• 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 the detection of the tracking error of a track using a process of periodic excursion of a reading beam in a direction which forms an angle with the direction of exploration of the track. The detection system comprises a mirror deflection by a bar vibrating in a flexural mode which is clamped to a base. Two plates of piezoelectric elements mechanically coupled with said vibrating bar are provided to excite the vibrating plate and to supply a reference signal in constant phase relation with the movement of the vibrating bar.
    公开号:SU837338A3
    申请号:SU772558104
    申请日:1977-12-22
    公开日:1981-06-07
    发明作者:Малисэн Ролан；Лекомпт Даниель；Монлуи Клод
    申请人:Томсон-Бранд (Фирма)；
    IPC主号:
    专利说明:

    (54) A DEVICE FOR CONTROLLING THE POSITION OF A LASER BEAM WITH RESPECT TO THE WAY FOR VIDEO WIRELESS RECORDS
    which reinforced piezoceramic plate.
    In addition, a device for controlling the position of the laser beam relative to the video track: aastinki may contain an additional piezoceramic plate mounted on a metal plate tripod, a signal conditioner, and an additional piezoceramic plate connected through a shape. A signal with the first output of a sinusoidal voltage driver.
    The device for controlling the position of the laser beam relative to the recording track of the video plate may also contain a phase shifter connected in series and an additional amplifier through which an additional piezoceramic plate is connected to the piezoceramic plate.
    H FIG. 1 shows one of the possible variants of the proposed device for controlling the position of the laser beam relative to the recording track of a video plate; in fig. 2 - the location of the first swinging mirror / in FIG. 3.- connections of a piezoceramic plate and an additional piezoceramic plate.
    The proposed device comprises a first sliding mirror 1 mounted on the housing 2 with the possibility of providing a reflection of the laser beam from the second swinging mirror 3 through the lens 4 and through a video plate 5 having recording tracks 6. In this case, the reflection is provided to the optical shaper 7 of the error signal of the position of the laser beam along the radix of the video plate 5.
    The device also contains a sinusoidal voltage shaper 8, the first output 9 of which is connected to the control input of the synchronous detector 10. The synchronous detector 10 is turned on by the output of the shaper 7 of the position error signal of the laser beam connected to the output bus 11 and the input of the amplifier 12. Amplifier 12 is connected with the input of the mechanism 13 for controlling the position of the second swinging mirror 3.
    In addition, the device contains, in addition, a piezoceramic plate 14 connected to a second output gr -15 driver 8 sinusoidal voltages, and a metal plate tripod 16, the end of which is fixed in the housing 2. In this case, the first swing mirror 1 is fixed on one part of a metal plate tripod 16, on the other part of which the piezoceramic plate 14 is fastened.
    Between the first and second oscillating mirrors 1 and 3, a collective lens 17 is installed, through which the laser beam, generated by the generator 18 and reflected from the first mirror 1, passes.
    The proposed device may also contain additional piezoceramic plate 19, mounted on a metal plate tripod 16, and the shaper 20 signal. In this case, an additional piezoelectric plate 19 is connected via a signal shaper 20 to a first output 9 of a shaper 8 sinusoidal voltages.
    The device also has a phase shifter 21 connected in series and an additional amplifier 22, through which an additional piezoceramic plate 19 is connected to the piezoelectric ceramic plate 14. At the same time, the output of the additional amplifier 22 coincides with the output 15 of the driver 8 sinusoidal voltages.
    In the proposed device, the synchronous detector 10 generates a signal whose amplitude and polarity respectively characterize the magnitude and direction of displacement of the laser beam relative to track 6 of the video plate 5, This signal serves for such control of the position of the second swinging mirror 3 which reduces its displacement of the laser beam relative to the track 3 records of the video plate 5. Moreover, the first swinging mirror 1 provides periodic deviations of the laser beam in accordance with the signal on the second output driver 8 15 sinusoidal voltages.
    The use of the invention makes it possible to significantly reduce the error in controlling the position of the laser beam relative to the recording track of the video plate.
    权利要求:
    Claims (3)
    [1]
    1. A device for controlling the position of the laser beam relative to the recording track of a video plate, comprising a first rocking mirror mounted on the housing with the possibility of providing a reflection of the laser beam from the second rocking mirror and through the video plate on the optical shaper triggered the position error of the laser beam along the radius of the recording track of the video plate, and shaper of sinusoidal voltages, the first of whose outputs is connected, k to the control input of a synchronous detector connected between the output m shaper position error signal of the laser beam and / amplifier input connected to the input of the second position control mechanism for the swinging of the mirror.
    characterized in that, in order to reduce the control error, a piezoceramic plate connected to the second output of the sinusoidal voltage driver, and a metal plate tripod, the end of which is fixed in the housing, is inserted into it, and the first swing mirror is fixed on one part of the metal plate support , on the other part of which a piezoceramic plate is fixed.
    [2]
    2. A device according to claim 1, characterized in that it comprises an additional piezoceramic plate mounted on a metal plate tripod and a signal conditioner, wherein the additional piezoceramic plate is connected through a signal conditioner to the nepBfcJM output of the sinusoidal voltage former.
    [3]
    3. The device according to claim 2, characterized in that it comprises a phase shifter connected in series and an additional amplifier through which an additional one is connected to the piezoceramic plate.
    0 piezo ceramic plate.
    Sources of information taken into account in the examination
    1.Patent of France No. 2251067, cl. G 11 B 7/00, 1975.
    five
    2. The patent of Germany No. 2311196,
    cl. G 11 B 7/00, 08/05/76 (prototype).
    --- /
    (rig. /
    F1 / 2.g
    类似技术:
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    同族专利:
    公开号 | 公开日
    DE2757441C2|1988-08-11|
    JPS5382304A|1978-07-20|
    PL203302A1|1978-08-14|
    GB1550790A|1979-08-22|
    US4169227A|1979-09-25|
    FR2375690A1|1978-07-21|
    CA1098621A|1981-03-31|
    IT1090629B|1985-06-26|
    DE2757441A1|1978-07-06|
    NL7714100A|1978-06-27|
    FR2375690B1|1980-09-12|
    JPS6034170B2|1985-08-07|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3985952A|1974-02-04|1976-10-12|Zenith Radio Corporation|Elasto-optic device for spot wobble in a video disc player|
    FR2260163B1|1974-02-04|1979-08-03|Thomson Brandt|
    DE2423074C2|1974-05-13|1983-09-22|Robert Bosch Gmbh, 7000 Stuttgart|Device for tracking a light beam scanning head|
    FR2294451B1|1974-12-09|1977-11-10|Anvar|
    NL174609C|1975-10-15|1984-07-02|Philips Nv|TRACK MIRROR IN AN OPTICAL RECORD PLAYER.|
    NL7600479A|1976-01-19|1977-07-21|Philips Nv|AUTOMATIC OPTICAL FOCUSING SYSTEM.|US4302830A|1978-05-10|1981-11-24|Olympus Optical Company Ltd.|Optical information reading-out apparatus|
    US4349732A|1980-01-07|1982-09-14|The Singer Company|Laser spatial stabilization transmission system|
    FR2509077B1|1981-07-03|1983-10-28|Thomson Csf|
    DE3339736C1|1983-11-03|1985-06-05|Deutsche Thomson-Brandt Gmbh, 7730 Villingen-Schwenningen|Tracking system for the correction of tangent misalignments with optical disk scanning|
    JPH0540224A|1990-07-26|1993-02-19|Fuji Photo Film Co Ltd|Scan type microscope|
    DE4442976A1|1994-12-02|1996-06-05|Thomson Brandt Gmbh|Device for the contactless optical scanning of information when recording on and / or playing back from a recording medium with recording tracks|
    US5694237A|1996-09-25|1997-12-02|University Of Washington|Position detection of mechanical resonant scanner mirror|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    FR7638894A|FR2375690B1|1976-12-23|1976-12-23|
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