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    METHOD OF MAKING A PLASTIC OPTICAL FIBRE, AND A PLASTIC OPTICAL FIBRE
    3.
    发明申请
    METHOD OF MAKING A PLASTIC OPTICAL FIBRE, AND A PLASTIC OPTICAL FIBRE 审中-公开
    制造塑料光纤的方法和塑料光纤

    公开(公告)号：WO9960426A2

    公开(公告)日：1999-11-25

    申请号：PCT/FI9900425

    申请日：1999-05-17

    Applicant: NEXTROM HOLDING SA ,  NK CABLES OY ,  KIRJAVAINEN KARI ,  SUVANTO MARKKU ,  HEINONEN JOUNI

    Inventor： KIRJAVAINEN KARI ,  SUVANTO MARKKU ,  HEINONEN JOUNI

    IPC: G02B6/028 ,  B29C47/00 ,  B29C47/02 ,  B29C47/04 ,  B29C47/12 ,  B29D11/00 ,  G02B6/00 ,  G02B

    CPC classification number: G02B6/02038 ,  B29C47/00 ,  B29C47/0014 ,  B29D11/00663

    Abstract: The invention relates to a method of making a plastic optical fibre, in which method plastic materials with suitable optical properties are fed into an extrusion apparatus so as to form a multilayer structure where the refractive index decreases gradually in a controlled manner from the inside outwards. The invention also relates to a plastic optical fibre. In order to provide flexible and continuous manufacture and a wideband fibre, the extrusion apparatus consists of at least one multilayer conical extruder unit (1) which produces a product where the layers are formed without weld lines, are symmetrical and adhere well to each other. The number of the layers may also be high.

    Abstract translation: 本发明涉及一种制造塑料光纤的方法，其中具有适当光学特性的塑料材料被输送到挤出装置中，以便形成折射率从内向外以受控方式逐渐降低的多层结构。 本发明还涉及塑料光纤。 为了提供灵活且连续的制造和宽带纤维，挤压设备由至少一个多层锥形挤压机单元（1）组成，该单元产生一层产品，其中层不形成焊缝，对称且彼此粘合。 层数也可能很高。

    5.
    发明专利
    未知

    公开(公告)号：DE69732801D1

    公开(公告)日：2005-04-21

    申请号：DE69732801

    申请日：1997-11-27

    Applicant: PANPHONICS OY TAMPERE ,  KIRJAVAINEN KARI

    Inventor： KIRJAVAINEN KARI

    IPC: A61F11/14 ,  G10K11/178

    Abstract: The invention relates to a method and an apparatus for sound processing, where sound is attenuated by measuring it and by producing with an actuator a sound field of opposite sign in view of the original sound field. A desired value signal (I) is supplied to the actuator which reproduces the signal. To the actuator is attached a sensor, measuring sound pressure, and the difference of the sensor signal (B) and the desired value signal (I) is applied as high gain feedback to the actuator. As a consequence, sound not pertaining to the desired value signal (I) can be attenuated in a simple manner, and sound in accordance with the desired value signal (I) can be produced simultaneously with the same apparatus.

    Method and apparatus for processing sound
    6.
    发明专利
    Method and apparatus for processing sound 未知

    公开(公告)号：AU5056298A

    公开(公告)日：1998-06-22

    申请号：AU5056298

    申请日：1997-11-27

    Applicant: KIRJAVAINEN KARI

    Inventor： KIRJAVAINEN KARI

    IPC: A61F11/14 ,  G10K11/178

    Abstract: The invention relates to a method and an apparatus for sound processing, where sound is attenuated by measuring it and by producing with an actuator a sound field of opposite sign in view of the original sound field. A desired value signal (I) is supplied to the actuator which reproduces the signal. To the actuator is attached a sensor, measuring sound pressure, and the difference of the sensor signal (B) and the desired value signal (I) is applied as high gain feedback to the actuator. As a consequence, sound not pertaining to the desired value signal (I) can be attenuated in a simple manner, and sound in accordance with the desired value signal (I) can be produced simultaneously with the same apparatus.

    7.
    发明专利
    未知

    公开(公告)号：FI970475A0

    公开(公告)日：1997-02-04

    申请号：FI970475

    申请日：1997-02-04

    Applicant: KIRJAVAINEN KARI

    Inventor： KIRJAVAINEN KARI

    IPC: A61F11/14 ,  G10K11/178 ,  G10K

    Abstract: The invention relates to a method and an apparatus for sound processing, where sound is attenuated by measuring it and by producing with an actuator a sound field of opposite sign in view of the original sound field. A desired value signal (I) is supplied to the actuator which reproduces the signal. To the actuator is attached a sensor, measuring sound pressure, and the difference of the sensor signal (B) and the desired value signal (I) is applied as high gain feedback to the actuator. As a consequence, sound not pertaining to the desired value signal (I) can be attenuated in a simple manner, and sound in accordance with the desired value signal (I) can be produced simultaneously with the same apparatus.

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