Pulnix TM-1300 Instrukcja Obsługi Pobierz pdf (Strona 21)

Page 13

Operation

TM-4000CL Series Progressive Scan Shutter Cameras

3.5.2 External VINIT With Pulse Width No-Delay Shutter and ROI (Read-out

Inhibit) (TM-4000CL)

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 a critical requirement. The

TM-4000CL’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.

FIGURE 4. No-Delay Shutter

The TM-4000CL camera also has read-out-inhibit control (ROI) to control the vertical clock start

(Async Shutter #9). When ROI is low, V-clock is stopped and the transferred charges remain in the

vertical shift registers, which work like CCD memory. When the ROI is high, it clocks out the CCD

data. This helps a single frame grabber process multiple images in pipeline processing (sequential

process).

Note: When the ROI function is not used, make sure that the INTEG/ROI CCL input is kept logic

high during Async. pulse width control mode.

EXT. VINIT (Pulse width control)

INT. VINIT after trailing edge of EXT. VINIT

Discharge

Transfer Gate

FDV

Analog Video Sync

Exposure time set by pulse width

32H

Vsync

Strobe

1 2 ... 16 17 18 19 20 21 22 23 24 25 26 ... 39 40

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