Ccd Characteristics - Hitachi SICOLOR DIG K550 Operation Manual

Ccd color camera
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CCD characteristics

The following effects can occur with CCD elements and do not indicate malfunction.
Smear and blooming
When a strong light, such as a lamp or reflected sunlight, strikes the CCD, a band
appears to extend above and below the image of the light. Install and aim the camera
in a manner that avoids directly picking up strong light sources within the scene.
Fixed pattern
Fixed pattern noise can occur in the picture when the camera is used at high ambient
temperature. The effect is most pronounced at high sensitivity settings.
Moire pattern
Moire is a phenomenon whereby interference between two patterns produces a third
"phantom" pattern. The CCD pixels are arranged in a pattern and when another
pattern (e.g., a performer wearing a finely striped necktie) is picked up, interference
between the patterns can produce the moire effect.
Burn damage
When used for extended periods under very strong light, the CCD internal spectral
filter can be discolored. Avoid using the camera for long periods of time in locations
subject to strong light.
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