6-1 Holographic Memories and its Applications
نویسندگان
چکیده
منابع مشابه
Glucose-Sensitive Holographic (Bio)Sensors: Fundamentals and Applications
Nowadays sensors and especially biosensors play an important role in medical diagnosis and detection of food and environment contaminations. Biosensors’ facilities have been improved significantly by using technologies such as surface plasmon resonance, microfluidics, laser, and electrochemistry. These technologies are now available on chips in micro- and nano-scale and are capable of mea...
متن کاملSignal Modulation for Holographic Memories
Holographic memories use a photosensitive medium to record the optical interference pattern of a reference beam and a signal beam as a volumetric refractive index distribution. The modulation method used to impart the digital information onto the signal beam can greatly impact the efficiency and uniformity of media consumption, crosstalk among the recorded data, and ultimately, the storage capa...
متن کاملMedium consumption in holographic memories.
The dynamic range of holographic storage media is traditionally characterized in terms of M/#. However, this is a system parameter that assumes simple, uniform plane-wave holograms. Realistic architectures violate this assumption so that M/# measured with plane waves cannot be used to predict system diffraction efficiency. Thus, there currently is no systematic method predicting signal strength...
متن کاملHolographic characteristics of a 1-mm-thick photopolymer to be used in holographic memories.
Poly(vinyl alcohol-acrylamide) photopolymers are materials of interest in the field of digital information storage (holographic memories). We analyzed the behavior of a 1-mm-thick photopolymer. Using a standard holographic setup, we recorded unslanted diffraction gratings. The material has high angular selectivity (0.4 degrees), good sensitivity (88 mJ/cm2), and small losses caused by absorptio...
متن کاملCross talk in phase-coded holographic memories
Received June 14, 1993; revised manuscript received July 27, 1993; accepted August 2, 1993 The cross talk between holograms multiplexed with Walsh-Hadamard phase codes is analyzed. Each hologram is stored with a reference beam that consists of N phase-coded plane waves. The signal-to-noise ratio (SNR) is calculated for a recording schedule for which the center of each stored image coincides wit...
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ژورنال
عنوان ژورنال: The Journal of the Institute of Television Engineers of Japan
سال: 1973
ISSN: 1884-9644
DOI: 10.3169/itej1954.27.883