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TM-1020 Series Progressive Scan Shutter Cameras
3.2 Camera Rear Panel (CL Versions)
CAMERA LINK
POWER BNC
3.2.1Digital Output Connector
Refer to Section 2.2.6 on page 12 for information on digital output connectors.
3.2.2Analog Output Connector
The CL-version camera has a BNC connector on the rear panel to output analog video data.
3.2.3Power and External Sync Connector
Refer to Section 2.2.2 (b on page 7 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-1020 series 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.
