Basic Operation and Features
3-10
Basler A400k
DRAFT
To effectively use the flash exposure, the guidelines below must be observed:
• The flash must occur while the flash window is open, that is, the flash trigger signal is high.
• The exposure time setting on the camera and the duration of the flash must be equal to or
higher than the minimum flash exposure time required. The minimum flash exposure time
required is calculated using the below formula:
Minimum flash exposure = 4.56 µs x (AOI Height - 1) + T
Flash
where T
Flash
is the time it takes to trigger the flash
Examples:
(A) The height of the area of interest (AOI) is 1726 lines (full resolution):
Minimum flash exposure = 4.56 µs x (1726 - 1) + Exposure time = 7866 µs + T
Flash
(B) The height of the area of interest (AOI) is only 200 lines:
Minimum flash exposure = 4.56 µs x (200 - 1) + Exposure time = 907.4 µs + T
Flash
• The light intensity of the flash must be considerably higher than the light intensity in the
scene when no flash is present.
• Exposure of the next frame can be started while the previous frame is still being read out.
Figure 3-9: Flash Window
L
If the exposure time setting on the camera is lower than the minimum flash ex-
posure time required, no flash trigger signal will be output.
Содержание A400K
Страница 1: ...Basler A400k USER S MANUAL Document Number DA00062410 Release Date 27 September 2007 ...
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Страница 26: ...Camera Interface 2 10 Basler A400k DRAFT Figure 2 6 A403k Camera Frame Grabber Interface ...
Страница 27: ...Camera Interface Basler A400k 2 11 DRAFT Figure 2 7 A404k Camera Frame Grabber Interface ...
Страница 52: ...Camera Interface 2 36 Basler A400k DRAFT ...
Страница 154: ...Configuring the Camera 4 54 Basler A400k DRAFT ...
Страница 168: ...Troubleshooting 6 10 Basler A400k DRAFT ...
Страница 172: ...Feedback iv Basler A400k DRAFT ...
Страница 176: ...Index viii Basler A400k DRAFT ...