Axis 2400+ Instrukcja Użytkownika Pobierz pdf (Strona 24)

Always use auto iris lenses with outdoor cameras.

They adjust the amount of light that reaches the image

sensor. This will give the camera better dynamics and

protect the image sensor from becoming damaged by

strong sunlight.

Lighting

When using cameras at night you might need additional

external lighting. This should be arranged so as to

avoid any reﬂ ections and/or shadows.

For covert security, Infrared (IR) illuminators can be

used instead of normal lighting. IR light is not visible to

the human eye, which means that whilst it is sufﬁ cient

for capturing images from IR cameras, it cannot be seen

by intruders.

You can connect traditional IR-sensitive cameras to

a network via a video server, or connect IR-sensitive

network cameras directly. Note: Color cameras do not

work with IR light. See also Infrared, on page 26.

Avoid direct sunlight

Always try to avoid direct sunlight in an image. Direct

sunlight will “blind” the camera and can permanently

bleach the small color ﬁ lters on the sensor chip to cause

stripes in the image. If possible, position the camera so

that it faces away from the sun.

Mounting a

camera outdoors

If a camera is to be mounted outdoors, you need an outdoor casing to

protect it. These are available from Axis and many other surveillance

suppliers. Outdoor casings come in different sizes and qualities and some

versions have built-in fans for cooling and/or heaters for warming. This

allows the cameras to be mounted in relatively hostile environments.

If you mount a camera behind glass i.e. in an outdoor housing, make sure that

the lens is close to the glass. If it is too far away from the glass, reﬂ ections from

the camera and the background will appear in the image.

C AMERA BASICS

IR lamp suitable for use with an AXIS 2420 Network Camera - IR Sensitive.Outdoor casing suitable for use with Axis network cameras.

CAMERA CAMERALENS LENSGLASS GLASS

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Axis 2400+ Instrukcja Użytkownika Strona 24