Polaroid CCD Camera Manual Do Utilizador

Camera

CCD Used Number of

Pixels

Pixel

Dims.

Array

Dimension

Read

Noise

Full Well

Capacity

Tracking

CCD

TC-211

192 x 164

13.75 x 16 µ

2.6 x 2.6mm

12e

-

 rms 150Ke

-

ST-5C

TC-255

320 x 240

10 x 10 µ

3.2 x 2.4mm

20e

-

 rms 50Ke

-

ST-237A TC-237

657 x 495

7.4 x 7.4 µ

4.7 x 3.6mm

15e

-

 rms 20Ke

-

STV

TC-237

320 x 200

14.8 x 14.8 µ 4.7 x 3.0mm

17e

-

 rms 20Ke-

ST-6

TC-241

375 x 242

23 x 27 µ

8.8 x 6.6mm

30e

-

 rms 400Ke

-

ST-7E

KAF0401E 765 x 510

9 x 9 µ

6.9 x 4.6mm

15e- rms 50Ke

-

/100Ke

-

5

ST-8E

KAF1602E 1530 x 1020 9 x 9 µ

13.8 x 9.2mm

15e- rms 50Ke

-

/100Ke

-

4

ST-9E

KAF0261E 512 x 512

20 x 20 µ

10.2 x 10.2mm 13e- rms 180Ke-

ST-10E

KAF3200E 2184 x 1472 6.8 x 6.8 µ

14.9 x 10.0mm 11e- rms 77Ke-

ST-1001E KAF1001E 1024 x 1024 24 x 24 µ

24.6 x 24.6 mm 16e- rms 180Ke-

How these various specifications affect the average user is described in the following
paragraphs:
Number of Pixels - The number of pixels in the CCD affects the resolution of the final images.

The highest resolution device is best but it does not come without cost.  Larger

CCDs cost more money and drive the system costs up.  They are harder to cool,

require more memory to store images, take longer to readout, etc.  With typical

PC and Macintosh computer graphics resolutions, the CCDs used in the SBIG

cameras offer a good trade off between cost and resolution, matching the

computer's capabilities well.

Pixel Dimensions - The size of the individual pixels themselves really plays into the user's

selection of the system focal length.  Smaller pixels and smaller CCDs require

shorter focal length telescopes to give the same field of view that larger CCDs

have with longer focal length telescopes.  Smaller pixels can give images with

higher spatial resolution up to a point.  When the pixel dimensions (in

arcseconds of field of view) get smaller than roughly half the seeing, decreasing

the pixel size is essentially throwing away resolution.  Another aspect of small

pixels is that they have smaller full well capacities.

For your reference, if you want to determine the field of view for a pixel

or entire CCD sensor you can use the following formula:

Field of view (arcseconds) =  

8.12x size (µm)

focal length (inches) 

Field of view (arcseconds) =  

20.6x size(um)

focal length (cm)

where size is the pixel dimension or CCD dimension in millimeters and the focal

                                                  

5

The Kodak CCDs (KAF0400 and KAF1600) are available with or without Antiblooming Protection.

Units with the Antiblooming Protection have one-half the full well capacity of the units without it.