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    • 4. 发明授权
    • Magneto-optic readout apparatus using polarization switching of readout
beam
    • 使用读出光束的偏振切换的磁光读出装置
    • US5182735A
    • 1993-01-26
    • US319031
    • 1989-03-06
    • Clark N. KurtzJoseph J. Miceli, Jr.
    • Clark N. KurtzJoseph J. Miceli, Jr.
    • G11B7/125G11B7/135G11B11/105
    • G11B7/1365G11B11/10515G11B11/10545G11B7/125
    • A magneto-optic playback apparatus which plays back information from a recording layer (RL) which exhibits different light absorption of left and right circular polarized beams emitted from a laser (L). The laser (L) operates in two different polarization modes, DE and TM. Polarization converter (PC) converts linear polarized radiation from the laser in one plane to one circular polarization orientation (left or right) in one direction of transmission, and then converts the opposite circular polarized radiation orientation back to linear polarization in the other direction of transmission. The laser switches between modes according to the magnetic orientation of the medium which is determined by the reflected light. Loss control element (LC) selectively increases the TE losses in the extended laser cavity. The self-coupling laser's operation in either the TE or TM mode depends on the differential absorption by the media of right (RCP) or left (LCP) handed circularly polarized beams.
    • 一种磁光回放装置,其从记录层(RL)回放信息,该记录层表现出从激光(L)发射的左右圆偏振光束的不同光吸收。 激光器(L)工作在两种不同的偏振模式DE和TM。 偏振转换器(PC)将一个平面中的激光器的线偏振辐射转换成一个透射方向的一个圆偏振取向(左或右),然后将相反的圆偏振辐射方向转换回另一个传输方向的线偏振 。 激光器根据由反射光确定的介质的磁方向在模式之间切换。 损耗控制元件(LC)选择性地增加了扩展激光腔中的TE损耗。 自耦合激光器在TE或TM模式下的操作取决于右(RCP)或左(LCP)旋转圆偏振光束的介质的差分吸收。
    • 6. 发明授权
    • Magneto-optic readout method and apparatus using polarization switching
of readout beam
    • 使用读出光束偏振切换的磁光读出方法和装置
    • US5235570A
    • 1993-08-10
    • US888239
    • 1992-05-22
    • Clark N. KurtzJoseph J. Miceli, Jr.
    • Clark N. KurtzJoseph J. Miceli, Jr.
    • G11B7/125G11B7/135G11B11/105
    • G11B11/10515G11B11/10545G11B7/125G11B7/1365
    • A method and apparatus for recovering information prerecorded in a vertically magnetized magneto-optic recording element wherein a laser is operated in a state of polarization instability (i.e., its TE and TM losses are equal). The linearly polarized (TE and TM) output of the laser is converted to circularly polarized (left-handed and right-handed) polarized radiation, and the latter is used to scan irradiate the recording element. Upon being reflected by the recording element, the circularly polarized radiation is reconverted to linear polarization and fed back to the laser cavity. Depending on which polarization mode (TE or TM) experiences the lesser loss as a result of the MCD effect, the laser operates in either its TE or TM mode. Means are provided for detecting the instantaneous polarization mode of the laser which, in turn, is indicative of the orientation (up/down) of the magnetic domains scanned by the laser radiation. Being dependent on a media-produced differential absorption of left-handed and right-handed circularly polarized radiation, the polarization switching scheme of the invention is advantageous vis-a-vis similar schemes which rely on small angular changes in the plane of polarization of the reflected beam.
    • 一种用于恢复预记录在垂直磁化的磁光记录元件中的信息的方法和装置,其中激光器以偏振不稳定的状态(即,其TE和TM损耗相等)操作。 激光的线偏振(TE和TM)输出被转换为圆偏振(左旋和右旋)偏振辐射,后者用于扫描照射记录元件。 当被记录元件反射时,圆偏振辐射再转换成线偏振并反馈到激光腔。 根据哪种偏振模式(TE或TM)由于MCD效应而经历较小的损耗,激光器以其TE或TM模式工作。 提供了用于检测激光器的瞬时偏振模式的装置,其又指示由激光辐射扫描的磁畴的取向(上/下)。 由于依赖于介质产生的左旋和右旋圆偏振辐射的差分吸收,本发明的偏振切换方案相对于依赖于偏振平面中的小角度变化的类似方案是有利的 反射光束。
    • 8. 发明授权
    • Electrographic imaging apparatus and method
    • 电摄影成像装置及方法
    • US4143962A
    • 1979-03-13
    • US805216
    • 1977-06-09
    • Clark N. Kurtz
    • Clark N. Kurtz
    • G03G15/08G03G15/10
    • G03G15/0803
    • Apparatus and method for imagewise controlling the flow of ions from a source toward an electrostatic image-bearing member utilize a predeterminedly electrically-biased slit means located between the ion source and the member. A portion of the slit means is maintained at a potential intermediate the image and background portions of the electrostatic image and so that ion flow toward the member is controlled in accordance with the image thereon. A substantially neutrally-charged mist is introduced between the slit means and the image-bearing member and charged and attracted to the member in accordance with the image.
    • 用于成像地控制离子源从静电图像承载部件流动的装置和方法利用位于离子源和部件之间的预定电偏压狭缝装置。 狭缝装置的一部分保持在静电图像的图像和背景部分的中间的电位,并且根据其上的图像来控制朝向构件的离子流。 在狭缝装置和图像承载部件之间引入基本中性充电的雾,并根据图像被充电并吸引到构件。