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 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 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 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 Papers on Light Modulation Detection written by Burton J. McMurtry and published by . This book was released on 1962 with total page 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 2180 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Light Modulation Techniques written by Howard William LeBrun and published by . This book was released on 1963 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Visible Light Communications written by Zhaocheng Wang and published by John Wiley & Sons. This book was released on 2017-11-29 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: A complete and comprehensive reference on modulation and signal processing for visible light communication This informative new book on state-of-the-art visible light communication (VLC) provides, for the first time, a systematical and advanced treatment of modulation and signal processing for VLC. Visible Light Communications: Modulation and Signal Processing offers a practical guide to designing VLC, linking academic research with commercial applications. In recent years, VLC has attracted attention from academia and industry since it has many advantages over the traditional radio frequency, including wide unregulated bandwidth, high security, and low cost. It is a promising complementary technique in 5G and beyond wireless communications, especially in indoor applications. However, lighting constraints have not been fully considered in the open literature when considering VLC system design, and its importance has been underestimated. That’s why this book—written by a team of experts with both academic research experience and industrial development experience in the field—is so welcome. To help readers understand the theory and design of VLC systems, the book: Details many modern techniques on both modulation and signal processing aspects Links academic research with commercial applications in visible light communications as well as other wireless communication systems Combines theoretical rigor with practical examples in presenting optical camera communication systems Visible Light Communications: Modulation and Signal Processing serves as a useful tool and reference book for visible light communication professionals, as well as wireless communication system professionals and project managers. It is also an important guide for undergraduates and graduates who want to conduct research in areas of wireless communications.

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.

Download or read book Light ray Modulation Method for Detection of Blade Vibration written by Barry Alan Stein and published by . This book was released on 1957 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Light Modulation Techniques written by George D. Currie and published by . This book was released on 1966 with total page 55 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book NASA SP written by and published by . This book was released on 1972 with total page 916 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 U S Government Research Development Reports written by and published by . This book was released on 1969-10 with total page 784 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Interference Light Modulation Recording Techniques written by R. J. Ayres and published by . This book was released on 1964 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt: This final report covers a 12-month program of theoretical and experimental effort leading to the development of Light Modulation Recording Techniques for (Near) Real-Time Display. A complete theoretical analysis is presented of the interference-modulation technique, and all performance iquations are derived. Results of the program have shown that the technique is theoretically capable of providing a 20-Mc/sec modulation bandwidth with a modulation factor approaching 100 percent. This report describes and analyzes the laboratory breadboard model developed under the program; experimental tests performed on the model verified the theory and demonstrated that the techniques developed are feasible. Several experimentally obtained oscillograms and graphs are shown of modulator response, optical-transmission efficiency, modulation factor, and scanner performance. (Author).

Download or read book Government wide Index to Federal Research Development Reports written by and published by . This book was released on 1965-03 with total page 720 pages. Available in PDF, EPUB and Kindle. Book excerpt: