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6. Terms
This section introduces important terms in NcStudio V12 CCD Control System.
Focal Length
Only when Z-axis moves to a fixed position, you can get a clear picture. This position
is the focal length.
Magnification
Image algorithms takes pixel as its unit and machining of the machine takes
millimeter as its unit. The proportional relationship between these two units is
magnification.
Example: Magnification is 200, means 200 pixels is equal to 1mm.
Offset between Spindle and CCD
When the machine machines with CCD, the position of the actual point is obtained
according to the position of the picture and the shooting position; however, in actual
machining, it is the spindle that is used. The distance between the two is the offset
between the spindle and CCD.
Exposure
It refers to the light amount on the photosensitive element during shooting.
It is controlled by aperture, shutter and light sensitivity.
The exposure value means the combination of aperture and shutter. The aperture
and shutter are offered by cameras that can give the same exposure.
Gain
It refers to the camera’s gain.
Along with the camera’s Exposure, it is used to compensate light during imaging so
as to improve image quality.
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