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How to choose a laser surveillance cameras
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Posted: March 10, 2014 |
Night vision surveillance technology come from technology category can be divided into active and passive infrared surveillance technology infrared surveillance technology. Thus , we can monitor night vision products are divided into two categories: active and passive night vision surveillance products monitoring products . Common active night vision surveillance products mainly ordinary infrared cameras and laser cameras, passive night vision surveillance products have night vision and infrared cameras . In terms of product features and positioning, common infrared camera suitable for monitoring a range of 100 meters , the laser camera can usually see the 3000 meters and longer distances , and can be used in all-black environment ; while shimmer night as the instrument for less than 1000 meters , moonlight and other weak light environment, infrared imaging is applicable to a wide range of environments wide-angle monitor distance 1000 meters or more, but can not distinguish between image detail , can discern the outline of the image, the majority of requirements apply only to the case of finding the target to achieve a specific environment.
From the perspective of product applications , these night vision surveillance products is very obvious advantages and disadvantages . The cheap price of ordinary infrared cameras , high market penetration , mainly for residential surveillance, monitoring, and some of the short-distance corridor small places need night vision surveillance . But also due to lower barriers to entry products , product quality varies greatly . Because of the physical limitations of the technology itself , making the infrared radiation from the common LED lights are difficult to break through 100 meters . Laser camera image effects good , clearly visible. Identifiable person , within three kilometers person found within 1 km , true to the scene . It monitors the distance and versatility to adapt to the environment is strong , long life, low risk. ( Note also that the same : a laser light source emitting a laser active camera , is generally not visible to the human eye , when using a laser power of the camera , when the human eye as not especially close to the laser light source ) . Ability through the fog on it than the infrared camera has an absolute advantage , compared with the infrared camera is still a certain gap. But cost-effective , the laser is much higher than the infrared camera and camcorder night vision . Infrared cameras and night vision devices suitable environment has been the military , criminal , man-portable , and other specialized fields , but also much more expensive price . Night vision devices for ambient illumination is required, can not be imaged in the absence of moonlight natural lighting conditions , and the monitor distance is limited, over 1000 meters more difficult. And, under the bright light , dim light tube easily burned during the day can not be used . Infrared can be divided into refrigeration and non- cooling type, the ability to better penetrate the fog , cooling thermal imager observation distance of up to 40 km , commonly used in the military field . And the use of environmental requirements , the need to target and ambient temperature difference can be very good imaging. By ambient temperature impact , poor summer imaging results. However, due to the laser light source is a laser camera is not visible to the human eye , has some hidden advantages and distance night vision surveillance technology, recent years have gradually been public prosecutor, technology law , criminal investigation and evidence collection areas of video and television news reporter special video reported a wide range of uses in the military field .
Laser camera is coupled with the laser light source on the surveillance cameras , laser light spot uniformity using enhanced technology , spot autofocus technology, with strong luminosity , the picture is more uniform, less irradiation power consumption, long life and other advantages. Laser night vision technology is one way to achieve long-range night vision surveillance , because the laser with high brightness, coherence and good, good color , good direction , long life , and the extent of its CCD sensor is larger than the wavelength of the LED 's characteristics You can determine the laser irradiation longer distances , and the light intensity is also much stronger than conventional light sources . In addition , according to custom , to increase auto-off feature , while maintaining detection can automatically detect people and objects up close , and immediately turn off the laser , to further ensure the safety of maintenance personnel.
Laser distance surveillance cameras can be divided in accordance with a laser camera at close range ( effective distance night vision surveillance is 100-500 m) and the distance between the laser camera ( effective distance night vision surveillance is 500-1000 meters ) and long-range laser camera ( effective night vision monitoring distance is 1000-3000 meters ) . Although infrared camera at night will see the images, but often see the human face, in addition , ordinary infrared surveillance limited distance, which in some places demanding security monitoring is very regrettable. Laser camera can ignore the intensity of light , laser and ultra- low-light infrared light component parts , the camera can be achieved in the near total darkness can close HD night vision , while ensuring clear image . Many laser camera has some smart features , it can automatically adjust the length of the lens according to the distance and speed of moving objects in order to provide a clear image quality. Laser surveillance camera infrared camera is three times the normal life . This is needed in the next 24-hour monitoring of the environment , more outstanding advantages. Traditional thermal infrared camera is large, not only consume more power , and heat dissipation is not out of the fuselage , causing the body to overheat, seriously affecting the life of electronic components in the camera , and the camera does not have this laser risks. For nearly a decade laser night vision technology in China , it belongs to an active infrared night vision technology , the principle is the laser point light through an optical diffusion , achieve the purpose of lighting at night , which is more than the 808,940 wavelength , 980nm, a near -infrared light. Laser night vision surveillance systems using high amount of light through night vision lens receives the reflected light imaging target , and then low-light CCD camera to capture and output. Lighting systems, imaging lens , the camera of the three core components of the system , co-ordinated , any link will cause the whole system bottlenecks less than ideal results. Current market integration of common laser night vision cameras and laser night vision cameras split , and are based on optical and electrical integration , and integration technology, can clearly monitor the activities within the target range of 100-3000 meters in the dark of night , day , as up to 3000 meters. Application of high-power semiconductor laser design technology laser cameras , installed in the same volume , net laser output power, in order to truly achieve the nominal distance monitoring . Camera Module secondary development optimization techniques , under the same lighting conditions , high-definition images . High-speed image focusing algorithm design, can solve the image autofocus is slow at night or under low light conditions or repeatedly focused issues. The camera zooming , intelligent automatic laser illumination area can fill the screen , without human intervention , you can also manually adjust the distance and angle of the laser irradiation intensity . Good laser camera laser safety aspects of the product to be fully taken into account when the laser power on self test remains closed automatically to the maximum dispersion angle of the laser starts. Power density of the laser can be automatically controlled to meet the prerequisite of ensuring the lighting under the high power density of the strict limits designed to meet national security laser power density standards.
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| Posted By: | ShenZhen Apexis Electronic Co.,Ltd | Description: | Apexis is a high-tech company specializing in manufacturing ip cameras.supply ip camera,network camera,surveillance camera,wireless ip camera,wireless webcam,security ip camera,wifi ip camera,mini ip camera,poe ip camera,box ip camera,ptz ip came... | Phone: | 86-755-26509025 | City: | Shenzhen, China | Website: | http://www.apexis.cc | |
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