Physics – Optics
Scientific paper
Jul 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998spie.3355..777h&link_type=abstract
Proc. SPIE Vol. 3355, p. 777-785, Optical Astronomical Instrumentation, Sandro D'Odorico; Ed.
Physics
Optics
4
Scientific paper
A design for a new-concept speckle imaging system is presented. The instrument, now under construction at Rochester Institute of Technology (RIT), will be able to use any large- format scientific-grade CCD as the imager. The high quantum efficiency, low noise, and linear response of current CCDs are attractive characteristics when compared with traditional photon-counting speckle imaging systems. The RIT system consists of an optics package, placed between the telescope and the imager, that contains a piezoelectric tip-tilt mirror capable of executing a timed sequence of movements to place many speckle patterns over the active area of the CCD. The system will either (a) place a series of speckle images in a row and then use the CCD electronics to periodically shift charge toward the serial register or, if the CCD electronics do not allow, (b) have the mirror perform a serpentine step- and-scan motion over the entire CCD. When the entire CCD is full of speckle images, the chip is read out as normal. This kind of 'burst mode' speckle data collection effectively uses the large area of the CCD as a memory cache of speckle data frames, allowing large format scientific-grade CCDs that already exist at many observatories to be used efficiently and inexpensively in speckle imaging. The expected performance of the system, which is dependent on the CCD imager, is discussed. CCD speckle observations at the WIYN* 3.5-m telescope and simulation results indicate that, when used with a very low noise CCD, this system could obtain speckle data that are superior to those of even the best photon-counting cameras at the fainter magnitudes where such cameras are currently used.
Horch Elliott P.
Ninkov Zoran
van Altena William F.
No associations
LandOfFree
New low-noise high-quantum-efficiency speckle imaging system does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with New low-noise high-quantum-efficiency speckle imaging system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and New low-noise high-quantum-efficiency speckle imaging system will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1176391