Polaroid CCD Camera Manuel d'utilisateur Page 31
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- Table des matières
- MARQUE LIVRES
Noté. / 5. Basé sur avis des utilisateurs
Section 4 - Camera Hardware
Page 27
software. Software developers can produce one package for the many users across the model
line instead of different packages for each of the cameras.
While the SBIG cameras have many similarities, there are also important differences
between the products. Table 4.2 below highlights the differences from a system's standpoint:
Camera
A/D
Resolution
Temperature
Regulation
Electromechanical
Shutter/Shutter
Wheel/Vane
Electronic
Shutter
ST-5C 16 bits Closed Loop Shutter Wheel 0.01 second
ST-237A 16 bits Closed Loop Shutter Wheel 0.01 second
STV 10+2 bits Closed Loop Shutter Wheel 0.001 second
ST-6 16 bits Closed Loop Vane 0.01 second
ST-7E/8E/9E/10E/1001E 16 bits Closed Loop Shutter None
Table 4.2 - System Features
How these features affect the average user are discussed in the paragraphs below:
A/D Resolution - This is a rough indication of the camera's dynamic range. Higher precision
A/D Converters are able to more finely resolve differences in light levels, or for
larger CCDs with greater full well capacities, they are able to handle larger total
charges with the same resolution.
Temperature Regulation - In an open loop system like the original ST-4 the CCD cooling is
either turned on or turned off. While this provides for adequate cooling of the
CCD, the CCD's temperature is not regulated which makes it important to take
dark frames in close proximity to the associated light frame. Closed loop
systems regulate the CCD's temperature to an accuracy of ±0.1° C making dark
frames useful over longer periods.
Electromechanical Vane - Having the vane in the ST-6 means the host software can effectively
"cover the telescope" and take dark frames remotely, without the user having to
get up and physically cover the telescope.
Electromechanical Shutter - Having the shutter in the ST-7E/8E/9E/10E/1001E gives streak-
free readout and allows taking dark frames without having to cover the
telescope. While the minimum exposure is 0.11 seconds, repeatability and area
uniformity are excellent with SBIG's unique unidirectional shutter.
Shutter Wheel - The Shutter Wheel, used in conjunction with the camera's Electronic shutter,
allows you to cover the CCD for taking dark frames and in the case of the
ST-5C/237/237A allows replacement with a mini internal color filter wheel.
Electronic Shutter - Having an electronic shutter involves having a CCD with a frame transfer
region. These CCDs actually have an array that has twice the number of rows
advertised, where the bottom half is open to the light (referred to as the Image
Area), and the top half is covered with a metalization layer (referred to as the
Storage Area). In frame transfer CCDs at the end of the exposure, the pixel data
from the Image Area is transferred into the Storage Area very rapidly where it
can be read out with a minimum of streaking.
In addition to the system level differences between the various cameras, Table 4.3 below
quantifies the differences between different CCDs used in the cameras:
- Operating Manual 1
- 1. Introduction 5
- 1.2. Quick Tour 5
- 1.2.1. CCDOPS Software 6
- 1.2.2. CCD Camera 7
- 2.1. Cameras in General 9
- 2.2. How CCD Detectors Work 9
- 2.4. CCD Special Requirements 12
- 2.4.1. Cooling 12
- 2.4.3. Dark Frames 13
- 2.4.4. Flat Field Images 14
- 2.4.5. Pixels vs. Film Grains 14
- 2.4.6. Guiding 15
- 2.5. Electronic Imaging 16
- 3.4. Focusing the CCD Camera 20
- Back Focus Distance 21
- Diffuser 21
- 3.6. Taking an Image 22
- 3.7. Displaying the Image 22
- 3.8. Processing the Image 23
- 3.9. Advanced Capabilities 23
- 3.9.3. Track and Accumulate 24
- 3.9.5. Auto Grab 25
- 3.9.6. Color Imaging 25
- 4. Camera Hardware 27
- 4.1. System Components 27
- 4.2. Connecting the Power 27
- 4.4.1 Using Mechanical Relays 28
- 0.01 second 31
- 0.001 second 31
- 4.7 Battery Operation 35
- 4.8 ST-1001E Differences 35
- 5.2. Deep Sky Imaging 37
- 5.3. Terrestrial Imaging 37
- 5.4. Taking a Good Flat Field 37
- 5.8. Tracking Functions 40
- 6.1. Cooling Booster 43
- 6.2. Tri-color Imaging 44
- 6.4. Focal Reducers 44
- 6.8. SBIG Technical Support 46
- 7. Common Problems 47
- 8. Glossary 49
- B. Appendix C - Maintenance 55
- C.1. Technique 57
Produits connexes et manuels pour Caméscopes Polaroid CCD Camera
(58 pages)
(62 pages)Sandberg 507-78 podręczniki
Instrukcje obsługi i podręczniki użytkownika dla Przewody zasilające Sandberg 507-78.
Dostarczamy 1 pdf podręczników Sandberg 507-78 do pobrania za darmo według typów dokumentów: Arkusz Danych
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