ITE Technical Report
Online ISSN : 2433-0914
Print ISSN : 0386-4227
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Volume 18, Issue 31
Displaying 1-6 of 6 articles from this issue
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  • [title in Japanese]
    Article type: Cover
    1994 Volume 18 Issue 31 Pages Cover1-
    Published: June 10, 1994
    Released on J-STAGE: October 13, 2017
    DOIhttps://doi.org/10.11485/tvtr.18.31_Cover1
    RESEARCH REPORT / TECHNICAL REPORT FREE ACCESS
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  • [title in Japanese]
    Article type: Index
    1994 Volume 18 Issue 31 Pages Toc1-
    Published: June 10, 1994
    Released on J-STAGE: October 13, 2017
    DOIhttps://doi.org/10.11485/tvtr.18.31_Toc1
    RESEARCH REPORT / TECHNICAL REPORT FREE ACCESS
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  • Magnetic Thin Film Head for VCR
    Hiroyuki Hayashi, Hisanori Yoshimizu, Toyoaki Takayasu, Togo Nishiyama
    Article type: Article
    1994 Volume 18 Issue 31 Pages 1-6
    Published: June 10, 1994
    Released on J-STAGE: October 13, 2017
    DOIhttps://doi.org/10.11485/tvtr.18.31_1
    RESEARCH REPORT / TECHNICAL REPORT FREE ACCESS
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    This paper describes the read-write and wear characteristics of the magnetic thin film head for VCR, which is designed to consist of only inorganic materiels and to resist high temperature heat treatment. The thin film head has the sufficient performance for use of video head: its characteristics are low inductance, low direct current resistance, high carrier to noise ratio at 21MHz carrier frequency, and good abrasion resistance with metal evaporated tape at 10.1 m/sec relative tape-head speed.
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  • A Study of the Electro magnetic Characteristics of Digital VCR using Metal Evaporated Tape
    M Shimotashiro, M Tokunaga, S. Ogata, A. Iketani, A. Kuroe
    Article type: Article
    1994 Volume 18 Issue 31 Pages 7-12
    Published: June 10, 1994
    Released on J-STAGE: October 13, 2017
    DOIhttps://doi.org/10.11485/tvtr.18.31_7
    RESEARCH REPORT / TECHNICAL REPORT FREE ACCESS
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    Recently, great progress has been made in the high-density digital magnetic recording technique. The consumer-use digital VCR using metal evaporated tape is built as a trial. Electro-magnetic characteristics of the VCR is also investigated. As a result, it is shown that setting level of recording current is very important to satisfy the characteristics of the VCR such as output level, over-write ratio and waveform asymmetry. Relations between the waveform asymmetry and gap length of the recording head are clarified, and it is also shown that the waveform asymmetry of the signal recorded with wide-gap head can be compensated by the recording equalizer.
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  • High Density Optical Storage with the Multiplexed Holographic Recording Method on the SBN Single Crystal
    Koutarou NONAKA, Shougo YAGI, Manabu YAMAMOTO
    Article type: Article
    1994 Volume 18 Issue 31 Pages 13-20
    Published: June 10, 1994
    Released on J-STAGE: October 13, 2017
    DOIhttps://doi.org/10.11485/tvtr.18.31_13
    RESEARCH REPORT / TECHNICAL REPORT FREE ACCESS
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    To increase storage capacity and data transfer rate in the optical mass storage system, we have been studying multiplexed holographic recording in the SBN single crystal. The diffraction efficiency analysis gives the optimum crystal thickness and angular selectivity of holograms. To obtain high SNR reconstructed image, we determined the object and reference beam characteristics. These analysis and characterization result in angle-multiplexed storage of 16 holograms with 0.3% diffraction efficiency and 0.3° angular selectivity.
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  • [title in Japanese]
    Article type: Appendix
    1994 Volume 18 Issue 31 Pages App1-
    Published: June 10, 1994
    Released on J-STAGE: October 13, 2017
    DOIhttps://doi.org/10.11485/tvtr.18.31_App1
    RESEARCH REPORT / TECHNICAL REPORT FREE ACCESS
    Download PDF (64K)
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