Tuesday, June 30, 2009

hidden IR illuminator

A night vision security camera allows one to see in the total dark. This type of surveillance device is very popular in systems where improved security at night time is required. Many a night vision security camera comes with a hidden IR illuminator. Heat, as in infrared energy, is emitted from every living organism. Humans with their body temperature of ninety-three degrees Fahrenheit emit infrared energy with a wavelength of nine to ten micrometers. IR illuminators are calibrated to pick up on any wavelength from eight to twelve micrometers. This feature, known as thermal imaging when the camera transmits those differences in IR wavelength as an image, further enhances the efficiency of this type of camera.
Other types of night vision security camera use an image enhancement procedure to convey images, whereby light emitted at a higher frequency than the IR wavelength is used. This type of process transmits as the green-colored images of night vision technology. The night vision security camera provides either black and white or color images. On some models, the color switches to black and white at night. Usually connected using an AC cord, some are even wireless. Presented in a wide range of styles and designs and in colors like black aluminum or white casing. There is a model for every taste and purpose. Usually weather proof, there are cameras for outdoor or indoor use. Some can even be hidden in smaller devices
The term night vision IR illuminator refers to the capability of an instrument to operate under low light conditions and to process images even in total darkness. Prior to the invention of this technology, observing a subject was significantly limited by the availability of ambient lighting. As such, the use of binoculars, goggles and telescopes were generally performed at day time. This restricted many activities that relied heavily on optical instruments.
With the use of night vision in many types of optical instruments, however, this is no longer a problem. Although technologies utilizing thermal imaging are also used, the most commonly found in optics is IR or infrared, which allows the user to view objects in the absence of light. Today, night vision can be found on digital cameras, rifle scopes and optics used for observations
You can use a hidden camera to find out what your child's caretaker or your housekeeper are up to while you are away. Or to keep an eye on your employees when you can't be there. Advances in technology have made these device less expensive and easier to install than ever before. Hidden cameras are small enough to conceal almost anywhere, and you can also buy hidden cameras concealed in fully functional everyday objects. You can buy a hidden camera disguised as a smoke detector, a fully functional kitchen can opener, a teddy bear, a working cordless phone, or a CD boombox, to name just a few.
Look for a wireless camera when you start shopping - they are much easier to install and there are no protruding wires to be detected. Your child's caretaker, housekeeper or employees will never suspect that they are being watched. These device are battery operated for convenience, and usually operate on a 2.4GHz frequency, much the same as the frequency used by cordless phones. This frequency provides a minimum of interference and maximum signal strength. You can view the output from a hidden camera on a TV with a video input, or record the output to a VCR or DVR (Digital Video Recorder). hidden IR illuminator