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    Method and apparatus for reducing the effects of vibrational disturbances on the frequency stability of a laser
    32.
    发明授权
    Method and apparatus for reducing the effects of vibrational disturbances on the frequency stability of a laser 失效
    用于减少振动干扰对激光器的频率稳定性的影响的方法和装置

    公开(公告)号：US4744634A

    公开(公告)日：1988-05-17

    申请号：US856559

    申请日：1986-04-28

    Applicant: David Fink

    Inventor： David Fink

    IPC: G01J9/02 ,  G01J3/00 ,  H01S20060101 ,  H01S3/02 ,  H01S3/03 ,  H01S3/05 ,  H01S3/08 ,  H01S3/139 ,  G02B9/02

    CPC classification number: H01S3/025 ,  H01S3/08

    Abstract: A method and apparatus are disclosed for mounting an interferometer cavity such as a laser so that constant interferometer resonant frequency is maintained in spite of environmental vibration and other external acceleration forces. The invention can be used alone or in combination with prior art frequency stabilization systems, such as shock mounts and active feedback type stabilization systems.

    Abstract translation: 公开了一种用于安装诸如激光器的干涉仪腔的方法和装置，使得尽管存在环境振动和其他外部加速力，仍保持恒定的干涉仪谐振频率。 本发明可以单独使用或与现有技术的频率稳定系统（例如减震架和主动反馈型稳定系统）结合使用。

    Heat maps for controlling deformations in optical components
    37.
    发明授权
    Heat maps for controlling deformations in optical components 失效

    公开(公告)号：US6065842A

    公开(公告)日：2000-05-23

    申请号：US083551

    申请日：1998-05-22

    Applicant: David Fink

    Inventor： David Fink

    IPC: G01B11/16 ,  G02B7/185 ,  G02B7/192

    CPC classification number: G01B11/16

    Abstract: A system (80) for controlling deformations of optical components adapted for use with laser system aperture sharing elements (16) and deformable mirrors. The inventive system (80) includes a control loop (12, 40, 24, 20, 46, 28, 74, 78, 60, 34) for determining a desired temperature pattern. The control loop (12, 40, 24, 46, 28, 74, 78, 60, 34) provides a control signal (45) corresponding to the desired temperature pattern to a heat map applicator (18, 46, 47, 59, 60). The heat map applicator (18, 46, 47, 59, 60) applies the desired temperature pattern to the optical component (16) in response to the control signal and the optical component (16) is selectively deformed in response thereto. In a specific embodiment, the control loop (12, 40, 24, 20, 46, 28, 74, 78, 60, 34) is a closed loop control system that includes an interferometer (74). The interferometer (74) provides a first shape of the optical component (16) to a comparator circuit (20) that compares the first shape to a desired shape corresponding to the desired temperature pattern for determining the control signal. An alternative closed loop control system (12, 40, 24, 20, 46, 28, 74, 78, 60, 34) includes an infrared energy detector (12) that determines a current temperature pattern and generates the control signal in response thereto for converting the current temperature pattern to the desired temperature pattern. The heat map applicator (18, 46, 47, 59, 60) provides an electromagnetic beam (50, 52) that is swept across the optical component (16) to impart the desired temperature pattern on the optical component (16). In another illustrative embodiment, the control loop is an open loop control system that includes a complimentary electromagnetic energy beam that is swept over the optical component to form a heat pattern complimentary to the temperature pattern imparted to the optical component by a high power laser beam such that the total heat deposited on the optical component is uniform.

    Multi-pulse, multi-return, modal range processing for clutter rejection
    38.
    发明授权
    Multi-pulse, multi-return, modal range processing for clutter rejection 失效
    多脉冲，多返回，模态范围处理，用于杂波抑制

    公开(公告)号：US5760887A

    公开(公告)日：1998-06-02

    申请号：US641255

    申请日：1996-04-30

    Applicant: David Fink ,  Maurice Halmos ,  Dave Goran

    Inventor： David Fink ,  Maurice Halmos ,  Dave Goran

    IPC: G01B11/00 ,  G01S7/48 ,  G01S7/481 ,  G01S7/487 ,  G01S7/497 ,  G01S17/10 ,  G01C3/08

    CPC classification number: G01S17/10 ,  G01S7/4873 ,  G01S7/481 ,  G01S7/497

    Abstract: A laser rangefinding system (12) that utilizes multiple pulse, multiple return, modal range processing for clutter rejection. A laser source (16) emits a series of laser beam pulses (42), and each reflected return from objects (46) in a scene for each of the pulses is recorded. Each return signal above a predetermined threshold is added as a count to a count table within a selected bin representing the range of the return signal. After all of the analog return signals are recorded, the range bin with the most counts is selected as the range of a target.

    Abstract translation: 一种激光测距系统（12），利用多脉冲，多次返回，模态范围处理进行杂波抑制。 激光源（16）发射一系列激光束脉冲（42），并且记录每个脉冲的场景中从物体（46）返回的每一个的每个反射回波。 将高于预定阈值的每个返回信号作为计数添加到表示返回信号的范围的所选择的bin内的计数表。 在记录了所有模拟返回信号之后，选择具有最多计数的范围区作为目标的范围。

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