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Shading Correction
The shading correction is a function that corrects non-uniformity (i.e., shading) in the amount of light
generated by the lens and lighting equipment.
The following shading correction modes are available on the camera.
■ Flat shading correction
The range of brightness that can be corrected is within ±30% of the region with the highest signal level
on one line.
Command
Complete correction may not be possible depending on the optical system and light source you are using.
Data based on corrections performed under factory conditions is stored for this function.
■ To perform the shading function
The function is turned ON/OFF via serial communication.
This function is not dependent on the operation mode, but is effective when used during actual use.
You can also save the setting and have it applied whenever the power is subsequently turned on. For details on
saving the setting, see "Step 7: Saving the Settings" (page 17).
Black Level Correction
Black level correction is a function for adjusting the setup level.
When this function is used, the following is performed.
-133 to +255 LSB@12-bit
Variable Line Rate
You can set the line rate to 1L or more.
This function can be used to match the scanning speed of the camera to the feeding speed of the
object or to lengthen the accumulation time to increase sensitivity.
• Variable range: 66 Hz to 199.5 kHz (5 µs to 15.13 ms)
• Variable unit: 10 ns (1clk)
• Supported operation modes: Exposure Mode OFF / internal trigger
You can also save the setting and have it applied whenever the power is subsequently turned on, but this
requires additional operations.
Switching and settings storage for this function is performed via serial communication.
The black level will change depending on the line rate, so be sure to readjust the black level after changing the
line rate or trigger period.
SDR = 0: Flat shading correction
Exposure Mode Timed / internal trigger
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SW-4000M-PMCL
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