ao:acq_system
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ao:acq_system [2018/07/07 08:31] jones [Camera Selection] |
ao:acq_system [2018/07/07 08:33] (current) jones [Acquisition System] |
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| ==== Optical Layout ==== | ==== Optical Layout ==== | ||
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| ==== Camera Selection ==== | ==== Camera Selection ==== | ||
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| - | An ideal acquisition camera should enable both fast and slow readout, with dark current lower than typical sky noise. The current acquisition camera is a camera with a BNC connector made by Watec (the 120N?). The short axis of the field of view is 5.7mm (? to confirm). An alternative camera is the (uncooled) [[http:// | + | An ideal acquisition camera should enable both fast and slow readout, with dark current lower than typical sky noise. The current acquisition camera is a camera with a BNC connector made by Watec (the 120N?). The short axis of the field of view is 5.7mm (? to confirm). An alternative camera is the (uncooled) [[http:// |
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| //Laszlo:// Currently we use Astrovid Stellacam II video cameras for both imege acquisition and for the finder. This camera looks very much like a Watec camera only a bit larger. I suspect it is made by Watec. The Astrovid uses Sony ICX418AL CCD while the DMK camera uses Sony ICX205AL CCD. Both CCDs are Type 1/2, that is 8 mm diagonally. According to the datasheets the sensitivity of the ICX418AL and ICX205AL are 1100 mV and 450 mV, respectively. The Astrovid dark signal is 1 mV while the DMK dark signal is 16 mV. Thus the Astrovid is more sensitive than the DMK. The Astrovid has an analog output and needs a frame grabber. This is not ideal. It would be nice to have digital output. The USB output of the DMK is not ideal either because we either use the WFS computer to handle the acquisition finder cameras or we need a bunch of repeaters because USB 2 is limited to 5 m cable length and the bunkers are rather 30 m away.\\ | //Laszlo:// Currently we use Astrovid Stellacam II video cameras for both imege acquisition and for the finder. This camera looks very much like a Watec camera only a bit larger. I suspect it is made by Watec. The Astrovid uses Sony ICX418AL CCD while the DMK camera uses Sony ICX205AL CCD. Both CCDs are Type 1/2, that is 8 mm diagonally. According to the datasheets the sensitivity of the ICX418AL and ICX205AL are 1100 mV and 450 mV, respectively. The Astrovid dark signal is 1 mV while the DMK dark signal is 16 mV. Thus the Astrovid is more sensitive than the DMK. The Astrovid has an analog output and needs a frame grabber. This is not ideal. It would be nice to have digital output. The USB output of the DMK is not ideal either because we either use the WFS computer to handle the acquisition finder cameras or we need a bunch of repeaters because USB 2 is limited to 5 m cable length and the bunkers are rather 30 m away.\\ | ||
ao/acq_system.1530966713.txt.gz ยท Last modified: 2018/07/07 08:31 by jones
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