Typical Ccd Phenomena - Sony XCL-5005CR Technical Manual

Digital video camera module
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Binarization (XCL-5005 only)
Outputs an binarized image. Sensitivity can be changed.
Note
The CCD is driven at high speed during a Partial scan or
Binning operation. In this situation, if intense light is
input to the camera, the peripheral areas of the video
image may be affected. In such a situation, adjust the
amout of light using the iris.
Note
(XCL-5005CR only)
Some fading will occur with the color filter of the color
CCD after prolonged exposure to bright light. In
addition, some variation may occur in the spectral
sensitivity characteristics of the built-in infrared-cut
filter for reasons such as change over time. The above
factors may result in variation in coloring after extensive
use of the camera, but this does not indicate a
malfunction.
In such cases, simply readjust the white balance.
4

Typical CCD Phenomena

Typical CCD Phenomena
The following effects on the monitor screen are
characteristic of CCD cameras. They do not indicate any
fault with the camera module.
Smear
This occurs when shooting a very bright object such as
electric 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, since the CCD imaging
element uses an interline transfer system.
Vertical aliasing
When you shoot vertical stripes or lines, they may
appear jagged.
Blemishes
A CCD image sensor consists of an array of individual
sensor elements (pixels). A malfunctioning sensor
element will cause a single pixel blemish in the picture
(This is generally not a problem.).
White speckles
While CCD image pickup device is made by an accurate
technique, imperceptible speckless may rarely come up
on the screen due to cosmic rays and so on. This is
connected to the principle of CCD image pickup device,
not a malfunction. And the white speckless are easy to
come up in the following conditions.
• Using the camera in high temperature
• When turning up the gain
Level difference between left and right
As CCD used in this camera adopts the left-right 2 ch
output system, left half and right half of the image area
are output individually. Sometimes a level difference
may appear in the center of the window according to the
setting mode of the camera. This is not a malfunction.
Note
If strong light enters a wide area of the screen, the screen
may become dark. This is not a malfunction.
If this occurs, avoid strong light or adjust the lens iris to
reduce the light amount.

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