Filter
Top Products
Chapter 5 Operation 67
The readout time is approximately given by:
t
R
= [N
x
· N
y
· (t
sr
+ t
v
)] + (N
x
· t
i
) (2)
where
N
x
is the smaller dimension of the CCD
N
y
is the larger dimension of the CCD.
t
sr
is the time needed to shift one pixel out of the shift register
t
v
is the time needed to digitize a pixel
t
i
is the time needed to shift one line into the shift register
CCD Array 1 MHz Readout
MicroMAX:782Y Sony ICX075
782 x 582
0.5 sec. for full frame
MicroMAX:782YHS
Sony ICX075 782 x 582
N/A
MicroMAX:1300Y Sony ICX061
1300x1030
1.43 sec. for full frame
MicroMAX:1300YHS
Sony ICX061 1300x1030
N/A
Table 8. Approximate Readout Time for the Interline CCD Arrays
The readout rate in frames per second for the PI 1300 × 1030 interline array running at
1 MHz is shown in
Table 9.
Region of Interest Size
Binning
1300 × 1030 400 × 400 200 × 200 100 × 100
1 × 1
0.7 2.6 5.4 9
2 x 2
1.9 5.4 9 14
3 × 3
3.2 7.5 12 17
4 × 4
4.3 9 14 19
Table 9. Readout Rates for PI 1300 × 1030 Array at 1 MHz
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).
Binning
Binning is the process of adding the data from adjacent pixels together to form a single
pixel (sometimes called a super pixel), and it can be accomplished in either hardware or
software. Rectangular groups of pixels of any size may be binned together, subject to
some hardware and software limitations.