JAI operation manual Internal Shutter Speed Control TM-1020 Series

Page 21

TM-1020 Series Progressive Scan Shutter Cameras

3.6.1Internal Shutter Speed Control (TM-1020 Series)

FIGURE 9. Internal Shutter Speed Control (TM-1020 Series)

EXT. VINIT

HD

INT. VINIT with shutter speed control

Discharge

Exposure time set by shutter speed

Transfer Gate

FDV

41H

Analog Video Sync

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.

3.6.2External 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.

Operation