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Interface
Telescope
Interface
Parallel Interface
As you can see from Figure 2.2, the ST-7E, ST-8E, ST-9E, ST-10E and ST-1001E are completely
self contained. Unlike our previous products, the ST-7E, ST-8E, ST-9E, ST-10E and ST-1001E
contain all the electronics in the optical head. There is no external CPU like the ST-5C, ST-237,
ST-6 and STV.
At the "front end" of any CCD camera is the CCD sensor itself. As we have already
learned, CCDs are a solid state image sensor organized in a rectangular array of regularly
spaced rows and columns. The ST-7E, ST-8E, ST-9E and ST-10E use two CCDs, one for
imaging (Kodak KAF series) and one for tracking (TI TC211, like the ST-4/4X). Table 2.1 below
lists some interesting aspects of the CCDs used in the various SBIG cameras.
Camera
Tracking CCD
ST-5C
ST-237
STV
ST-6
ST-7E
ST-8E
ST-9E
ST-10E
ST-1001E
Section 2 - Introduction to CCD Cameras
Micro-
controller
PC
16 Bit
A/D
Desktop
Power
Supply
Figure 2.2 - CCD System Block Diagram
Array
CCD
Dimensions
TC211
2.6 x 2.6 mm
TC255
3.2 x 2.4 mm
TC237
4.7 x 3.6 mm
TC237
4.7 x 3.0 mm
TC241
8.6 x 6.5 mm
KAF0401E 6.9 x 4.6 mm
KAF1602E 13.8 x 9.2 mm
KAF0261E 10.2 x 10.2 mm
KAF3200E 14.9 x 10.0 mm
KAF1001E 24.6 x 24.6 mm
Table 2.1 - Camera CCD Configurations
Page 7
TE Cooler
Tracking CCD
Clock
Drivers
Preamp
Shutter
Host Computer
Number of
Pixels
192 x 164
320 x 240
640 x 480
320 x 200
375 x 242
765 x 510
1530 x 1020
512 x 512
2184 x 1472
1024 x 1024
Imaging CCD
Pixel Sizes
13.75 x 16 µ
10 x 10 µ
7.4 x 7.4 µ
14.8 x 14.8 µ
23 x 27 µ
9 x 9 µ
9 x 9 µ
20 x 20 µ
6.8 x 6.8 µ
24 x 24 µ
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