Home eBooks Download › dynamic photorefractive optical memories

Dynamic Photorefractive Optical Memories

$Dynamic Photorefractive Optical Memories$
DOWNLOAD

Download Dynamic Photorefractive Optical Memories PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get Dynamic Photorefractive Optical Memories book now. This website allows unlimited access to, at the time of writing, more than 1.5 million titles, including hundreds of thousands of titles in various foreign languages. If the content not found or just blank you must refresh this page

Dynamic Photorefractive Optical Memories

$Dynamic Photorefractive Optical Memories$
DOWNLOAD
Author : CALIFORNIA UNIV SAN DIEGO LA JOLLA DEPT OF ELECTRICAL AND COMPUTER ENGINEERIN G.
language : en
Publisher:
Release Date : 1992

Dynamic Photorefractive Optical Memories written by CALIFORNIA UNIV SAN DIEGO LA JOLLA DEPT OF ELECTRICAL AND COMPUTER ENGINEERIN G. and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with categories.

The extremely large storage density of volume holographic memories is applicable to numeric and neural network optical computing. Such photorefractive memories, can be used to provide optical storage of binary bit-plane or gray scale images as well as weighted interconnects for optical digital and neural network computing. However, success in applying optical memories to computing will strongly depend not only on the memory's large capacity and short random access time, but also on the memory's dynamic characteristics. Our objective is to construct a dynamic photorefractive memory that provides (1) nondestructive readout, i.e., after a large number of readings, the memory can be refreshed by rewriting the still useful information from one crystal into another, and (2) write/erase capability, that is, while rewriting the useful part of the information from one crystal to the other, we can also replace some of the old information that must be erased by the new information introduced from the input to the memory.

A Compact Optical Associative Memory Using Dynamic Holographic Storage Media And Photorefractive Gain And Attenuation Elements

$A Compact Optical Associative Memory Using Dynamic Holographic Storage Media And Photorefractive Gain And Attenuation Elements$
DOWNLOAD
Author : Thomas Joseph Burns (CAPT, USAF.)
language : en
Publisher:
Release Date : 1990

A Compact Optical Associative Memory Using Dynamic Holographic Storage Media And Photorefractive Gain And Attenuation Elements written by Thomas Joseph Burns (CAPT, USAF.) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with Associative storage categories.

Photorefractive Optics

$Photorefractive Optics$
DOWNLOAD
Author : Shizuhuo Yin
language : en
Publisher: Academic Press
Release Date : 2000

Photorefractive Optics written by Shizuhuo Yin and has been published by Academic Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with Science categories.

"This text covers the fundamental aspects and the recent advances of photorefractive optics. There is a market potential for developing photorefractive (PR) optic devices for the needs of informational infrastructures. Photorefractive Optics provides an intensive background and details state-of-the-art technological applications for these needs. The book is a reference text for technical staff, research scientists, and graduate students who are working in the field."--BOOK JACKET

A Compact Optical Associative Memory Using Dynamic Holographic Storage Media And Photorefractive Gain And Attenuation Elements

$A Compact Optical Associative Memory Using Dynamic Holographic Storage Media And Photorefractive Gain And Attenuation Elements$
DOWNLOAD
Author : Thomas J. Burns
language : en
Publisher:
Release Date : 1990

A Compact Optical Associative Memory Using Dynamic Holographic Storage Media And Photorefractive Gain And Attenuation Elements written by Thomas J. Burns and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with categories.

This research effort implemented a compact optical associative memory architecture consisting of a Fabry-Perot Confocal Resonator (FPCR) optical processing environment, two dynamically reprogrammable Lithium Niobate volume holograms, and Barium Titanate gain and attenuation elements. The reduced physical dimensions of the compact optical processing environment make it more adaptable to military applications than previous associative memory designs. The FPCR employs Mangin mirrors designed to reduce spherical aberrations in off-axis rays. The orientation of the gain element's grating vector angle and the model used to predict the profile of the attenuation element were unique to this research effort. The object stored in the associative memory was phase encoded using a glass microscope slide etched in a 40% hydrofluoric acid solution. Beam path deviations caused by the non-parallel geometry of the photorefractive crystals were corrected with a variable pitch, plate glass optical wedge inserted in the cavity's feedback arm. Experimental results showed the system is capable of storing and fully retrieving a single object from memory when presented with partial information about the object Additional system modifications are required to store and retrieve multiple objects. Theses. (RRH).

Dynamic Photorefractive Memory And Its Application For Opto Electronic Neural Networks

$Dynamic Photorefractive Memory And Its Application For Opto Electronic Neural Networks$
DOWNLOAD
Author : Hironori Sasaki
language : en
Publisher:
Release Date : 1994

Dynamic Photorefractive Memory And Its Application For Opto Electronic Neural Networks written by Hironori Sasaki and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with categories.

The Physics And Applications Of Photorefractive Materials

$The Physics And Applications Of Photorefractive Materials$
DOWNLOAD
Author : L. Solymar
language : en
Publisher: Clarendon Press
Release Date : 1996-08-15

The Physics And Applications Of Photorefractive Materials written by L. Solymar and has been published by Clarendon Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996-08-15 with Science categories.

Photorefractive materials combine photoconductive and electro-optic properties: light affects their electrical conductivity; their optical properties (refractive index, etc.) are affected by applied electric fields. The aim of this book is to cover the vast range of phenomena occurring in Photorefractive Materials. For Physicists it is part of the fashionable subject of Nonlinear Optics. Engineers tend to place it as part of optoelectronics promising a variety of new devices. This book summarizes the results of 28 years of research in a manner that would appeal both to the beginner (a graduate student who has just entered the field) and to the expert (who might have done research on some aspect of the subject for a decade or more). It is in three parts. Part I serves as an introduction with emphasis on physical principles and simple mathematical models. Part II is a comprehensive account of all the major advances. Its main merit is the organization of the material accompanied by a detailed list of references. Part III is concerned with the enormous range of potential applications.