Pulnix TM-1300 Manual de Instruções descarregar pdf (Página 18)

Page 10

Operation

TM-4000CL Series Progressive Scan Shutter Cameras

3 Operation

3.1 Camera Rear Panel

3.1.1 Digital I/O Connector (Camera Link)

Refer to Section 2.2.3 on page 6 for information on digital output connectors.

3.1.2 Analog Output Connector

The camera has a BNC connector on the rear panel to output analog video signal.

3.1.3 Power and External Sync Connector

Refer to Section 2.2.2 (b on page 5 for information on the power and external sync. connectors.

3.2 Progressive Scanning

Standard TV-system scanning is 525 lines interlace scanning as specified in the RS-170 protocol. Every

other horizontal line (odd lines and even lines) is scanned at a 60Hz rate per field, and the scanning is

completed with two fields (one frame) at 30Hz rate. Because of the interlace scanning, the vertical

resolution of CCD cameras is limited at 350 TV lines, regardless of the horizontal resolution. When

electronic shutter is applied, the CCD can hold only one field of charge at each exposure. This means

that the vertical resolution of the electronic-shutter camera is only 244 TV lines. The situation is the

same for an HDTV-format camera, since it has interlaced scanning and the vertical resolution of the

shuttered image is 500 lines.

The TM-4000CL uses a state-of-the-art progressive scanning interline transfer CCD which scans all

lines sequentially from top to bottom at one frame rate. Like a non-interlace computer screen, it

generates a stable, crisp image without alternating lines and provides full vertical TV resolution of 1000

lines (a normal TV monitor display may not be able to show 1000 lines due to monitor resolution of

30Hz scanning).

The interline transfer architecture is also important to generate simultaneous shuttering. This is different

from full frame transfer architecture which requires a mechanical shutter or strobe light in order to

freeze the object motion.

CAMERA LINK

POWER VIDEO

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Pulnix TM-1300 Manual de Instruções Página 18