Facts about our Infrared Security Cameras
Infrared light lies between the visible and invisible (microwave) portions of the electromagnetic spectrum. Infrared light has a range of wavelengths just like visible light has wavelengths that range from red light to violet. "Near infrared" light is closest in wavelength to visible light and "far infrared" is closer to the microwave region of the electromagnetic spectrum. The longer wavelengths are about the size of a pin head and the shorter, near infrared ones are the size of cells, or are microscopic.
The human eye is not designed to pick up infrared light so a beam of infrared light is invisible. The source of the infrared light, depending on the wavelength, may or may not be visible as a small red or orange-red dot (about the size of a match head).
Our infrared security cameras detect infrared light reflected from objects in the field of view. The image appears in monochrome (black-and-white). These cameras contain an internal array of infrared LEDs under automatic control. The range of detectable infrared light cast by each array depends on the video sensor and the camera design (number and placement of IR LEDs). Check each camera description for the IR LED range specification to be sure of the range for the security camera in question - we have cameras that cast a 30', 60', and 120' beam (or greater). We also carry IR projectors that are designed to cast a wide, long range IR beam for cameras that do not have internal IR LEDs. Keep in mind that atmospheric conditions will effect the effective range (fog, snow, rain, etc.).
All of our infrared cameras auto-switch between normal daylight color mode and infrared monochrome mode without user intervention of any kind. |
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