Shading Correction - JAI AD-131GE User Manual

Relation with Exposure Time (RAW) is as follows.
Binning Vertical
"1" (V-Binning Off)
"2" (V-Binning On)
Note: This formula is a reference. The real value may differ du to the internal
microprocessor round off error.
The following table shows the maximum accumulation time in Exposure Time (RAW)
Maximum
Storage
Time
Line
[L]
Time [s]
Auto shutter
Auto shutter works in the range of 1/31 to 1/325 sec (982L to 95L), depending on the incoming
light.
GPIO in combination with Pulse Width trigger
More precise exposure time can be obtained by using GPIO in combination with Pulse Width
mode. The clock generator and counter can be programmed in very fine increments.
In the AD-131GE, previous settings are also available in JAI Acquisition Control.
11.4.

Shading correction

The AD-131GE features a shading correction circuit that can be used for reducing shading
resulting from illumination, lens vignetting or prism shading caused by lenses with a wide
output aperture.
The shading correction circuit divides the image into horizontal and vertical fields, and adjusts
these regions in relationship to the image center.
AD-131GE
Exposure Time(us) => Exposure Time(Raw)
Calculation formula
INT (Exposure time/ (1660/51324000))
INT (Exposure time / (1960/51324000))
V-Binning Off V-Binning Off
Partial Scan Partial Scan
Off
Full Frame Full Frame
982
1/31
1Step
32.344us
38.189us
V-Binning On
Partial Scan
On Off
Full Frame
978 494
1/32 1/53
75
Minimum Maximum
Storage Storage
Time Time
11.490 us 31.761 ms
17.340 us 18.865 ms