch circuit, to reduce their working time; the use of a variable pressure regulator rectifier circuit, make it glow power to bring into full play, improves the life of infrared lamps; development of filament protection circuit; increased inertia off circuit prevent environment of optical interference.

Enhance the picture quality to extend life

Because infrared lamp has a price advantage as well as the technical characteristics of simple structure, resulting in a large influx of camera manufacturers and product homogeneity in the status quo, in order to change the security market supply and demand "together", some manufacturers from software interface, DSP programmes to refine function button, the improvement of human actions, the programme of upgrading from the DSP, adjust the color quality and high resolution levels of noise, and other means.

There is also a manufacturer from circuit design, lens choices for improvement, but more manufacturers from external hardware technology crimes, such as the thickness of the aluminum shell, process precision mould, exert surface paint brightness.

To avoid the ordinary spherical camera transparent dome on infrared multiple reflection resulting in many shadow image, after two years of technological accumulation, jesco e successively in 2009 launched the eye series IR speed dome, IR speed dome.

The series has a modular design, the infrared light source and waterproof camera separation type, i.e. the part structure with separate waterproof structure. Camera, motor drive parts, infrared light source, electrical control unit independent packaging waterproof. Design of large area aluminum-alloy heat at the same time, reduce the heat of the IR source itself.

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