This infrared equipped outdoor dome camera has an impact resistant dome and a
tough aluminum alloy one-piece base that resists tampering
and casual vandalism attempts. A high resolution video sensor
provides a crisp, sharp image at 540 TV lines.
SMART LED Control
SMART LED control is built into the camera's video processing
chipset. When the camera enters IR mode, it detects the
amount of infrared light on the subject and turns IR LEDS on/off
as necessary to keep video quality high. To little or too much IR
(washout) is never a problem with
this camera.
Aspherical Lens
Most users focus a camera lens using
visible light. While infrared (IR) light is present in all
visible light, the amount is so small no one needs to consider
it one way or the other. Visible light and IR light have
different wavelengths and strike the lens at slightly different
areas, so the perfect focal point for an image created by IR
light will be slightly different than for the same image in
visible light. This makes IR images sometimes appear slightly
out of focus - a phenomenon known as "focus shift".
An aspherical lens compensates for IR
focus shift with its shape. Instead of using a perfect sphere
model when creating the lens, a slightly flattened sphere shape
is used, hence the term aspherical. In operation, this lens
shape guides IR light to the same focal point used by visible
light. This makes an image formed by IR light just as clear and
sharp as images formed by visible light.