SIGMA LBA-708 - Manual (Page 121)

5.1.3.7 CCD Frame and Interline Transfer Cameras, Non-interlaced (Progressive scan)
These camera types can produce 1x high-resolution images. The video output from each laser
pulse will occur during the next frame outputting immediately after the laser trigger arrives.
5.1.3.8 CMOS, CID Line Transfer and Tube Cameras, Non-Interlaced (Progressive scan)
These camera types can produce 1x high-resolution images. Leave the Trigger Delay box
disabled for all of these camera types.
5.1.4 Type Trigger In
The Trigger In mode will not operate correctly with X/Y Scan, Line Scan , and Tube cameras.
These include CID style cameras and almost all CMOS cameras. Use only CCD Frame and Interline
transfer style cameras. In the following discussions, it is assumed that the laser is fired simultaneous
with the arrival of the trigger pulse.
5.1.4.1 CCD Frame Transfer Camera, Interlaced
These camera types can only capture a laser pulse in one field. Therefore 2x is the highest
resolution possible with pulsed lasers. The video output from each laser pulse will occur during
the field outputting immediately after the laser trigger arrives. Since the laser is not
synchronized with the camera, this means that the pulse can occur in either field. As a result you
will observe a field hopping effect in the displayed image.
5.1.4.2 CCD Interline and Full Frame Transfer Camera, Interlaced
These camera types can capture a laser pulse in both fields at the same time. Therefore 1x high
resolution images are possible with pulsed lasers. The video output from each laser pulse will
occur during the next two fields outputting immediately after the laser trigger arrives.
5.1.4.3 CCD Frame and Interline Transfer Cameras, Non-Interlaced (Progressive scan)
These camera types can produce 1x high resolution images. The video output from each laser
pulse will occur during the next frame outputting immediately after the laser trigger arrives.
5.1.5 Type Video Trigger
The Video Trigger mode is designed to be used with lasers that cannot be externally triggered, nor
can they provide an external trigger output to the LBA. Since this mode is so easy to use and requires
no connection between the laser and the LBA, it has become the method of choice for almost all
pulsed laser applications.
When you select the Video Trigger mode a Video Trigger Level menu item will become active.
You must program the Video Trigger Level to the raw pixel threshold value that will be used to
detect the presence of the laser pulse. The choices are shown in counts and represent 1/16, 1/8, ¼
Operator’s Manual LBA-PC
Doc. No. 10654-001, Rev 4.10
121