NED
SU2020/SU2025
UME-0021-03
32
4.7.2 External Trigger (ExTrg) Exposure Mode
In external trigger exposure mode
(Trigger Edge)
, the exposure time is determined
by the setting made through serial communication. Each exposure starts with the
rising edge and the line period is determined by the time from rising edge to rising
edge of the trigger pulse. Timing relationship of each signal is as follows.
valid data ２０４８ pixeles
invalid data（０）
invalid data（０）
≧２ＣＫ
≧２２００ＣＫ
２０５２ＣＫ
ＸＣｌｋ
（２０Ｍ
２５Ｍ）
ＤＶＡＬ
ＶIＤＥＯ
ＣＣ１
２０４８ＣＫ
ＬＶＡＬ
７9ＣＫ
≧１ＣＫ
２ＣＫ
２ＣＫ
Figure 4-7-2-1 External Trigger (Trigger Edge) Exposure Mode
4.8
Setting Offset
In the figure below, the horizontal axis indicates the amount of incident light and
the vertical axis indicates the output. Fs shows the output at saturation. Dd shows
the output at darkness. (Both Fs and Dd are digital.) Se shows the saturation
current, or the amount of exposure when the output saturates.
Figure 4-8-1 Saturation Exposure and Dark Current Output
Ｄｄ
Ｆｓ
Ｓｅ
Amount of Incident
Light (lx
・
s)
Output
Fs : Saturation Output
Dd : Dark Current
Se : Saturation Exposure
