Download or read book Research of Techniques for Light Modulation Detection Part I Amplitude Demodulators written by B. J. McMurtry and published by . This book was released on 1964 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: The results of a one-year applied research program on the demodulation of amplitude-modulated (AM) light are presented. Sufficient information is provided for the detailed understanding, design, and use of traveling-wave microwave phototubes (TWPs), the most promising detector for broadband-modulated light. The report includes: (1) the idealized analysis which first pointed out the more important TWP design considerations and operating characteristics; (2) a more complete computeraided analysis which gives detailed information on the effects of the various beam-circuit parameters and operating conditions; and (3) an analysis of the electron gun region, with emphasis on velocity spread and current density effects. The results of a detailed experimental analysis of the TWP are presented, providing both verification of the more complete theoretical treatment and information on generally-useful photodetector test techniques. Experimental data are given on several other types of photodetectors. A discussion of the design and construction of TWPs with S-1 photocathodes contains material of practical importance to TWP builders.

Download or read book Research on Techniques for Light Modulation Detection Part Ii Frequency Demodulators written by E. O. Ammann and published by . This book was released on 1964 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: The results of a one-year program on the demodulation of frequency-modulated (FM) or phase-modulated (PM) light are presented. Theoretical and experimental studies were made both of direct demodulation and heterodyne demodulation. A technique employing conversion of FM to AM via a birefringent device with subsequent detection by a traveling-wave phototube is used for the demodulation method. The report deals with techniques and devices for converting FM (and PM) to AM at optical frequencies. Comprehensive analyses and discussions are given on two simple birefringent devices, the birefringent discriminator and the optical ratio detector, devices capable of converting FM to AM and PM to AM, respectively. The use of multicrystal devices in demodulators is treated. Included are two optical network synthesis techniques for realizing birefringent devices having arbitrarily specified transfer functions. The conclusions reached in this program are stated, and the major contributions are summarized.

Download or read book U S Government Research Reports written by and published by . This book was released on 1964 with total page 1306 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book U S Government Research Reports written by and published by . This book was released on 1964 with total page 1586 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Study of Light Modulation and Scanning Techniques for Application to Simulation Display Generation written by W. L. Foley and published by . This book was released on 1966 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: Various techniques for modulation and scanning of coherent light are analyzed for application to the generation of high resolution high contrast displays for simulation. A number of possible techniques are discussed in the main body of the report. The individual discussions include a brief description of the princeiples of operation together with capabilities relative to bandwidth, contrast ratio, deflection angle, alignment, sensitivity, ease of fabrication, and handling. This is based somewhat upon voltage and power requirements over range of operation. (Author)

Download or read book Research on Techniques for Light Modulation Detection written by and published by . This book was released on 1964 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report covers the seventh quarter of an applied research program conducted by the Sylvania Microwave Device Division to establish techiques for light modulation detection. New results are described in the following two areas: (1) In IER No. 6, two synthesis techniques (termed I and II) for realizing an arbitrary optical transfer function were described. Synthesis procedure no. I yields a filter containing n birefringent crystals, n bias units, and n + l polarizers, while synthesis procedure no. II gives a filter containing n birefringent crystals and two polarizers. IER No. 7 describes an important improvement in synthesis procedure no. I which allows us to maximize the filter output. (2) A proposed technique is presented for modifying the birefringent discrimnator so that it can accommodate light of an arbitrary polarization. (Author).

Download or read book Demodulation of Frequency Or Space Modulated Light written by Stanford University. Stanford Electronics Laboratories and published by . This book was released on 1965 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: The generation and detection of a light beam which is deflected back and forth at a microwave rate in accordance with frequency modulation on the beam is considered. Deflection was achieved by sending the frequency modulated light through a dispersing element. The detection system consisted of a photocathode which emitted a transversely modulated electron beam into a transverse-field interaction circuit. General analyses were developed for the dispersion and electron beam-circuit interaction systems. The applicability of the instantaneous-frequency viewpoint was explored in detail, and a new condition for the validity of this viewpoint was derived. Phototube design procedures were formulated. Experiments demonstrated the dispersion and interaction mechanisms, including an unforeseen effect involving partial interception of the deflected light beam. The experiments supported the detailed theoretical analyses. An examination of the basic noise limitation revealed a significant advantage over certain other FM light detection systems. As optical modulation techniques improve, it is expected that this approach may represent a superior means of detection in optical communications systems. (Author).

Download or read book OTS Selective Bibliography written by United States. Dept. of Commerce. Office of Technical Services and published by . This book was released on with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bibliography of Scientific and Industrial Reports written by and published by . This book was released on 1970 with total page 1424 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Design and Construction of Amplitude Modulation Demodulators written by Jeffrey Robert Schenck and published by . This book was released on 1997 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Applied Research on Techniques for Light Modulation Detection written by S. E. Sobottka and published by . This book was released on 1962 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt: Research was conducted on the development of a high-sensitivity microwave phototube. Fabrication of efficient photocathodes and the development of a convergent electron gun was emphasized. Efforts were devoted to preliminary design and preparation. Items designed were deposition tubes for forming photocathodes, a convergent gun beam tester, a complete microwave phototube, and a modulated-light test bench. Apparatus constructed includes light transmission measurement apparatus for monitoring cathode film thicknesses, and vacuum station apparatus for cathode fabrication. (Author).

Download or read book Atomic Force Microscopy for Energy Research written by Cai Shen and published by CRC Press. This book was released on 2022-04-26 with total page 457 pages. Available in PDF, EPUB and Kindle. Book excerpt: Atomic force microscopy (AFM) can be used to analyze and measure the physical properties of all kinds of materials at nanoscale in the atmosphere, liquid phase, and ultra-high vacuum environment. It has become an important tool for nanoscience research. In this book, the basic principles of functional AFM techniques and their applications in energy materials—such as lithium-ion batteries, solar cells, and other energy-related materials—are addressed. FEATURES First book to focus on application of AFM for energy research Details the use of advanced AFM and addresses many types of functional AFM tools Enables readers to operate an AFM instrument successfully and to understand the data obtained Covers new achievements in AFM instruments, including electrochemical strain microscopy, and how AFM is being combined with other new methods such as infrared (IR) spectroscopy With its substantial content and logical structure, Atomic Force Microscopy for Energy Research is a valuable reference for researchers in materials science, chemistry, and physics who are working with AFM or planning to use it in their own fields of research, especially energy research.

Download or read book Biophysical Techniques in Photosynthesis written by J. Amesz and published by Springer Science & Business Media. This book was released on 2006-04-11 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt: Progress in photosynthesis research is strongly dependent on instrumentation. It is therefore not surpr- ing that the impressive advances that have been made in recent decades are paralleled by equally impressive advances in sensitivity and sophistication of physical equipment and methods. This trend started already shortly after the war, in work by pioneers like Lou Duysens, the late Stacy French, Britton Chance, Horst Witt, George Feher and others, but it really gained momentum in the seventies and especially the eighties when pulsed lasers, pulsed EPR spectrometers and solid-state electronics acquired a more and more prominent role on the scene of scientific research. This book is different from most others because it focuses on the techniques rather than on the scientific questions involved. Its purpose is three-fold, and this purpose is reflected in each chapter: (i) to give the reader sufficient insight in the basic principles of a method to understand its applications (ii) to give information on the practical aspects of the method and (iii) to discuss some of the results obtained in photosynthesis research in order to provide insight in its potentalities. We hope that in this way the reader will obtain sufficient information for a critical assessment of the relevant literature, and, perhaps more important, will gain inspiration to tackle problems in his own field of research. The book is not intended to give a comprehensive review of photosynthesis, but nevertheless offers various views on the exciting developments that are going on.

Download or read book A Forecast of Space Technology 1980 2000 written by and published by . This book was released on 1976 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Forecast of Space Technology 1980 2000 written by United States. National Aeronautics and Space Administration. Scientific and Technical Information Office and published by . This book was released on 1976 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Technical Abstract Bulletin written by and published by . This book was released on with total page 908 pages. Available in PDF, EPUB and Kindle. Book excerpt: