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Vandal Resistant IR Bullet Camera
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Chapter 4 - Typical CCD Phenomena
The following effects on the monitor screen are characteristics of CCD cameras. They do not indicate any
fault with the camera.
Smear
This can occur when the camera is pointed toward a very bright object, such as electrical lighting, the sun,
or a strong reflection. This phenomenon is caused by an electric charge induced by infrared radiation deep
in the photosensor. It appears as a vertical smear because the CCD imaging element uses an interline
transfer system.
Vertical Aliasing
When the camera is pointed toward vertical stripes or lines, they may appear jagged.
Blemishes
A CCD image sensor consists of an array of individual sensor picture elements (Pixels). A malfunctioning
sensor element causes a single pixel blemish in the picture. This is generally not a problem.
White Speckles
A CCD image pickup device uses accurate techniques to capture an image, however imperceptible
speckles may occasionally appear on the screen. This is related to the principles of a CCD mage sensor
pickup device and not a malfunction. The white speckles could appear under the following conditions:
• Using the camera in high temperatures
• When turning up the gain
Blooming
This is a phenomenon is which the light from very bright objects appears to overflow into neighbouring
areas of an image.
Note : If strong light enters a wide area of the image the screen may become dark. If this occurs, move the
camera away from the light source or adjust the iris to reduce the amount of light entering the lens.
