Adjusting Image Brightness With External Lighting; Adjusting The Brightness - Omron FQ2-S Series User Manual

Adjusting Image Brightness with External Lighting

You can adjust image brightness with external lighting or by setting the Sensor sensitivity.
Using a Strobe Trigger Signal to Control External Lighting
If a Data Unit is connected, you can change the output time of the strobe trigger signal (STGOUT) to adjust the
brightness.
FQ2-S/CH Series User's Manual for Communications Settings (Cat. No. Z338)
Section 2 Controlling Operation and Outputting Data with a Parallel Connection

Adjusting the Brightness

You can adjust the shutter speed/gain or the brightness to make images brighter. The setting method depends
on whether HDR Mode is ON or OFF. The setting methods are described below.
HDR Function: p. 70
Important
The exposure time will be longer for higher values of the shutter speed or brightness. This may cause the image to
blur if the object is moving fast. If the Sensor is used on a high-speed line, check that the images are not blurred under
actual operating conditions.
Brightness Correction Mode (FQ2-S1@@@@@/FQ2-S2@@@@@/FQ2-S4@@@@@/FQ2-S4@@@@@-M)
If the brightness changes inconsistently with each image, turn ON the Brightness Correction Mode.
[Brightness] −
When HDR is ON:
[Gain] −
When HDR is OFF:
When Brightness Correction Mode is ON, the brightness will be consistent but the timing of image capture will
be delayed by 25 ms (when the shutter speed is 1/250 or higher).
When built-in lighting is OFF and the shutter speed is less than 1/250, the image capture timing will be further
delayed.
Make sure that appropriate images of the measured objects are captured when Brightness Correction Mode is
ON.
Timing Chart When the Brightness Correction Mode Is ON
Taking images begins 25 ms
after the TRIG signal is input.
TRIG signal ON
(Brightness
OFF
Correction ON)
ON
BUSY signal
OFF
FQ2-S/CH Series User's Manual for Communications Settings (Cat. No. Z338)
Section 2 Controlling Operation and Outputting Data with a Parallel Connection
Important
If the gain is increased, the brightness will not be stable and measurement values may be inconsistent. We recom-
mend that you turn ON the Brightness Connection Mode.
FQ2-S/CH User's Manual
− [Brightness correction]
− [Brightness correction]
ON for 1 ms min.
ON while the measurement
process is being executed.
Adjusting Image Quality
67