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1. 发明专利

JPS63251923A MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING AND REPRODUCING METHOD USING SAID MEDIUM 失效
公开(公告)号：JPS63251923A
公开(公告)日：1988-10-19
申请号：JP8467687
申请日：1987-04-08
申请人： FUJI PHOTO FILM CO LTD , JAPAN BROADCASTING CORP
发明人： KITAMOTO TATSUJI , SASAZAWA KOJI , MIZUGUCHI HODAKA , SHIBATANI HIROMICHI
IPC分类号： G11B5/706 , C09D5/23 , C09D7/12 , G11B5/00 , G11B5/02 , G11B5/716 , G11B5/78 , H04N5/782
摘要： PURPOSE:To decrease spurious components and to improve the signal to noise ratio of color signals by using a magnetic recording medium formed by constituting magnetic materials having different reproduction output characteristics to temp. into two layers. CONSTITUTION:A magnetic recording layer contg. a barium ferrite magnetic material in the upper layer and the magnetic recording layer contg. a magnetic material consisting of chromium dioxide or Co-modified iron oxide alone or mixture composed thereof in the lower layer are provided on a base. The magnetic material to be used for the lower layer is preferably Co-FeOx and CrO2 which are reverse in the characteristic of a change in coercive force with temp. from Ba ferrite and further, CrO2 having a large difference in a change in magnetization with temp. Since the magnetic recording layer is constituted in the double layers in such a manner, recording of an F1 component in the lower layer and an f2 component in the upper layer is possible if the f1 component of the low frequency range is recorded by a 1st head and in succession the f2 component of the higher frequency range is recorded by a 2nd head. Since the f1 component is decreased by medium heating at the time of reproduction, the spurious components to be incorporated into the f2 component decrease as well. The recording level of the f2 component is thereby increased further and the SN of the reproduced f1 component is improved.

2. 发明专利

JPH11249254A FILM WITH IC MEMORY AND EQUIPMENT USING THIS FILM 失效
公开(公告)号：JPH11249254A
公开(公告)日：1999-09-17
申请号：JP5222398
申请日：1998-03-04
申请人： FUJI PHOTO FILM CO LTD
发明人： SASAZAWA KOJI
IPC分类号： G03C1/765 , G03B17/24 , G03C3/00
摘要： PROBLEM TO BE SOLVED: To prevent the dissipation of added information, to simplify reading and writing of added information and to reduce cost by integrating a photographic film and an IC memory. SOLUTION: An IC memory unit 20 is provided with an antenna coil 24 for contactless communication with the outside, a communicating circuit, an IC chip including an IC memory or the like, on a flexible board 22, and is formed thin to have flexibility. This IC memory unit 20 is integrally provided outside of a photographing area of a photographic film 10 to form a film with IC memory. The added information of the photographic film 10 is therefore prevented from being dissipated from the photographic film 10, and the added information is read and written in a contactless state so as to dispense with an electrical contact.

3. 发明专利

JPH08298672A DEVICE AND METHOD FOR RECORDING PICTURE DATA AND DEVICE AND METHOD FOR REPRODUCING PICTURE DATA 失效
公开(公告)号：JPH08298672A
公开(公告)日：1996-11-12
申请号：JP12455695
申请日：1995-04-26
申请人： FUJI PHOTO FILM CO LTD
发明人： SASAZAWA KOJI
IPC分类号： H04N9/804 , H04N9/67 , H04N9/808 , H04N9/81 , H04N11/04
摘要： PURPOSE: To attain a still picture with high picture quality and high resolution while holding interchangeability with existing standards by recording the luminance data and color difference data of a divided frame in a unit picture data recording area of a recording medium. CONSTITUTION: An image of a subject is formed on the photodetecting face of a CCD 12 through an image pickup lens 11 and an analog video signal indicating the subject image is outputted from the CCD 12 and applied to a data generating circuit 13. The analog video signal is converted into digital picture data by the circuit 13 and data processing for the picture data is executed so that serial picture data express horizontal and vertical pictures. Picture data outputted from the circuit 13 are applied to a luminance/color difference generating circuit 14, which generates luminance data Y and color difference data R-Y, B-Y and applies these generated data to a picture data divider circuit 16. The circuit 16 divides the picture data and the color difference data B-Y, R-Y are respectively applied to sampling circuits 15A, 15B, which respectively compress the data volume of respective data B-Y, R-Y to 1/4.

4. 发明专利

JPH08294091A IMAGE DATA PROCESSING UNIT AND ITS METHOD, IMAGE DATA RECORDER AND ITS METHOD, AND IMAGE DATA REPRODUCING DEVICE AND ITS METHOD 失效
公开(公告)号：JPH08294091A
公开(公告)日：1996-11-05
申请号：JP11774395
申请日：1995-04-20
申请人： FUJI PHOTO FILM CO LTD
发明人： SASAZAWA KOJI
IPC分类号： H04N5/92 , H04N7/01
摘要： PURPOSE: To reproduce and display recorded image data with a different aspect ratio by operating a changeover switch and selecting image data of DVTR and connecting the selected data to plural vertical filtering circuits. CONSTITUTION: A video signal outputted from a CCD 12 is given to a data read circuit 13, in which the signal is converted into digital data, which are given to a data arrangement generating circuit 14. The image data outputted from the circuit 14 enter a changeover switch 15. The switch 15 is set to the wide mode or the normal mode through the mode setting, and in the case of the wide position, the data are given to a 1st vertical filtering circuit 17 via a data extract circuit 16, and in the case of the normal mode, the data are led to a 2nd vertical filtering circuit 18 selectively. The circuits 17, 18 are connected to a data compression circuit 20 by the switching of a switch 19 and to a magnetic head 22 via a data arrangement generating circuit 21. The magnetic head 22 records the image data and the mode data onto the magnetic tape.

5. 发明专利

JPH01223632A METHOD AND DEVICE FOR MANUFACTURING MAGNETIC RECORDING MEDIUM 失效
公开(公告)号：JPH01223632A
公开(公告)日：1989-09-06
申请号：JP2181188
申请日：1988-02-01
申请人： FUJI PHOTO FILM CO LTD
发明人： YASUNAGA TADASHI , YANAI AKIO , SASAZAWA KOJI
IPC分类号： C23C14/06 , G11B5/85 , H01F41/14 , H01F41/20
摘要： PURPOSE:To obtain the title medium being excellent in corrosion resistance and to form a film of the medium at high speed by feeding simultaneously an iron vapor current, a nitrogen molecule being in an excitation state and/or a nitrogen atom current and an ion current and forming an iron nitride compound ferromagnetic thin film. CONSTITUTION:Iron 10 contained in a crucible 11 in a vacuum tank is heated and melted by an electron beam 9 and adjusted so that a constant evaporation speed can be obtained. On the other hand, Ar gas is led into a gas leading-in port 7, and N2 gas is led into a gas leading-in port 6. Thereafter, by operating an ion gun 8, a state that an argon ion current can be fed is obtained. Also, in a plasma generating chamber 4, a coil 5 is wound round so that plasma can be generated. After said preparations are executed, the beam 9 is radiated, power is turned on to the ion gun 8 and the coil 5, and an iron vapor current and the ion current 13, a nitrogen molecule being in an excitation state and a nitrogen atom current 14 are fed simultaneously onto polyethylene terephthalate 2 which is placed on a fundamental holder 1, and a film of iron nitride is formed.

6. 发明专利

JPS6414727A APPARATUS FOR PRODUCING MAGNETIC RECORDING MEDIUM 失效
公开(公告)号：JPS6414727A
公开(公告)日：1989-01-18
申请号：JP17179287
申请日：1987-07-09
申请人： FUJI PHOTO FILM CO LTD
发明人： YASUNAGA TADASHI , YANAI AKIO , SASAZAWA KOJI
IPC分类号： G11B5/85 , C23C14/24 , C23C14/48 , C23C14/56
摘要： PURPOSE:To prevent the degradation in ion beam intensity and to improve magnetic characteristics by decreasing the pressure in an ion beam route positioned between a means for projecting the ion beam and means for supporting a substrate lower than the pressure in a vessel around the same. CONSTITUTION:The ion beam 22 arrives at the vapor deposition section by being passed through the ion beam flying route the internal pressure of which is maintained lower than the pressure in the vapor deposition chamber around the same by a duct 23 which is connected to the front end of an ion gun 19 and is disposed with the open end thereof near to the vapor deposition section mentioned above, a duct 24 which is led out of a part of the duct 23, and a differential evacuating means 25 consisting of a pump for a high vacuum, baffle, valve, etc. Namely, the particles of the vapor flow 14 of a magnetic material 12 arriving at the vapor deposition section react efficiently with the ion beam 22 arriving at the vapor deposition section at the decreased collision against the residual gas without decreasing the intensity thereby in the ion beam flying route which is partitioned from the circumference by the dust 23 and the maintained under the additionally lower pressure by differential evacuation.

7. 发明专利

JPS63282921A PRODUCTION OF MAGNETIC RECORDING MEDIUM 失效
公开(公告)号：JPS63282921A
公开(公告)日：1988-11-18
申请号：JP11852187
申请日：1987-05-15
申请人： FUJI PHOTO FILM CO LTD
发明人： YASUNAGA TADASHI , SASAZAWA KOJI
IPC分类号： G11B5/66 , C10M105/34 , C10N40/18 , C10N70/00 , G11B5/64 , G11B5/72 , G11B5/725 , G11B5/84
摘要： PURPOSE:To provide the title magnetic recording medium having sufficient resistance to the corrosion of gaseous SO2 and having a low friction coefficient by forming a thin-fim magnetic layer on a nonmagnetic substrate, exposing the surface to a glow discharge atmosphere, and then immediately furnishing a protecting and lubricating layer. CONSTITUTION:The rolled vapor-deposited article 21 obtained by passing the nonmagnetic substrate 22 through a roll-type vapor deposition device is treated with a glow discharge while being rewound in a glow discharge zone 23, the protecting and lubricating layer is then immediately coated by a coating head 24, and the material is dried in a drying zone 25. Rare gases such as Ne, Ar, and Kr or standard gases such as O2, N2, and CO2 are selected in accordance with the purpose, and introduced into the discharge zone 23 to generate glow discharge. A 12-18C fatty acid such as oleic acid, myristic acid, and stearic acid, their metal salts and esters, etc., are exemplified as the compd. to be used for the protecting and lubricating layer, and >=50% fatty acid or its metal salt is preferably incorporated into the layer.

8. 发明专利

JPS63261535A PRODUCTION OF MAGNETIC RECORDING MEDIUM 失效
公开(公告)号：JPS63261535A
公开(公告)日：1988-10-28
申请号：JP9543487
申请日：1987-04-20
申请人： FUJI PHOTO FILM CO LTD
发明人： NISHIDA TETSUJI , YASUNAGA TADASHI , YANAI AKIO , SASAZAWA KOJI
IPC分类号： G11B5/85
摘要： PURPOSE:To uniformize the distribution of thin iron nitride films to be formed by using at least two ion guns for projection of ion beams and projecting the same place of a nonmagnetic base. CONSTITUTION:The same place of the nonmagnetic base 3 is irradiated by using at least two ion guns 6a, 6b for projection of the ion beams in a process for production of a magnetic recording medium to produce the magnetic recording medium having the magnetic layer consisting of the thin iron nitride films by execution of vapor deposition while projecting the ion beams onto the nonmagnetic base. The nitrogen ions to be irradiated differ in the incoming directions and, therefore, the irradiation doses of the nitrogen ions are uniformed if the same place on the nonmagnetic base is irradiated by >=2 ion guns in such a manner. The distribution thin iron nitride films is thus uniformized and since the range where said films are filmed are widened, this method is applicable to nonmagnetic bases of broad width.

9. 发明专利

JPH08294090A RECORDER FOR DIGITAL IMAGE DATA AND ITS METHOD 失效
公开(公告)号：JPH08294090A
公开(公告)日：1996-11-05
申请号：JP11774295
申请日：1995-04-20
申请人： FUJI PHOTO FILM CO LTD
发明人： SASAZAWA KOJI
IPC分类号： H04N5/92 , H04N7/01 , H04N9/80
摘要： PURPOSE: To improve the efficiency of data compression by fixing an ineffective part and compressing data for each block when an image with a different aspect ratio is obtained from a standard image. CONSTITUTION: An image formed onto a light receiving face of a CCD 12 is a standard image having an aspect ratio of 4:3. Image data are arranged to be the standard image by a data arrangement generator 15 via a data reading 13, a luminance color difference signal generator 14, and image data of an invalid part are fixed to a prescribed level by an image data fixing processing section 16. Then, only color difference data are given to a data compressor 19 together with luminance data via sampling converters 17A, 17B. The data compression is conducted in the unit of blocks each comprising 8×8 picture elements and the data quantity after compression is fixed to be a prescribed quantity. High compression is attained for the invalid image data, resulting that low compression is enough for the valid image data. The compressed data are recorded on a magnetic tape 8 from a magnetic head 21 via a data string generator 20.

10. 发明专利

JPH04356719A MAGNETIC RECORDING MEDIUM AND PRODUCTION THEREOF 失效
公开(公告)号：JPH04356719A
公开(公告)日：1992-12-10
申请号：JP15742991
申请日：1991-06-03
申请人： FUJI PHOTO FILM CO LTD
发明人： FUNAHASHI MASATO , SASAZAWA KOJI , ABE NAOTO , NAKAMIGAWA JIYUNICHI
IPC分类号： G11B5/66 , G11B5/64 , G11B5/738 , G11B5/85
摘要： PURPOSE:To provide the magnetic recording medium of a ferromagnetic metallic thin film type which can attain an improvement in reproduced output and C/N in a particularly high frequency range, i.e., short wavelength in order to obtain the high reproduced output and C/N over a wide recording frequency range. CONSTITUTION:A nonmagnetic substrate layer 2 formed by a vacuum film forming method and a high magnetic energy layer 3 which is so formed as to increase the quantity of the oxygen to be introduced into the vapor flow of a ferromagnetic metal in the late period of film formation are successively laminated on a nonmagnetic base body 1. The above-mentioned high magnetic energy layer 3 is the high magnetic energy layer having >=6.5X10 (gauss oersted) product of the residual magnetic flux density and antimagnetic force thereof. In addition, this high magnetic energy layer contains oxygen and the oxygen concn. on the front surface side thereof is higher than the oxygen concn. on the nonmagnetic base body side.

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