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    Telephone
    41.
    外观设计
    Telephone 失效

    公开(公告)号：USD377935S

    公开(公告)日：1997-02-11

    申请号：US036312

    申请日：1995-03-17

    Applicant: David Fink

    Designer： David Fink

    Optical frequency shifter
    43.
    发明授权
    Optical frequency shifter 失效
    光学变频器

    公开(公告)号：US5262889A

    公开(公告)日：1993-11-16

    申请号：US871890

    申请日：1992-04-21

    Applicant: David Fink

    Inventor： David Fink

    IPC: G02B26/00 ,  G02F2/02 ,  A03F7/00

    CPC classification number: G02B26/002 ,  G02F2/02

    Abstract: A method and apparatus for frequency shifting an optical beam where the frequency shifted beam remains both spatially and temporally coherent with no spread in frequency and can be continually tuned in frequency shift over a wide range without any change in beam pointing or beam quality with time. This is achieved by changing the effective optical path length of the resonant cavity of a laser by translating an optical wedge, such as a prism, across the optical path in the direction of the wedge gradient. In a first embodiment, a rotating helical phase plate is used to linearly increase the optical path of a transmitted or reflected beam with time, thereby frequency shifting the exiting beam. In another embodiment, the rim of a wheel with a spirally increasing or decreasing radius is used in which the outer periphery of the wheel is a mirror. Spinning the wheel at a constant rotational speed increases or decreases the optical path of a reflected beam linearly with time, thereby frequency shifting the reflected beam. The helical phase plate can be used in either a transmissive mode or a reflective mode, whereas the spiral wheel is used primarily in a reflective mode.

    Abstract translation: 一种用于对光束进行频移的方法和装置，其中频移波束保持空间和时间相干性，而不会频率扩展，并且可以在宽范围内连续调谐频移，而不会随着时间而波束指向或波束质量的任何变化。 这是通过在楔形梯度的方向上横过光路平移光学楔（例如棱镜）来改变激光器的谐振腔的有效光程长度来实现的。 在第一实施例中，使用旋转螺旋相位板来随时间线性增加透射或反射光束的光路，从而使出射光束频移。 在另一个实施例中，使用具有螺旋增加或减小的半径的轮的轮缘，其中车轮的外周是镜子。 以恒定的旋转速度旋转轮子随时间线性地增加或减小反射光束的光路，从而使反射光束频移。 螺旋相位板可以以透射模式或反射模式使用，而螺旋轮主要用于反射模式。

    Zero loss waveguide coupler
    44.
    发明授权
    Zero loss waveguide coupler 失效
    零损耗波导耦合器

    公开(公告)号：US5212747A

    公开(公告)日：1993-05-18

    申请号：US871886

    申请日：1992-04-21

    Applicant: David Fink

    Inventor： David Fink

    IPC: H01S3/08 ,  G02B6/32 ,  H01S3/03 ,  H01S3/139

    CPC classification number: G02B6/32 ,  H01S3/0315

    Abstract: A waveguide coupler comprises a curved end reflector mirror that images a waveguide exit back into the waveguide with an essentially exact reproduction of the waveguide output intensity distribution. The coupler also comprises a lens disposed near the waveguide exit at a point between the exit and the mirror, the lens providing a phase compensation to the beam passing therethrough such that the phase of the beam returned to the waveguide matches that of the exiting beam. Thus, coupling losses due to clipping of the returned beam at the exit/entrance to the waveguide bore and coupling losses due to a mismatch of the returning field phase to that of the waveguide mode are made essentially zero. Other embodiments of the coupler are presented wherein the phase compensating lens is positioned at locations other than adjacent to the waveguide exit, or wherein no inversion of the imaged field field distribution occurs, or wherein the beam is not caused to be focused at the center of a lens, or wherein one waveguide is coupled to another waveguide having a similar sized or a dissimilar sized bore.

    Single spectral line laser
    45.
    发明授权
    Single spectral line laser 失效
    单光谱线激光器

    公开(公告)号：US5172387A

    公开(公告)日：1992-12-15

    申请号：US706471

    申请日：1991-05-28

    Applicant: David Fink

    Inventor： David Fink

    IPC: H01S3/104 ,  H01S3/07 ,  H01S3/13 ,  H01S3/22 ,  H01S3/223 ,  H01S3/23

    CPC classification number: H01S3/2232 ,  H01S3/073 ,  H01S3/13

    Abstract: This invention forces a multi-spectral line laser to operate on a single spectral line by modifying the gain of the medium instead of the standard approach of modifying the loss of the cavity. The spectral line selected by the system of the present invention is always the same identical spectral line. There are no ambiguities in knowing which line has been selected as there are with other methods. The invention involves a system for using more than one type of gain media within the laser cavity. Each medium gives rise to a distinct set of spectral line frequencies at which it has gain. Only occassional coincidences will occur at which spectral lines from two or more media fall within a linewidth of each other. Where these coincidences do not occur, the gain for a spectral line is only proportional to the amount of the individual medium present and will be below threshold. Where the coincidences do occur, the total gain is proportional to the total amount of gain for all of the involved media and the line will lase. Spectral lines that are within one operating linewidth of one another may be achieved by the use of two different types of gain media within the laser cavity. The most promising embodiment of the present invention is to use the same type of gain media but with different isotopes, which would, in many but not all cases, allow a physical mixing of the media within the resonant cavity. Each medium or isotope gives rise to a different and distinct set of spectral line frequencies at which the system has gain. Only occasional coincidences will occur at which spectral lines from two or more media fall within a linewidth of each other. Where these coincidences do not occur, the gain for a spectral line is only proportional to the amount of the individual medium present and will be below threshold. Where the coincidences do occur, the total gain is proportional to the total amount of all the involved media and the line will lase.

    Splicing system
    49.
    发明授权
    Splicing system 有权
    拼接系统

    公开(公告)号：US08023805B2

    公开(公告)日：2011-09-20

    申请号：US11628402

    申请日：2005-06-08

    Applicant: David White ,  Kevin A. Murray ,  Ezra Darshan ,  Moshe Shlissel ,  David Fink ,  David Whittaker ,  Zeev Geyzel ,  Reuven Wachtfogel

    Inventor： David White ,  Kevin A. Murray ,  Ezra Darshan ,  Moshe Shlissel ,  David Fink ,  David Whittaker ,  Zeev Geyzel ,  Reuven Wachtfogel

    IPC: H04N5/93 ,  H04N5/917

    CPC classification number: G11B27/105 ,  G11B27/322 ,  H04N21/4325 ,  H04N21/44016

    Abstract: A method for switching from playing a first compressed data segment to playing a second compressed recorded data segment, the method including playing an uncompressed copy of a start of the second compressed recorded data segment upon switching from playing the first compressed data segment, decoding the second compressed recorded data segment from a preceding random access point, the preceding random access point preceding, in the second compressed recorded data segment, a point at which playing is to be switched to the second compressed recorded data segment, stopping the decoding of the second compressed recorded data segment when reaching a point beyond a point currently being played in the uncompressed copy, and switching to playing the second compressed recorded data segment when playing the uncompressed copy of a start of the second compressed recorded data segment reaches the point at which the decoding of the second compressed recorded data segment was stopped. Related apparatus and methods are also provided.

    Abstract translation: 一种用于从播放第一压缩数据段切换到播放第二压缩记录数据段的方法，所述方法包括：从播放所述第一压缩数据段切换时播放所述第二压缩记录数据段的开始的未压缩副本， 从前一个随机接入点的前一随机接入点的压缩记录数据段，在第二压缩记录数据段中的前一个随机接入点，播放要切换到第二压缩记录数据段的点，停止对第二压缩记录数据段的解码 当到达超过当前在未压缩副本中播放的点的点时记录数据段，并且当播放第二压缩记录数据段的开始的未压缩副本时切换到播放第二压缩记录数据段到达解码的点 的第二压缩记录数据段被停止。 还提供了相关的装置和方法。

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