ATIK Cameras 4 Series Panduan Pengguna - Halaman 6
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Halaman Cetak3.3 Optical Window
The optical window used in front of the CCD is a BK7 with BBAR coatings on both sides
ensuring that no reflection will appear in your image.
3.4 Analog to Digital Converter (ADC)
The Analog to Digital Converter (ADC) is a 16-bit ADC. This means that your Atik
camera will allow you to record subtle levels of gray, providing you with enhanced
dynamic range when capturing an image.
3.5 Power Consumption
Your Atik camera was designed to have low power consumption: please see the table
in section 4 for details specific to your camera model. The 2.1mm centre-positive DC
input is compatible with a wide range of 12V DC supplies.
WARNING: If you have purchased the optional
that it is for indoor or observatory use only. There is a risk of electric shock if the adaptor is
used in damp environments or outside. If in doubt, do not use the adaptor and consult a
trained electrician.
3.6 USB Port
The Atik Series 4 cameras use a USB 2.0 high-speed interface, allowing full- frame
image downloads in only a few seconds. A higher speed "preview" mode is also
present, which provides roughly twice the speed.
3.7 Cooling
All Series 4 cameras have a robust, regulated cooling system, meaning that the CCD is
kept at the desired temperature throughout the imaging session. The very low readout
noise, combined with efficient cooling, means that dark frames are not necessary in
most situations, allowing you to spend more time imaging and less time taking
calibration frames. If very long exposures are to be used or high precision data is
required (exo-planet searches, for example), dark frame libraries will be easy to
maintain.
The cooling delta varies between models and full specifications are available in the
Technical Information Summary on page 7. Please note: the cooling delta is how far
below the ambient temperature the camera can achieve, rather than a fixed
temperature it will cool to.
After switching on the camera, it is advisable to allow up to 5 minutes before
taking images in order to allow the temperature to stablilize.
mains power adaptor, please note
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