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66 MicroMAX System User Manual Version 6.C
Part 4 of Figure 24 illustrates the situation at the end of the readout. Both the imaging and
storage cells are empty. In Free Run operation, the imaging cells will be switched back on
immediately, allowing charge accumulation to begin. In Ext Sync operation with no
PreOpen, they are not switched back on until after the External Sync pulse is detected.
43
12
Empty Readout Register. Exposure
has ended and image is being
transferred to storage cells.
Image has been shifted to storage cells and
first line has been shifted to Readout Register.
After first image are read out, storage cells are
empty. Second exposure begins if in Freerun
mode. Otherwise, waits for Ext Sync.
A2
A1
B2
B1
A4
A3
B4
B3
A6
A5
B6
B5
C2
C1
C4
C3
C6
C5
A1 B1
C1
A2 B2
A4
A3
B4
B3
A6
A5
B6
B5
C2
C4
C3
C6
C5
Charge from first cell has been
shifted to the Output Node.
A1 B1
C1
A2 B2
A4
A3
B4
B3
A6
A5
B6
B5
C2
C4
C3
C6
C5
Figure 24. Non-Overlapped Mode Exposure and Readout
A subsection of the CCD can be read out at full resolution, sometimes increasing the
readout rate while retaining the highest resolution in the region of interest (ROI).
Readout Rate for Interline
Below are the equations that determine the rate at which the CCD is read out. Tables of
values for CCDs supported at the tim
e of the printing of this manual also appear below.
Assuming the shutter selection is None
, the time needed to take a full frame at full
resolution in non-overlapped timing mode is:
t
R
+ t
exp
(1)
where
t
R
is the CCD readout time,
t
exp
is the exposure time.