Product DescriptionThe book is perfect for personal investigations, secret surveillance and other covert activities, he is a spy camera that no one could ever hope, and certainly not be on the lookout. . . . More>>
1 / 3 “CMOS CCD 380TVL CCTV Wired Camera Security Surveillance SRT-201W
Product DescriptionBrand new security CCTV CMOS CCD camera with 380TV lines, support PAL Effective Pixels, support DC12V/500mA diet is perfect for the investigation of individuals, covert surveillance and other covert activities. . . . More>>
There are normally six things to look before choosing a CCTV security system; 1. Cameras Selection 2. Registration Options 3. Detection 4. The date and time 5. Cable and connectors 6. Camera Protection1. 0 Camera Selection 1. 1 Location Does the camera is located inside or outside? If outside, then you must make sure it is appropriate to the environmental conditions that are likely to be encountered such as rain, snow, sun glare, low light, etc. outside of video surveillance systems security camera Outdoor cameras should be classified as either weatherproof or mounted in a special box for protection. All CCTV cameras supplied by external Voltek are resistant to weather and cable entry points are sealed. The son of a length sufficient to allow connections to be made inside the building. 1. 2 levels of light Choosing the right camera based on the amount of light available is very important for an effective security system. A regular color or monochrome cameras will not give very good pictures in low light conditions while the monochrome is more effective than a single color equivalent. Solutions available for low light conditions may include: * B & W cameras with built in IR illumination * Color Day / Night Cameras * The use of additional security lighting * The use of a separate IR illuminator in combination with a monochrome camera. When using infrared lighting to ensure that the range of illuminators is sufficient for your needs. Lighting levels are generally measured in lux, and although the light may be about 10,000 lux, dark can be as low as 1-10 lux in total darkness is 0 lux lighting side streets may also be less than 1 lux, in some cases. More than one unit is assessed at 0 lux, the better its performance in low light. 1. 3 colors, black and white or Day / Night Cameras B & W cameras generally offer better image quality than the color of light at lower levels. They are also generally less expensive than equivalent color specifications. Color cameras require the availability of good lighting and generally provides better recognition ability. Day night cameras to provide the best of both worlds in an external environment. They function as color cameras during the day (or in good light conditions) and automatically to B & W when the fall of light levels. All day night Voltek cameras come with built-in infrared illuminators that allow the cameras to see in the dark. 1. 4 WirelessWireless wired or CCTV cameras are easier to install. There is no wiring to run from the camera to the receiver and they are ideal for temporary applications, rapid deployment or when the cable running is not desirable. TheDay night wireless security camera CCTV cameras do not require a power source, however, and while most will be able to be powered by batteries do not last very long life – a matter of hours in cases. Wherever possible, the cameras must be powered by the network. Typical range for wireless camera systems is 100 meters in free space, but which can significantly reduce about 20 meters in a typical home. In some cases, there is also the risk of interference when using wireless systems. 1. 5 deterrent visible or hidden / covert surveillance To deter the use of cameras visible housed in more conventional loudspeakers are ideal. For applications or discreet secret supplies Voltek Discreet or Covert CCTV security cameras which are: * Very small and can be installed in secret locations, or * In enclosures designed to disguise the presence of a camera. Many cameras manufactured by Voltek are both elegant and discreet design of their enclosures, which makes them very suitable for domestic applications. 1. 6 Audio If the ability to monitor or record a sound is so important to the unit needs a microphone. This allows monitoring of how audio. Some devices such as SuperCam2 of Voltek have a 2-way speech facility that allows you to talk with your visitor without answering the door. 1. 7 Camera Display Quality The resolution, size and type of sensor the camera will influence the quality of the image visible. Resolution – This is expressed as the number of TV lines (TVL) that the camera is capable of producing. More value addition TVL resolution and therefore image quality. A typical camera input range will be about 300 TVL high resolution camera with a value of 400 + TVL. Size – A larger image sensor gives a better image definition of a small sensor. For example, a third image sensor “will give a better picture of a 1 / 4″ sensor. Type – There are two types of image sensors. CMOS sensors are mass produced and used in cameras, entry-level to provide cost savings. CCDs are used in professional video cameras and provide a superior picture. It is important to remember that the quality of the recorder also affects the quality of the CCTV footage. For example, if you use a high resolution camera, but a recorder of low resolution, then the CCTV images will be captured is still low resolution. 1. 8 Camera Single or multiple camera systems Do you need to protect and display a single zone or multiple zones? If you’re likely to need additional protection areas at a later date, so consider purchasing a system that can be extended if necessary. Voltek has a range of products that allow you to connect and use up to 4, 8 or even 16 cameras. These include: Switcher – These are units that allow a multi-camera system to switch between different cameras. Switching can be done in a number of ways: * Manually by user * Sequential switching between cameras * In case of motion detection by camera PIR. Multiple security cameras switched cameras are connected to the switch and the switch output can be viewed on a TV or can be connected directly to the recording device such as VCR or DVD recorder. CCTV switchers can generally allow the connection of up to 4 or 8 cameras. The control units spectrum Voltek also have other integrated features such as automatic activation and video time and date. It is important to remember however, that using a switch does not allow you to view and record one camera at a time. Standalone DVR – Using digital video allows single or multi-camera systems to be seen and / or recorded simultaneously. Voltek provides a range of 4, 8 and 16 channel DVR allows you to install a CCTV comprehensive. PC-Based Security Systems – These use a PCI card that is installed inside your computer. They allow the connection of up to 4, 8 or 16 cameras and help transform your existing PC into a system of sophisticated CCTV. 2. Options 0 record If you want to be able to save your CCTV footage then the following factors must be taken into account: * The maximum period of registration required * Recording Quality * Recording Method: O Continue o Manual O Led Event – i. e. when the system detects a movement Recording Equipment * o Analog o Digital * Capacity of storage, retrieval and transfer of CCTV images 2. A domestic VCR It is a simple and inexpensive option that can provide good quality images recorded in real time. VCRs can be used to provide a permanent record of the last eight hours or event driven recording when used in conjunction with a PIR camera and VCR activator. When using cameras PIR event led to make the records that you must consider the starting time for the VCR. For example, if the drive takes a few seconds to actually start recording whenever it receives the signal from the camera, then the event may have elapsed before it is registered (a person walking through the range of the camera might have exceeded the scope of vision before the image is captured on tape). In these situations, a separate PIR might be used to trigger recording and overcome this problem. The other thing to keep in mind is that you can not set the VCR to record a television while the camera input is selected. 2. 2 internal DVD RECORDER They operate on a principle similar to interior VCR, but offer additional advantages: * Registration as a superior digital * Storage capacity increased * Improved research and resilience However, for recorders that the startup time before recording actually begins is generally longer than a VCR. To remedy this, it is recommended that an integrated hard disk recorders are used 2. 3 Standalone DVRs They are becoming the most popular method of recording CCTV images. Essentially a DVR is a standalone piece of equipment that is designed exclusively for recording CCTV images. It has a number of advantages ofDigital camcorders Clear safety on traditional analog systems including: * Storage capacity – Days, weeks or months of recording in high resolution is possible through the use of large hard disks * Pursuant Recording Quality – No deterioration of image quality, no matter how you mash on the recording device or how long you store images to * View and search – Quick and easy access to digital images through * Transfer and Storage – The digital format allows easy transfer and storage of images. Transfer and storage capacity is increased by Integrated DVR with CD burners and USB ports. * Remote Access – Many DVRs have the ability to dial from anywhere in the world through the use of a remote PC * Multiplexed recording – Ability to view and record multiple cameras simultaneously. 2. 4 PCI These are digital video capture cards that can be installed inside your existing PC to allow connection of several surveillance cameras. The features and advantages of PCI is very similar to that of digital video recorders. 3. 0 detection Even with systems that have a very long recording capacity, it is not always desirable to record continuously. Registration for the event is led by a more efficient way to capture images relevant and can be achieved by: 3. A PIR motion detectors Some units have integrated PIR detectors and for those who are not, it is possible to install a separate PIR as part of the overall system. In systems with multiple camera PIR sequences that is displayed on the screen automatically changes to the area that has detected the movement. 3. 2: Video motion detection It is used in digital video surveillance systems and works by analyzing the video signal from a camera. The signal changes are recognized as a movement and then used to trigger the recording if necessary. All digital systems Voltek allow users to mark one or more rectangular areas in the display and only when motion is detected in these areas, the system will start recording. Where possible, the use of motion detection is better than PIR motion detection video, especially as most reliable for external use. 4. 0 Time and Date Stamping This feature superimposes the date and time on your CCTV videos. Having this feature can be very useful for determining when an event has occurred and has been recorded, especially if the sequence must be used for evidentiary purposes. For national systems Voltek offers a separate time and date generator that can be added to your system. The spectrum monitoring cameras save lives CCTV installation that already integrated. The facility is also part of the full range of CCTV digital Voltek. 5. 0 Cable and Connectors Security camera son connectors can be plugged into a variety of ways. All household appliances are supplied with our 20m cable and scart and / or phono plugs to connect directly to your TV, VCR or DVD recorder. All professional cameras are supplied with 20m of cable and BNC connector that connects to our range of digital recorders. The camera allows Voltek can be extended up to 100 m in total by using the appropriate extension leads. cable co-axial with a local power supply of the camera can activate the camera located up to 250m away from the screen or recording device. Detailed information on the connectors and cable for each camera Voltek is available on the product page on the site in question. 6. 0 Protection Camera If your device is likely to be the target of vandals, so consider protecting it with a wire cage is a cage Voltel Security camera wire must. This not only your security cameras, but the Vandals protects evidence collected during acts of vandalism. We at For your Home really Voltek with the following guide will help you in choosing security cameras perfect for your homes and gardens
CCTV cameras are among security products that have been forecast to maintain a steady growth trajectory until 2008.
Mainland China and Taiwan are increasing their presence as providers of CCTV cameras. The mainland produced at least US$100 million worth of CCTV cameras in 2004. Taiwan’s share of the global market, meanwhile, was estimated to be at least 25 percent.
CCTV camera manufacturing in mainland China is centered in Guangdong province, which hosts about 80 percent of makers. In Taiwan, production is still largely maintained in Taipei.
Manufacturing capability
Taiwan makers have longer manufacturing experience than their mainland China counterparts. Many of these Taiwan companies have four to 14 years’ experience in manufacturing, and three to 13 years in the CCTV camera business. Thirty-five percent of mainland companies are relatively new in the line — having at most five years’ experience in the business.
Board, water-resistant, dome and speed dome, and miniature cameras compose the bulk of mainland China makers’ CCTV camera line. In Taiwan, production is mostly centered on dome and speed dome cameras.
Sixty-three percent of mainland companies have 20 percent to 50 percent unused production capacity, while 75 percent of Taiwan makers have more than 50 percent unused capacity.
Representative products
Day/night CCTV camera
A bullet camera with Infrared LEDs installed.
Dome/speed dome CCTV camera
A compact high-speed unit with an integral receiver and camera / lens module.
Board CCTV camera
A camera fully contained on a single circuit board including camera optics and all the electronics needed for generating the video signal.
IP CCTV camera
A stand-alone device which allows you to view live, full motion video from anywhere in the world. IP Cameras can be used for surveillance of both homes and businesses.
Component sourcing
Sourcing of key CCTV components, such as CMOS and CCD modules and sensors, ICs, PCBs and motors, is stable.
Key components are primarily sourced from Japan, South Korea, Greater China and the United States. Daiwon, Hitachi, LG, OmniVision, Panasonic, Samsung, Sharp, Sony and Tamron are the major suppliers.
Exports
The CCTV camera exports of respondents accounted for 74. 3 percent of their 2004 total annual CCTV camera sales.
In 2004, mainland China and Taiwan makers exported US$216. 2 million and US$76. 5 million worth of CCTV cameras, respectively.
Asia and North America are the leading export destinations. They accounted for 42. 9 percent and 70. 8 percent of export sales of respondents in mainland China and Taiwan, respectively. Trade shows
4th International Fire & Security Exhibition & Conference
Fire & Security Pakistan brings forth the most advanced and futuristic technology in the specialised realm of security products and services. It displays the best protective technology and deterent products being developed and used internationaly. The Fire & Security Conference will provide an insight on the changing trends and growing demand for safety & security equipment, devices and services in the international markets.
SSSTECH 08, Safety, Security and Smart Technology
The safety and security industry with latest smart technology is booming throughout the Middle East and North Africa as the region deals with increases in terrorism and other security concerns ranging from transaction fraud to private citizen safety. The Middle East and North Africa are now the world ‘ s largest market for air traffic control, radar and airport security equipment and systems with demand outstripping that of Europe and Asia.
EXPOSEC – International Security Fair
Since mankind exists there has been a necessity for security. Originally to protect children and the frail from large animals, a primitive surveillance system was soon set up. This has now evolved over the years to a point where it is now quite possible to remotely, yet clearly, observe a tiny space anywhere around the globe, at any given time. This is a world of new technologies, both existing and developing. To survice in this world it is vital to keep abreast of these new technologies and to have knowledge of the areas where work is being done. All this can be effected by attending EXPOSEC 2008, which will be a major focal point of the Security sector in 2008. It will bring together major suppliers from around the world, with buyers from all parts of Latin American.
ZAK OFFICE SECURITY & SAFETY EXPO
An exclusive trade show on Office Security & Safety Systems under the umbrella of Zak Office Technology Expo covering the widest range of Office Security & Safety Products. The event is a meeting point where companies will present the latest trends in the world office needs.
Online marketplacewww. made-in-china. com is a China leading B2B website. It supply numerous trade leads of security products.
The CCTV Market crossed an evolutionary step forward with the creation of megapixel IP cameras, perceived by many as the future of the CCTV market multi-megapixel (MP) IP cameras are now available that offer a huge jump in image quality compared to conventional surveillance cameras. Example A megapixel surveillance of the most compelling advantages surveillancesystems megapixel CCTV is their ability to capture not only the situational awareness an overview of what is happening but also fine detail that can be used for reading plate and identification. The combination of situational awareness and detail allows security operators to respond more quickly and reduce the time of the survey, all with a greater likelihood of prosecution and conviction. The images below illustrate how the HD megapixel video surveillance systems can take full situational awareness and fine details. A standard camera would be able to display this image and should then be zoomed to show detail using a PTZ and then lose the rest of the image that is out of sight. With this detailed megapixel cameras can be expanded, while the still recording the whole situation. Detail1: Detail2: Detail3 Electronic Pan Tilt Zoom (ePTZ) Any security Nion megapixel includes digital pan / tilt / zoom ePTZ. ePTZ has been developed to solve the problems with traditional mechanical pan / tilt / zoom devices. Mechanical devices let users redirect the camera but only record what you have zoomed in on. This can be a problem when there are more than one object in the scene or if nobody controls the camera. Security Nion Electronic Pan / Tilt / Zoom ePTZ lets you move a large virtual image using a small viewing window. As it is virtual, you can always save the whole scene in the multi-megapixel resolution, even if you can be digitally “zoomed”. This means that you never miss a thing. ePTZ also saves bandwidth. In many cases you do not need to display a multi-megapixel image when you go to the video on a WAN or Internet. ePTZ Nion security allows you to display an image much smaller that shows the entire field of view in a small window. If you see something that interests you, just digital zoom and resolution of security Nion multi-megapixel comes in. When you zoom in, ePTZ this in more detail if you do not suffer the distortion typical with other products. Nion Security CCTV Camera Megapixel Progressive Scan technology benefits: security Nion publish other than 3 megapixels and 5 megapixels produces CCTV. For more product information, please visit our website as following model: NV-ND671: 1. 3 megapixel SONY progressive CCD, PTZ speed dome camera outside. NV-BND752-E: 2. 0-megapixel CMOS, anti-vandal Dome IP, PoE. NV-BND762-E: 1. 3-megapixel CMOS, anti-vandal Dome IP, with Ethernet. NV-ND752-E: 2. 0 megapixel camera Mini indoor dome MV-NC852-E: 2. 0 megapixel IP camera housing. PoE. NV-NC862-E: 1. 3-megapixel IP camera housing, power over Ethernet.
versatile security CCTV surveillance system with two wireless cameras and wireless AV receiver. Have you ever though about the configuration of monitoring your home or office, but think it will be too complicated? Well, prepare yourself to this easy to install wireless surveillance camera system (with audio) that having your own security system, wireless CCTV, finally within reach of the average citizen. The multipurpose security system monitoring kit comes with a wireless receiver with 2 AV. 5 inch TFT LCD screen and two wireless cameras CMOS image sensor of high quality that can be used up to 50 meters from the receiver. This system can operate at temperatures between 0-50 degrees, so they can be used anywhere indoors or in covered outdoor environments. Better yet, it is a system that has advanced features 4-channel auto adjust so the wireless signals are not in conflict with other wireless devices nearby. seen anything interesting? Planning to record “something” on the disk or tape? Then plug the wireless receiver to a recorder via its port A / V OUT for archiving your video security. There is also an A / V OUT port if you want to view your video surveillance on a bigger screen. This monitoring unit multifunction wireless improves both your daily life and improves the home / office security measures. Whether you use this security camera kit to keep an eye on the kids safe or you watch the large work space, this system wireless surveillance handy provides peace of mind at an affordable price. In these difficult economic times, why not save money by staying home and make some improvements on your home during your next vacation? Upgrading your home is a great way to give you pleasure and long-term peace of mind, and you enjoy the security monitoring system much longer than any trip you would have taken some trap crowded with tourists and too expensive. In brief. . . Protect your property and family, instead of a few cameras around your house so you can keep and eye on children or in their game rooms or in the garden. use it as a baby monitor, you will see and hear your baby your baby (audio and video output). Workers relax at work? Well it’s not as Freaky Friday, then install a couple of wireless cameras and see who misbehaves! China Manufacturer Specification Receiver Specifications Display: 2. 5 “TFT LCD Resolution: 480 x 240 receives a signal: Audio and Video Transmission frequency: ISM 2400 – 2483MHz (2. 4GHz) frequency channel: CH1: 2. 414GHz, CH2 2. 432GHz, CH3 2. 450GHz, CH4 2. 468GHz Intermediate Frequency: 480 MHz Receiver sensitivity:-85dBm Frequency Stabilization: + /-100kHz Antenna: 50ohm SMA TV System: PAL Built in Headphone: YES Power supply: DC 12V outlet and battery integrated Built in Battery: 1100mAh Lithium Operating Temperature: 0-50 ° C Dimensions: 123mm x 72mm x 24mm = Receiver (L x W x D) Camera Specifications Transmission Range: Open Space = 50 meters, fortified Environment = up to 25 meters Image Device: 1 / 3 inch OmniVision CMOS Angular Field of View: 45 ° (f = 6mm) recommended ranges for the objects: 1-10M. Max effective range 15M Microphone: YES TV System: PAL 628 (H) x568 (V) Transmission Frequency: ISM 2400 – 2483MHz (2. 4GHz) frequency channel: CH1: 2. 414GHz, CH2: 2. 432GHz, CH3 2. 450GHz, CH4: 2 . 468GHz Scanning Freq: PAL 50Hz Minimum Illumination: 1 Lux Backlight Compensation: Auto White Balance: Automatic Transmission Power: 10dBm Power Supply: 12V DC wall plug Operating Temperature: 0-50 ° C Dimensions: 100mm x 75mm cameras = x 50mm (L x W x D) Manufacturer Ref: Catalog DC10CC1D9DFC Ref: Surveillance after home DIY camera system, Office security camera remote operating Notes four available channels Channel Scan and Channel Skip for multiple cameras Read the manual provided before you install the security system wireless best results The cameras are not waterproof, they should be used in environments covered or inside manual adjustment of focusing lens on the cameras at the initial installation you provide better quality video Do not use the camera around electrical equipment Medical Content Model PAL-CVD-820A240T Surveillance Kit includes the following: – 2 x 2. 4 GHz wireless cameras – 1 x 2. 5 “LCD wireless receiver – 3 x 100-240V AC Adapter – 1 x car charger – 1 set x headphones head – 1 x User Manual (English) – 1 x 3. 5 mm A / V IN or OUT Connect to wholesale discount prices Written by: Gregory, Ali Visit: http://www. electronicschinawholesale. comYou find more. Current Reviews: This product was added to our catalog Wednesday, February 11, 2009.
versatile security CCTV surveillance system with two wireless cameras and wireless AV receiver. Have you ever though about the configuration of monitoring your home or office, but think it will be too complicated? Well, prepare yourself to this easy to install wireless surveillance camera system (with audio) that having your own security system, wireless CCTV, finally within reach of the average citizen. The multipurpose security system monitoring kit comes with a wireless receiver with 2 AV. 5 inch TFT LCD screen and two wireless cameras CMOS image sensor of high quality that can be used up to 50 meters from the receiver. This system can operate at temperatures between 0-50 degrees, so they can be used anywhere indoors or in covered outdoor environments. Better yet, it is a system that has advanced features 4-channel auto adjust so the wireless signals are not in conflict with other wireless devices nearby. seen anything interesting? Planning to record “something” on the disk or tape? Then plug the wireless receiver to a recorder via its port A / V OUT for archiving your video security. There is also an A / V OUT port if you want to view your video surveillance on a bigger screen. This monitoring unit multifunction wireless improves both your daily life and improves the home / office security measures. Whether you use this security camera kit to keep an eye on the kids safe or you watch the large work space, this system wireless surveillance handy provides peace of mind at an affordable price. In these difficult economic times, why not save money by staying home and make some improvements on your home during your next vacation? Upgrading your home is a great way to give you pleasure and long-term peace of mind, and you enjoy the security monitoring system much longer than any trip you would have taken some trap crowded with tourists and too expensive. In brief. . . Protect your property and family, instead of a few cameras around your house so you can keep and eye on children or in their game rooms or in the garden. use it as a baby monitor, you will see and hear your baby your baby (audio and video output). Workers relax at work? Well it’s not as Freaky Friday, then install a couple of wireless cameras and see who misbehaves! China Manufacturer Specification Receiver Specifications Display: 2. 5 “TFT LCD Resolution: 480 x 240 receives a signal: Audio and Video Transmission frequency: ISM 2400 – 2483MHz (2. 4GHz) frequency channel: CH1: 2. 414GHz, CH2 2. 432GHz, CH3 2. 450GHz, CH4 2. 468GHz Intermediate Frequency: 480 MHz Receiver sensitivity:-85dBm Frequency Stabilization: + /-100kHz Antenna: 50ohm SMA TV System: NTSC Built in Headphone: YES Power supply: DC 12V outlet and battery integrated Built in Battery: 1100mAh Lithium Operating Temperature: 0-50 ° C Dimensions: 123mm x 72mm x 24mm = Receiver (L x W x D) Camera Specifications Transmission Range: Open Space = 50 meters, fortified Environment = up to 25 meters Image Device: 1 / 3 inch OmniVision CMOS Angular Field of View: 45deg (f = 6mm) recommended ranges for the objects: 1-10M. Max effective range 15M Microphone: YES System TV: NTSC 510 (H) x496 (V) Transmission Frequency: ISM 2400 – 2483MHz (2. 4GHz) frequency channel: CH1: 2. 414GHz, CH2 2. 432GHz, CH3 2. 450GHz, CH4: 2 . 468GHz Scanning Freq: 60Hz NTSC Minimum Illumination: 1 Lux Backlight Compensation: Auto White Balance: Automatic Transmission Power 10dBm Power Supply: 12V DC wall plug Operating Temperature: 0-50 ° C Dimensions: 100mm x 75mm x 50mm cameras = ( L x W x D) Manufacturer Ref: Catalog DC10CC1D9DFC Ref: DIY Home Surveillance after camera system, camera standoff Office Operating Notes four available channels Channel Scan and Channel Skip for multiple cameras Read the manual that came before to install the wireless security for best results The cameras are not waterproof, they should be used in environments or covered within the manual adjustment of focusing lens on the camera when initial installation to provide you the best possible video quality Do not use the camera around electrical equipment Medical Content Model DVC-NTSC-820A240T Surveillance Kit includes the following: – 2 x 2. 4 GHz wireless cameras – 1 2 x 5. “LCD wireless receiver – 3 x 100-240V AC Adapter – 1 x car charger – 1 set x headphones head – 1 x User Manual (English) – 1 x 3. 5 mm A / V IN or OUT Connect to wholesale discount prices Written by: Gregory, Ali Visit: http://www. electronicschinawholesale. comYou find more. Current Reviews: This product was added to our catalog Wednesday, February 11, 2009.
Manuals and courses TÃ © technicians to learn how to install a security alarm, CCTV and video surveillance over IP. Ebooks format printing in PDF format. Instant Download.
Cursos: Como Instalar Alarmas, Cctv Y VideoVigilancia Ip.
In recent years we have witnessed the appearance of the day and night surveillance cameras, all featuring a “miracle” to boost capacity by several hundred folds of the camera “minimum illumination” by the withdrawal of the filter IR and turning off the circuit of color. Usually, the sensitivity varies from day mode from 1 to 0 lux. 25 lux and jumps to 0. 01 ~ 0. 0001 lux for the night of the camera (B / W) mode. This “miracle” increase is not true, it is a measuring device by exposing the CCD (Charged Coupled Device) High-power infrared emission and hurt a value indicating very low lux. Lux and the infrared power are not the same. Lux is a photometric unit that measures point to point lighting (depending on the amount of light irradiated and the distance between the light source and the illuminated object) while the power unit is an infrared radiometric – measured in watts . Enlightenment, it is possible for us to see all Infrared radiation is invisible to the human eye. The distinction between light and infrared radiation in the frequency or wavelength. The wavelength of the visible spectrum ranges from 400nm (violet) to 700nm (red) which is divided into a rainbow of colors from red to orange to yellow to green to blue and violet. CIE (International Commission on Illumination) also known as the International Commission on Illumination, clearly indicated the extent of light, known as photometry, applied only to the visible Optical spectrum and includes units such as slow light, candle and lux. Measures of human eye detection capacity showed that efficiency is highest in the color green (100% to about 555 nm) and decreases to 50% near Orange (about 610 nm) blue (about 510 nm) and less than 10% by red (around 650 nm) and violet (around 470 nm). Humans can not feel waves radiated in the ultraviolet (below 400 nm) or infrared (above 700 nm) regions. ICE standards are quite complex, but suffice to understand that the value of a source of green light (555nm) with 1W Lumen is equal to 683 lumens, which from a point of measurement point is equal to 683 Candela. However, 1W red (650 nm) light output is equal to only 68 and 68 candela lumen and 1W-infrared (700 nm) light radiant flux is equal to 0, 0 and 0 lux candela. The problem is that few people know what lux and infrared radiation are, or how light and radiation are measured. One device for measuring the illumination in lux is the illuminance meters, also known as a photometer. The meter includes a light filter and is calibrated to measure only the light units in the visual spectrum optical as defined by the CIE. This filter is similar to the IR cut filter to prevent infrared radiation to pass to maintain the accuracy of measurement. That’s why all the counters of known exposure, light meters and lighting equipment as 0 lux reading or a residual value when exposed to infrared radiation. CCTV In light meters are used to measure the illumination of the scene observed by a security camera, but should never be used to measure infrared radiation, because the reading will be 0 lux, or a residue as 0. 001 lux, while the scene can be exposed to substantial amounts of infrared radiation. In order to understand very well the impact that these measures have to design a CCTV system we must first understand how a CCD (Charged Coupled Device) works. The CCD is designed to resemble the human eye, with colors similar detection efficiency. Therefore, the CCDs are more sensitive to green (550 nm) region of the spectrum and decreased sensitivity to 0 in the ultraviolet (400 nm) region. CCDs, however, no longer feel the infrared 700nm and 1000nm (some are more sensitive and can detect up to 1200nm). CCD sensitivity is much lower in the IR region and the efficiency drops to only 5-10% or less, as the chart shows typical CCD performance. Although the effectiveness of the sensor in the IR region is very low, day and infrared radiation which is strongly radiated by the sun, hot objects, the human body and incandescent or halogen must be prevented reaching the CCD color. If IR is radiated in the optical path of a color CCD, it disruptive heavy processing images in color. Therefore, all colors (or CMOS) sensor CCD must be equipped with an IR cut filter that blocks infrared radiation to reach. As explained above, the sensors are much less sensitive to infrared radiation that the visual spectrum. Therefore, the notion that the removal of IR filter increases the sensitivity of the instrument a hundred or a thousand times is a simple case of the distortion induced by wrongful use of a photometer to measure the irradiation infrared. The common test inaccurate for the night mode of a day / night camera is done by introducing a powerful infrared radiator (improperly called Illuminator IR) infrared radiation on a dark stage. The test is done by connecting a CCTV camera (with IR cut filter removed) to a waveform analyzer to measure the output signal. The day / night camera is positioned to observe a scene infrared irradiation. After the meter is positioned on the stage for measuring the infrared radiation in lux. This is a test that generates misleading erroneous results. We will obtain an IR-induced B / W signal in the waveform analyzer with a value such as 20 IRE, while the exposure meter reads 0 lux or residual value, like 0. 01 ~ 0. 0001 lux, which is used in the technical specifications of the camera to set the sensitivity or the minimum illumination. You should be aware that the IRE is a unit of signal level or strength and is not associated with infrared radiation in any way. Good, but more “difficult time” school of the sensitivity of a surveillance camera or minimum illumination is performed by placing a standard source 2000 lux with a focus in front of the camera (connected to an analyzer way of wave) with its IR filter removed. After the first is inserted in front of the light source until the video signal drop measured at 20 IRE. The minimum illumination to be calculated on a basis of the reduction factor of neutral density filter. Neutral density filters are available in various transmission factors and reduce the light intensity ratios such as ½, 1 / 16, 1 / 50, 1 / 100 etc. The neutral density filters are very similar to those used in the objectives auto iris chip. That is why whenever you see a day / night camera with a minimum illumination values as 0. 001 lux or 0 even. 001 lux, try to keep in mind one thing – marketing strategies, sometimes more weight than common sense.
Copyright © CMOSexOD.com. All rights reserved.| Privacy Policy | SEO Training | Alchoholics Anonymous | Indianapolis SEO | Term Life Insurance Reviews | Hybrid Income Annuities | Best Cash Advances
