Specifications

30 • C4-1280-GigE Camera Hardware Reference Manual Rev. 1.8
Non-Destructive Readout (NDR) Mode
With the NDR mode it is possible to readout of up to 4 images at
different integration levels during one exposure period. The
principle is comparable to multiple scans with different integration
times with the advantage of taking all data during one single
integration period. It allows the combination of profile data from
different integration levels and it ensures accurate profile data
even for difficult surfaces with strong changes in reflectance.
The following timing diagram shows the function of NDR with 2 frames, when subsequent sensor
images are acquired. The exposure times for NDR frame 1 and 2 are depicted with It1 and It2
respectively. Please note that the readout of the second frame R2 can not begin unless the first frame
R1 has been readout. The same applies also between two subsequent sensor images, i.e. the first NDR
frame of sensor image 2 can not be readout unless the last NDR frame of sensor image 1 has been
readout.
It2
It1
R1(1)
R2(1)
R1(2)
R2(2)
I(1)
It2
It1
I(2)
Trigger Sensor
Image 1
Readout NDR
Frame 1 of
Sensor Image 1
Readout NDR
Frame 2 of
Sensor Image 1
Trigger Sensor
Image 2
Readout NDR
Frame 1 of
Sensor Image 2
Readout NDR
Frame 2 of
Sensor Image 2