Operation
13
RM/TM-2040GE Series
3
Operation
3.1
Progressive Scanning
The TM-2040GE 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.
3.1.1
Preset Scan Area
TM/TMC/RM/RMC-2040GE has four fixed Scan Area Modes: full scan, centered 600 lines, centered 300 lines, and
centered 150 lines. In full scan mode, all active lines of the CCD sensor, 1600 lines, are transferred out line by
line. In centered mode 600 lines are transferred out, in 300 line and 150 line mode, only the centered lines are
transferred out line by line. The rest of the lines are dumped out using the fast dump function of the CCD. This
transfer method causes the frame rate of each mode to vary.
3.1.2
Programmable Scan Area
In Programmable Scan Area Mode, users can specify both the start point of the active scan area and the total
active lines through the serial communication commands. The area selected by users is transferred out line by
line. The rest of the lines are dumped out using the fast dump function of the CCD. The frame rate in this mode
varies according to the selected active area. When the active area starts from x row, and the active lines are y
lines, the frame rate can be calculated using the following formulas.
Содержание RM-2040GE Series
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