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Page 16
Operation
TM-1400 Series Progressive Scan Shutter Cameras
3.2 Camera Rear Panel (CL Versions)
3.2.1 Digital Output Connector
Refer to Section 2.2.2 (d on page 8 for Camera Link information.
3.2.2 Analog Output Connector
The TM-1400CL camera has a BNC connector on the rear panel to output analog video data.
3.2.3 Power and External Sync Connector
Refer to Table 2 on page 6 for information on the power and external sync. connectors.
3.3 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. Therefore, 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-1400 uses a state-of-the-art progressive scanning interline transfer CCD which scans all lines
sequentially from top to bottom at one frame rate (30Hz). Like a non-interlace computer screen, it
generates a stable, crisp image without alternating lines and provides full vertical TV resolution of 1040
lines (a normal TV monitor display may not be able to show images due to monitor 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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