ATIK Cameras 4 Series 사용자 설명서 - 페이지 6

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3.3

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

please note 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, providing 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 observing 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, but 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.

3.8

Replacing the desiccant

Your camera includes a high-performance molecular sieve desiccant tablet

which is used to avoid condensation in the CCD chamber. Although this

desiccant will last a long time it may eventually need replacement or

recharging, in which case please follow the instructions below:

To replace the desiccant, open the desiccant port with the supplied

plastic interface and a screwdriver, take out the used tablet and replace

it with a fresh one. Replace the port cover and tighten (no need to over-

tighten). Wait 24 hours before connecting the camera again.

mains power adaptor,