Archive for September, 2007

Infrared Security Camera what do I need to know

September 26th, 2007 by Avital Guy

Infrared cameras are getting more and more market share and become a common choice when selecting a security camera for a surveillance system. Let first understand whet are we dealing with from technology and functionality perspective. The need from infrared security camera arise when you need a camera for vary light, low light or low light environment. With a basic understanding of IR Camera technology that question becomes clearer.  

The basic way to understand infrared camera is to describe their functionality as a camera with a flash light. The only different is that the light that produces by the flash light is not visible to the human eye. The stronger this flash light is the larger area its going to light up. For that reason all infrared camera comes with effective distance, which mean how strong is the infrared flash light is and how far area its going to reach. The infrared light in infrared security camera is not active all the time. During the day these camera produces crisp clear color picture, but when the light level drop below 1-2 Lux set level the camera IR light source kicks on and lights the space. The infrared light is produces by small led installed around the lens the more leds the stronger the light is and the larger the space can be lit up. A quality IR camera will list its effective range and angle of its IR beam. 

IR cameras come in a variety of sizes and types. The sizes can range from small bullet cameras to larger more commercial look cameras.

IR Camera 


To see a full variety of IR security Camera visit our
IR Cam Video Demonstration and Information page
 IR Cameras are a best fit for areas with virtually no light that only need coverage in a limited or confined area. Most Infrared security cameras are IP66 Indoor / Outdoor and water proof, so you can easily install them indoor or out door environment 

If large area must be covered with IR technology it can be done by using IR illuminator which are basically large infrared flash light. 

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Security Camera for business

September 25th, 2007 by Avital Guy

Security Cameras are becoming more and more an essential need for every business, from fast food restaurant to retail stores, banks, warehouses, hospitals and more. Any business regardless of its size can benefit from the increased and monitored security. These security surveillance systems bring the business control, loss prevention, management and more.
When you install new CCTV Camera Security System in your business you will benefit from high monitoring business and assent, monitor employee activity, reduce liability, increase employees performance, loss prevention, etc. The money savings from inventory loss, increased employee productivity, monitoring business activities, etc…  make these camera systems pay for themselves.
 

One of the basic functions of surveillance and security camera system is full remote camera viewing and playback, a CCTV Security Camera System can help a business owner ensure that his business was opened on time, monitor inventory activities, and that his employees are being productive. From any where the owner/ manager can securely login, watch live feed from the business, or playback any event or time he wish to view.  
 

Click here to request more information on a CCTV Security Camera Systems for your business


 

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Zoom Lenses for security Cameras

September 7th, 2007 by Avital Guy

As digital security cameras continue to advance even more every day in picture quality and DVR compression, digital and optical zoom lens. When we looking on security camera lens you will notice that the specifications for digital cameras lens or their descriptions measure the lens as a number of times. For example a lens may be described as 10x or 22x. This spec referred to the zoom ratio.

The Basics rules of Calculating the Number of Times or Zoom Ratio.

Security cameras have feature that called a focal length. This spec applies to any security camera regardless of the type of lens. The focal length is measure the distance from the optical center of the lens to the camera’s focal point.

Security camera focal lenght 

For security camera without a zoom lens the focal length is called fixed lens as the lens never changes position. Therefore the distance or focal length between the lens and sensor stayed the same. Security camera which have the ability to zoom in and out are called Vari-Focal security camera.

When using security camera zoom lens the position of the lens changes as you zoom in or out. As you zoom in the focal length increases. As you zoom out the focal length decreases.  The focal length of security camera is always measured in millimeters. The 5 mm represents the minimum focal length when the zoom is not being used. The max 50mm is the focal length when the zoom is fully extended.

Digital Zoom
It is common to see two zoom ratios in a security camera spec. One is for optical zoom already discussed above and the second is for digital zoom. Digital zoom is completely different to optical zoom. Rather than using the lens to zoom in or out, security camera digital zoom is carried out by software inside the camera or the DVR system. Basically the software increase the size of the image to give the impression of zooming in. stretching the picture size will usually create decrease in picture quality. Therefore optical zoom is considered far superior to digital zoom.

On a security camera offering both optical and digital zoom you can use both stimulatingly. For example a camera with 10x optical zoom and a 4x digital zoom can give a combined total of 40x zoom.

Zoom Security camera 

Zoom Security camera.
Security cameras are divided to number of groups. Box Security camera, Dome Security camera, Bullet camera, Infrared camera, PTZ camera, Etc. PTZ camera are security camera that give you the option to remotely control Pan-Tilt- Zoom of the camera. Zoom security camera in the other hand has the functionality only to zoom in or out remotely, controlled by a DVR or keyboard control device. Zoom camera is vary function and let you zoom in and out in with high picture quality and control. Zoom security camera is using the same technology of PTZ camera which requires the use of PTZ controller. For more information on how to install PTZ camera please refer to the article

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