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11.发明授权Television pick-up device suitable for a discontinuous recording of information during continuous operation 失效电视接收装置适用于在连续运行期间不连续地记录信息
公开(公告)号：US4233633A
公开(公告)日：1980-11-11
申请号：US972604
申请日：1978-12-22
申请人： Rudolf Kemner , Rudy R. Cramer
发明人： Rudolf Kemner , Rudy R. Cramer
CPC分类号： H04N5/2283
摘要： A television pick-up device suitable for a discontinuous recording of information during continuous operation, such as, for example, in X-ray television. When information recording is interrupted at a continuing field scanning of a target plate in the pick-up tube, the cathode thereof is supplied from a supply circuit with a higher voltage than during the field scanning during information recording. As a result thereof a negative charging of the free surface of the target plate by the more rapid electrons in the electron beam is prevented, so that at the next recording of information the picture quality on display is not poorer due to signal clipping.
摘要翻译： 一种适用于在连续操作期间例如X射线电视中不连续记录信息的电视拾取装置。 当信息记录在拾取管中的目标板的连续场扫描中中断时，其阴极从信息记录期间比在场扫描期间的电压高的电源电路提供。 结果，防止了电子束中更快的电子对靶板的自由表面的负电荷，使得在下一次记录信息时，由于信号限幅，显示的图像质量不差。
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公开(公告)号：US4952794A
公开(公告)日：1990-08-28
申请号：US388284
申请日：1989-08-01
摘要： As a result of the use of a slow phosphor in the exit screen of an X-ray image intensifier tube, a number of image fields can be picked up by means of the comparatively fast television camera during the afterglow of the phosphor. This enables quantum noise integration and, when use is made of a CCD camera upon display, a resolution can be achieved upon display which corresponds to the resolution of a conventional pick-up tube. Moreover, in accordance with the invention it is no longer necessary to use a controllable diaphragm and a complex interface for the asynchronous pick-up and reading of the image information.
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公开(公告)号：US4689565A
公开(公告)日：1987-08-25
申请号：US748241
申请日：1985-06-24
CPC分类号： G01R33/283
摘要： In a nuclear magnetic resonance apparatus, a loudspeaker element free of magnetic material acts as an acoustic reproduction element. The loudspeaker element is arranged in the magnet space so that the main field of the magnet acts to generate a Lorentz driving force for the element. Together with a microphone function or an additional microphone (50) and an external loudspeaker.microphone system, a two-way acoustic communication system can thus be formed. Such a loudspeaker element free from magnetic material does not produce field disturbances in the magnet.
摘要翻译： 在核磁共振装置中，没有磁性材料的扬声器元件用作声音再现元件。 扬声器元件布置在磁体空间中，使得磁体的主磁场用于为元件产生洛伦兹驱动力。 与麦克风功能或附加麦克风（50）和外部扬声器麦克风系统一起，可以形成双向声学通信系统。 这种没有磁性材料的扬声器元件不会在磁体中产生磁场干扰。
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公开(公告)号：US4302777A
公开(公告)日：1981-11-24
申请号：US150268
申请日：1980-05-15
CPC分类号： H04N5/217
摘要： A flare or scattered light compensation circuit for television, wherein a controllable signal difference amplifier is present to a first input of which a picture signal, affected by flare or scattered light, is applied, a compensation signal obtained by signal integration being applied to a second input. The gain factor of the amplifier is controlled substantially proportional to the quotient of the peak-peak value of the picture signal and of the difference value of the said peak-peak value and the value of the compensation signal.
摘要翻译： 一种用于电视的闪光或散射光补偿电路，其中可控信号差分放大器存在于其施加受闪耀或散射光影响的图像信号的第一输入，通过信号积分获得的补偿信号被施加到第二 输入。 放大器的增益因子被控制成基本上与图像信号的峰 - 峰值的乘数和所述峰 - 峰值的差值和补偿信号的值成比例。
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公开(公告)号：US4051377A
公开(公告)日：1977-09-27
申请号：US642159
申请日：1975-12-18
CPC分类号： A61B6/4441 , A61B6/4071 , A61B6/541 , H05G1/30 , H05G1/36 , A61B6/4021
摘要： The output dose behind the body to be examined in a scanning X-ray examination device is kept constant by controlling the incident dose. As a result, in comparison with known devices an examination can be performed quicker and with a smaller total radiation dose, and a better image of the absorption variations can be obtained.
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公开(公告)号：US5712538A
公开(公告)日：1998-01-27
申请号：US577459
申请日：1995-12-22
CPC分类号： H04N9/16
摘要： A phosphor screen in a display device is scanned by separate electron beams in order to generate images of different frequency content in one color in substantially the same part of the phosphor screen. The different images can be perceived as a composite image for some time. The individual electron beams can be modulated by means of a cathode modulator on the basis of a high frequency and a low frequency component of an electronic image signal or on the basis of an image component and a text component of an electronic image signal. The modulations of the individual electron beams may be slightly delayed relative to one another in order to avoid overloading of the phosphor material.
摘要翻译： 通过单独的电子束扫描显示装置中的荧光屏，以在荧光屏的基本相同的部分中产生一种颜色的不同频率含量的图像。 不同的图像可以被视为合成图像一段时间。 可以基于电子图像信号的高频和低频分量，或者基于电子图像信号的图像分量和文本分量，借助于阴极调制器来调制各个电子束。 单个电子束的调制可以相对于彼此稍微延迟，以避免荧光体材料的过载。
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公开(公告)号：US5625665A
公开(公告)日：1997-04-29
申请号：US546027
申请日：1995-10-20
申请人： Lambertus G. J. Fokkink , Petrus W. J. Linders , Johanna A. M. Sondag-Huet-Horst , Andre R. De Wit , Rudolf Kemner , Frans J. A. Berkers
发明人： Lambertus G. J. Fokkink , Petrus W. J. Linders , Johanna A. M. Sondag-Huet-Horst , Andre R. De Wit , Rudolf Kemner , Frans J. A. Berkers
CPC分类号： G21K1/10
摘要： An X-ray apparatus is provided with a filter (12) for limiting the dynamic range of an X-ray image formed on an X-ray detector (4) by exposure of an object (3), for example a patient to be examined, to X-rays (2). The filter (12) has filter elements (13) including one or more capillary tubes (13), one end of which communicates with a reservoir with an X-ray absorbing liquid. The adhesion of the X-ray absorbing liquid to the inner side of the capillary tubes can be adjusted by means of an electric voltage applied to an electrically conductive layer provided on the inner side of the capillary tubes (13). The degree of filling of the capillary tubes (13) with the X-ray absorbing liquid is adjusted by way of the electric voltage value. The X-ray absorption profile is adjusted within a very short period of time, for example within one second, by adjustment of the electric voltages applied to the capillary tubes (13).
摘要翻译： X射线装置设置有用于通过物体（3）例如待检查的患者的暴露来限制形成在X射线检测器（4）上的X射线图像的动态范围的滤光器（12） ，到X射线（2）。 过滤器（12）具有包括一个或多个毛细管（13）的过滤元件（13），其一端与储存器与X射线吸收液体连通。 可以通过施加到设置在毛细管（13）的内侧上的导电层的电压来调节X射线吸收液体到毛细管内侧的粘附。 通过电压值调节毛细管（13）与X射线吸收液的填充程度。 通过调整施加到毛细管（13）上的电压，在非常短的时间段（例如1秒钟内）调整X射线吸收曲线。
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公开(公告)号：US4616181A
公开(公告)日：1986-10-07
申请号：US539581
申请日：1983-10-06
申请人： Rudolf Kemner , Dirk Sinnema
发明人： Rudolf Kemner , Dirk Sinnema
CPC分类号： G01R33/36 , G01R33/34069 , Y10S505/844
摘要： The transmitter/measurement coil of a nuclear magnetic resonance tomography apparatus for medical diagnosis in which comparatively high Larmor frequencies are used, is divided into a number of parallel-connected subcoils. The self resonance frequency of the coil can thus be made substantially higher than the Larmor frequency, with the result that the coil will have a suitably improved quality factor at higher frequencies, and measurements can be performed with an acceptable signal-to-noise ratio.
摘要翻译： 用于医疗诊断的核磁共振断层摄影装置的发射器/测量线圈，其使用相对较高的拉莫尔频率，被分成多个并联连接的次线圈。 因此，线圈的自谐振频率可以大大高于拉莫尔频率，结果线圈将在较高频率下具有适当改善的品质因数，并且可以以可接受的信噪比进行测量。
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