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How to use infrared light in the dome camera by guard summer

Article Author Biography
How to use infrared light in the dome camera by
Article Posted: 08/20/2014
Article Views: 193
Articles Written: 129
Word Count: 724
Article Votes: 0
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How to use infrared light in the dome camera

Business,Electronics,Science & Technology
The main part of the infrared dome camera includes an infrared interface section, power section, code section, PTZ control section, part of the infrared fill light, movement module. Conversion which interface partially completed external interface isolation and protection as well as part of the signal; supply partially completed AC24V / Hi-PoE power converters needed for the internal power supply, such as DC12V, DC5V, DC3.3V etc; complete video compression coding part encoding and network transmission; PTZ control PTZ control some of the major completed; infrared light infrared light to complete some of the major drivers and switches; module is the core component of the movement dome, complete image capture, auto focus and zoom lenses. For more integrated, while reducing costs, some manufacturers put the coding part of the merger movement module, known as the network movement, as well as the manufacturers of the PTZ control section main processor CPU and coding part of the merger, the entire products on a processor, integration is very high, the cost will be lower. Initially monitoring fill light using a low-power infrared light more stars, then there is a period of time using the array of infrared light, up to now most of the use of high-power lights. High lights include laser infrared light, white light, high-power infrared light dot. Application of laser infrared light mainly through synchronous zoom, white light is mainly used in color image of the occasion demands, high-power infrared light dot matrix There are two main applications: synchronous zoom and segmented lit, focus on what it below two ways. Synchronization zoom infrared dome camera zoom in one machine can be achieved during the viewing angle and perspective of the size of the infrared radiation sync adjustment. This feature enables infrared light irradiation angle adjustment mechatronics body called IR dome camera synchronized zoom module, synchronized zoom module consists of infrared light board, lenses, stepper motor composition, light board, or use a multiple high-power infrared light, infrared wavelengths can be 808nm, 850nm, 940nm one of them, but it should be noted that the shorter the wavelength, the closer the visible, better induction effect sensor, so if you do not require no red exposure, as much as possible short wavelength infrared light. Infrared light board is fixed, there is a light in front of an optical lens, lens specially designed and mold, optical and infrared light to match, you can rotate to change the distance between the lens and the lamp by controlling the stepper motor, thereby changing the angle of the light infrared light achieve continuous beam angle, uniform light distribution on the screen. Specific method called infrared synchronization zoom function. IR synchronization zoom function can be used in high-definition infrared dome camera, infrared HD gun camera above. IR synchronization zoom infrared light irradiation angle can be achieved with the camera angle changes synchronized adjusted so that the fill light can be more limited focus, improve the efficiency of the infrared illumination. Its illumination uniformity, can effectively solve the flashlight effect. Under the same illumination conditions, low-power infrared light help to improve life. Fill in the same optical power, the higher the efficiency. Use a small amount of high-power LED lights, no irradiation dead throughout the zoom range. However, the development of infrared synchronization zoom higher technical requirements: First, the need for mechanical structure, transmission, optical cooperate on design, machining and assembly demanding; followed by software processing complex, requiring integrated camera with zoom fill light simultaneously, but for different machines core, we need to match the test light and images. Each device needs to be calibrated optical axis production, higher production requirements. Segmentation approach is lit dot matrix to multiple high-power infrared light is divided into two groups or three groups, these groups use infrared light at different angles spotlight Cup, including a large angle, medium angle and small angle lens when the movement at different focal lengths, open infrared light at different angles. Sectional lit the way has the following disadvantages: There is inadequate or insufficient fill light to focus the issue of different multiples middle section; different set of lights switching process, the light changes to focus greater impact; part of focal lengths with a flashlight effect; part of the focal lengths of light utilization less. Of course segmented lighting design, production and use are relatively simple, so the current manufacturers use more.

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