KAI-1020 Datasheet, PDF (28/63 Pages) ON Semiconductor – Interline CCD Image Sensor

KAI−1020
Binning and Interlaced Modes
Binning is a readout mode of progressive scan CCD image
sensors where more than one row at a time is clocked into the
HCCD before reading out the HCCD. This timing mode
t_P
t_VCCD
t_VCCD
sums two or more rows together. It increases the frame rate
because there are fewer total rows to read out of the HCCD.
The following timing diagram shows how two rows are
summed together:
t_VCCD
t_VCCD
5
fH1S
0
5
fH2S
0
5
fV1
0
5
fV2A
0
5
fV2B
0
5
fFD
0
Figure 27. Binning Line Timing
When binning two rows together only 504 rows need to be
read out of the HCCD instead of the normal 1008 rows.
The HCCD will hold up to two VCCD rows of full signal
without blooming. Binning more than two rows may cause
horizontal blooming for saturated signal levels.
Interlaced readout is a form of binning. To read out the
even field use binning to sum together rows 0+1,
rows 2+3, ... rows 1006+1007. To read out the odd field use
binning to read out rows 0+1+2, rows 3+4, rows 5+6, ....
rows 1005+1006, rows 1007+1008. The odd field may also
be read out as row 0, rows 1+2, rows 3+4, ....
rows 1005+1006. See the Interlaced – Field Integration
section for an example of interlaced timing.
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