High Resolution Imaging: Detectors and Applications free ebook download.

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High Resolution Imaging: Detectors and Applications free ebook download

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Astronomy and Cosmology

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Author(s):	Swapan K. Saha

Date:	2015	Format:	PDF	Language:	English	ISBN/ASIN:	9814613274
Pages:	1	OCR:		Quality:		ISBN13:
Uploader:	alex21s	Upload Date:	4/21/2020 10:43:00 PM

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Interferometric observations need snapshots of very high time resolution of the order of (i) frame integration of about 100 Hz or (ii) photon-recording rates of several megahertz (MHz). Detectors play a key role in astronomical observations, and since the explanation of the photoelectric effect by Albert Einstein, the technology has evolved rather fast. The present-day technology has made it possible to develop large-format complementary metal oxidesemiconductor (CMOS) and charge-coupled device (CCD) array mosaics, orthogonal transfer CCDs, electron-multiplication CCDs, electron-avalanche photodiode arrays, and quantum-well infrared (IR) photon detectors. The requirements to develop artifact-free photon shot noise-limited images are higher sensitivity and quantum efficiency, reduced noise that includes dark current, read-out and amplifier noise, smaller point-spread functions, and higher spectral bandwidth. This book aims to address such systems, technologies and design, evaluation and calibration, control electronics, scientific applications, and results.

One of the fastest growing applications is signal sensing, especially wavefront sensing for adaptive optics and fringe tracking for interferometry, which is important for long-baseline optical interferometry. The coherence time of the atmosphere is a highly variable parameter. Depending upon the high velocity wind, it varies from <1 ms to 0.1 s. The exposure times are to be selected accordingly, to maximize the signal-to-noise ratio, as well as to freeze the fringe pattern. A large-format photon-counting system, which is an essential tool in the application of optical interferometric imaging, allows accurate photon centroiding and provides the dynamic range needed for measurements of source characteristics. The advent of high-quantum efficiency photon-counting systems vastly increases the sensitivity of high-resolution imaging techniques. Such systems raise the hope of making diffraction-limited images of objects as faint as ~1516 m_v (visual magnitude).

This book deals with the fundamentals of the important aspects of high-resolution imaging, such as electromagnetic radiations, particularly, optical wavelengths and their distortions due to optical elements and Earths atmosphere while passing through a detector  semiconductor physics  lasers  fiber optics  photon-detection process  photodetectors  charge-transfer devices  photon-counting devices in visible wavelength  radiation detectors in infrared wavelengths  and detecting systems for high energies.

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	Title	Link	Password	Size (MB)	Thank to	Inform Admin
2760538	Book	https://tezfiles.com/file/54cc76cb17d23...		17.00	alex21s

Tags: Applications Detectors High Imaging Resolution

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