dc.contributor.author |
Saha, S. K |
|
dc.date.accessioned |
2010-01-16T15:10:33Z |
|
dc.date.available |
2010-01-16T15:10:33Z |
|
dc.date.issued |
2009 |
|
dc.identifier.citation |
P. Chakrabarti, S. Jit, A. Pandey., eds., Emerging Trends in Electronic and Photonic Devices & Systems., pp. 452 |
en |
dc.identifier.uri |
http://hdl.handle.net/2248/4989 |
|
dc.description.abstract |
Astronomical observations are dependent on focal-plane instruments, and detectors continue to play a key role. The detector technology is evolving rather fast with the large-format CMOS and CCD array mosaics, electron-multiplying CCDs, electron-avalanche photodiode arrays, quantum-well IR photon detectors etc. However, the requirements of artifact-free photon shot noise limited images are the higher sensitivity, higher quantum efficiency, reduced noise that includes dark current, read-out and amplifier noise, smaller point-spread functions and higher spectral bandwidth, etc. One of the fastest growing applications is signal sensing, particularly wavefront sensing for adaptive optics and fringe tracking for interferometry. A few detectors that are being used in astronomical imaging are discussed in this talk. |
en |
dc.language.iso |
en |
en |
dc.publisher |
Macmillan Publishers India Ltd. |
en |
dc.rights |
© Macmillan Publishers India Ltd. |
en |
dc.subject |
Astronomical Observations |
en |
dc.subject |
CMOS and CCD Array Mosaics |
en |
dc.subject |
Electron-Multiplying CCDs |
en |
dc.subject |
Electron-Avalanche Photodiode Arrays |
en |
dc.subject |
Quantum-Well IR Photon Detectors |
en |
dc.subject |
Higher Quantum Efficiency |
en |
dc.subject |
Spectral Bandwidth |
en |
dc.subject |
Signal Sensing |
en |
dc.subject |
Wavefront Sensing |
en |
dc.subject |
Adaptive Optics |
en |
dc.subject |
Fringe Tracking for Interferometry |
en |
dc.subject |
Astronomical Imaging |
en |
dc.title |
Detectors for the astronomical applications |
en |
dc.type |
Article |
en |