JAI TM-1020 - Manual (Page 31)

Page 21
TM-1020 Series Progressive Scan Shutter Cameras
Operation
3.6.1 Internal Shutter Speed Control (TM-1020 Series)
FIGURE 9. Internal Shutter Speed Control (TM-1020 Series)
The video signal starts with internal VINIT. The camera operates the reset and shutter in the same way
as the external pulse width control mode. When the external VINIT pulse is applied, internal VINIT is
latched to HD and the internal VINIT is delayed to set up the shutter speed period. The shutter speed is
controlled by the dial switch from “1” to “8.” Video output timing starts right after the internal VINIT
and single shots, FDV is output at the internal VINIT timing.
3.6.2 External VINIT With Pulse Width No-Delay Shutter and ROI (Read-Out
Inhibit) (Except TM-1020-15 LVDS)
For multiple-camera applications such as 2D or 3D measurement and multi-angle inspection,
simultaneous image capturing at an exact shutter timing for all cameras is critical requirement. The TM-
1020 CL’s asynchronous pulse-width control mode provides no-delay shutter as standard. Regardless of
the internal pulse timing, the camera discharges at the VINIT leading edge and transfers charges at the
trailing edge of the pulse. Even though each camera runs with slightly different H and data clock
timing, the image capturing is exactly simultaneous.
EXT. VINIT
HD
INT. VINIT with shutter speed control
Discharge
Transfer Gate
FDV
Analog Video Sync
Exposure time set by shutter speed
41H