• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a method and a device for the optical reading of information recorded on a support along a track in the form of diffracting elements. A diffraction pattern comprising a luminous central spot centered on the section of the track to be read and alternately dark and bright adjacent fringes is projected onto the support, the dark fringes adjacent to the central spot coinciding with the track sections in the neighborhood of the track section to be read. To that effect a pupil limited by two edges which are parallel to the direction of travel of the track is utilized, this pupil being placed against the reading objective.
    公开号:SU822773A3
    申请号:SU772505402
    申请日:1977-07-22
    公开日:1981-04-15
    发明作者:Брико Клод；Клод Леюро Жан
    申请人:Томсон-Бранд (Фирма)；
    IPC主号:
    专利说明:

    one
    The invention relates to the field of accumulation of information, and specifically to devices for reproducing with an old recording device.
    A device for reproducing an optical recording medium, comprising a lens located between the light source and the working surface of the optical recording medium tj-, is known.
    This device has a relatively simple design, but it does not allow to reproduce the result of optical recording with a sufficiently high density.
    It is also known to have a device for reproducing from an optical recording medium, which contains a lens, located between a light source and a working surface of an optical recording medium, made with parallel recording tracks, and photodetection elements connected to the inputs of a differential amplifier. The device allows to reproduce the result of optical recording with a sufficiently high density of D3.
    The disadvantage of such a device is the significant distortion of the playback result from the optical recording medium.
    The purpose of the invention is to reduce distortion of the playback result from the optical recording medium.
    This is achieved due to the fact that an E device for reproducing an optical recording medium from an optical recording medium is inserted between the light source and the objective, so that a diffuse light spot can be formed on the working surface of the optical recording medium.
    5, the luminosity maximum of which is combined with the average, reproducible line of the recording track, and the linear minima of the illumination - with the average lines of the adjacent recording tracks.
    0 At the same time photodetecting elements
    are located along the replayed recording track symmetrically with respect to the plane of symmetry of the additional optical element, lens and light source ..
    权利要求:
    Claims (2)
    [1]
    In addition, the additional optical element can be made in the form of a mask mounted on the object and having a rectangular window. 30 An additional optical element can be made in the form of a double-concave cylindrical prism, and the lens in the form of cylindrical lenses. . . FIG. 1 and in FIG. 2 shows possible variants of the proposed device for reproducing from an optical recording medium. The device includes a lens 1 located between the source 2 of the light and the working surface of the carrier 3 optical recording, made with parallel tracks 4 recording. In this case, in the device shown in FIG. 2, objective 1 is made in the form of cylindrical lenses. The device also contains an optional optical element 5 installed between the source 2 of the light and the objective 1 with the possibility of forming a diffractive light 6 optical recording on the working surface of the carrier 3 of the optical recording. The linear MaKCHMVM illumination of the diffraction light spot is combined with the average line of the reproducible track 4 recordings, and the linear minima of the illumination are aligned with the average lines of the neighboring tracks 4 recordings. The device contains a photo. the detecting elements 7 are connected to the inputs of the differential; 1 n amplifier 8 and located along the reproduced track 4 records symmetrically with respect to the plane of symmetry of the additional, optical element 5 of the objective 1 and the source 2 of the light. In the device shown in Figure 1, an additional optical element 5 is made in a video mask, fixed on lens 1 and having a rectangular window, and in the device shown in FIG. 2, in the form of a double-coiled cylindrical prism. In the device, in the process of reproduction, a diffraction light spot 6 is formed on the working surface of the optical recording medium 3, having the form of a rectangular central bright spot surrounded by two orthogonal systems of dark stripes. The rectangular center light spot coincides with the reproducible track 4 of the recording, and the first dark bands coincide with the adjacent tracks 4 of the recording. The use of the invention makes it possible to significantly reduce the distortion of the reproduction result from the optical recording medium. Claims 1 An apparatus for reproducing from an optical recording medium, comprising a lens disposed between a light source and a working surface of an optical recording medium made with parallel tracks of a note, and. Photodetecting elements connected to the inputs of the differential amplifier, characterized in that, in order to reduce the distortion of the playback result from the optical recording medium, an additional optical element is inserted into the device, mounted between the light source and the objective to form a diffraction light p on the working surface of the optical recording medium tna, the linear maximum of the illumination of which is combined with the middle line of the reproducible recording track, and the linear mini linear illumination minds - middle line of adjacent recording tracks, wherein the photodetecting elements are arranged along the track reproducible zapisi.simmetrichno otnobitelno plane of symmetry of the additional optical element, lens and light source. 2. POP device 1, characterized in that the additional optical element is designed as a mask mounted on the lens and having a rectangular window. 3. The device according to claim 1, characterized by e. the fact that the additional optical element is made in the form of a double-concave prism, and the lens is in the form of cylindrical lenses. Sources of information taken in. attention upon examination 1.Patent of France 2178107, cl. G .11 B-7/00, 1973.
    [2]
    2. The patent of France 2235448, cl. G 11 B 7/00, 1975 (prototype).
    Fig.)
    类似技术:
    公开号 | 公开日 | 专利标题
    SU822773A3|1981-04-15|Device for optical record reproduction from carrier
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    同族专利:
    公开号 | 公开日
    FR2359476B1|1978-12-22|
    PL115951B1|1981-05-30|
    JPS6128172B2|1986-06-28|
    DE2733209A1|1978-02-09|
    PL199801A1|1978-04-10|
    CS223956B2|1983-11-25|
    US4171879A|1979-10-23|
    JPS5315104A|1978-02-10|
    FR2359476A1|1978-02-17|
    CA1104716A|1981-07-07|
    GB1560976A|1980-02-13|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    FR2266932B1|1973-03-02|1977-09-02|Thomson Brandt|
    FR2235448B1|1973-06-29|1976-05-07|Thomson Brandt|
    US3983317A|1974-12-09|1976-09-28|Teletype Corporation|Astigmatizer for laser recording and reproducing system|
    US4065786A|1975-09-30|1977-12-27|Rca Corporation|Videodisc playback system|JPH0128336B2|1980-03-12|1989-06-02|Hitachi Ltd|
    US4349901A|1980-06-20|1982-09-14|Eastman Kodak Company|Apparatus and method for reading optical discs|
    JPS5797261U|1980-12-05|1982-06-15|
    NL8103505A|1981-07-24|1983-02-16|Philips Nv|DEVICE FOR POINT SCANNING OF AN OBJECT.|
    NL8104946A|1981-11-02|1983-06-01|Philips Nv|DEVICE FOR READING AND / OR RECORDING AN OPTICALLY READABLE INFORMATION STRUCTURE ON A RECORD CARRIER.|
    JPS58121147A|1982-01-11|1983-07-19|Olympus Optical Co Ltd|Optical information recording and reproducing device|
    DE3776945D1|1986-04-18|1992-04-09|Mitsubishi Electric Corp|OPTICAL HEAD.|
    JP3063805B2|1991-02-25|2000-07-12|オリンパス光学工業株式会社|Optical information reproducing apparatus and recording medium|
    FR2723243B1|1994-07-26|1996-09-06|Thomson Csf|DEVICE FOR RECORDING AND / OR PLAYING MAGNETIC HEADS AND ITS MANUFACTURING METHOD|
    FR2739965B1|1995-10-17|1997-11-07|Thomson Csf|LIGHT TRANSCEIVER DEVICE AND OPTICAL READING SYSTEM|
    KR100354534B1|1998-03-17|2002-12-11|삼성전자 주식회사|Optical pickup for narrow-track optical disk|
    FR2786345B1|1998-11-24|2001-02-09|Thomson Csf|QUANTUM ENCRYPTION DEVICE|
    US7149173B2|2000-10-17|2006-12-12|Thales|Medium for recording optically readable data, method for making same and optical system reproducing said data|
    FR2824905B1|2001-05-15|2003-08-29|Thomson Csf|FIBER OPTIC GYROMETER|
    JP2008531215A|2005-03-01|2008-08-14|マシモ・ラボラトリーズ・インコーポレーテッド|Multi-wavelength sensor attachment|
    US8374665B2|2007-04-21|2013-02-12|Cercacor Laboratories, Inc.|Tissue profile wellness monitor|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    FR7622622A|FR2359476B1|1976-07-23|1976-07-23|
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