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    • 1. 发明授权
    • Split phase high performance, high frequency, high dynamic range
interferometer
    • 分相高性能,高频,高动态范围干涉仪
    • US5999261A
    • 1999-12-07
    • US113668
    • 1998-07-10
    • Jason L. PresseskyYuh-Jen Cheng
    • Jason L. PresseskyYuh-Jen Cheng
    • G01B9/02
    • G01B9/0207G01B9/02011G01B9/02081G01B2290/45G01B2290/70
    • Processing two interference signals to reconstruct a target image includes splitting a laser beam into a reference beam and a measurement beam, and in turn splitting the reference beam into two sub-reference beams. A phase shift is introduced into one of the sub-reference beams, the phase shift being substantially 90 degrees. A measurement beam is reflected from a surface of a moving target, and split into two sub-measurement beams. A first respective sub-reference beam is combined with a first sub-measurement beam, and the second sub-reference beam is combined with the second sub-measurement beam, and the in phase and out of phase signals reconstruct the target surface. Adjustment of the split sub-reference beams is effected by Pockels cells to achieve the desired phase difference between the two sub-reference beams. The reconstructed motion of the target surface is effected with a selected frequency characteristic, spatial resolution and range characteristic.
    • 处理两个干扰信号以重建目标图像包括将激光束分成参考光束和测量光束,然后将参考光束分成两个子参考光束。 相移被引入到一个子参考光束中,相移基本上为90度。 测量光束从移动目标的表面反射,并分成两个子测量光束。 第一相应的子参考光束与第一子测量光束组合,并且第二子参考光束与第二子测量光束组合,同相和异相信号重构目标表面。 分裂子参考光束的调整由Pockels单元实现,以实现两个子参考光束之间的期望的相位差。 目标表面的重建运动是用选定的频率特性,空间分辨率和范围特性来实现的。
    • 6. 发明授权
    • Media contact zone with bell-shaped texturing features
    • 具有钟形纹理特征的介质接触区
    • US06663938B1
    • 2003-12-16
    • US09210018
    • 1998-12-11
    • Wei H. YaoYuh-Jen ChengLi-Ping WangDavid S. KuoChiao-Ping KuBruno Marchon
    • Wei H. YaoYuh-Jen ChengLi-Ping WangDavid S. KuoChiao-Ping KuBruno Marchon
    • G11B582
    • G11B5/82G11B5/6005G11B23/0021Y10T428/24355
    • A magnetic data recording medium substrate has a contact zone and a data zone. The contact zone is textured by forming multiple texturing features, each having a bell-shaped profile resembling a Gaussian curve. The features preferably are formed by pulsed laser energy applied to a glass substrate, or to an aluminum nickel-phosphorous substrate coated with a glass layer. As compared to previous laser texturing approaches, the laser beam is less narrowly focused to provide a beam impingement area with a diameter of at least three microns, forming texturing features with diameters of at least three microns. The texturing features preferably are uniform in height and diameter, and may be symmetrical or have asymmetrical aspects, so long as bell-shaped profiles are present in the direction of travel of the recording medium, relative to transducing heads.
    • 磁数据记录介质基板具有接触区和数据区。 通过形成多个纹理特征来形成接触区域,每个具有类似于高斯曲线的钟形轮廓。 特征优选通过施加到玻璃基板的脉冲激光能量或涂覆有玻璃层的铝镍磷基板形成。 与以前的激光纹理方法相比,激光束的聚焦较少,以提供直径至少为三微米的光束冲击区域,形成具有至少三微米直径的纹理特征。 纹理特征优选地在高度和直径上是均匀的,并且可以是对称的或具有不对称的方面,只要钟形轮廓相对于换能头在记录介质的行进方向上存在。
    • 9. 发明授权
    • Optical amplifier spectral tilt controllers
    • 光放大器光谱倾斜控制器
    • US06483631B1
    • 2002-11-19
    • US09900137
    • 2001-07-09
    • Yuh-Jen ChengRene H. Monnard
    • Yuh-Jen ChengRene H. Monnard
    • H01S300
    • H04B10/2941H01S3/06754H01S3/1301H01S3/1305
    • Spectral tilt controllers are provided for optical amplifiers and other optical network equipment used in fiber-optic communications links in fiber-optic networks. The tilt controllers may be used to adjust the gain or output power spectrum of an optical amplifier or to modify the optical data signal spectrum in other optical network equipment. Tilt controllers may use mechanical actuators to position a filter element substrate relative to an optical beam. Dielectric filters or other filter arrangements having various different spectral tilt characteristics may be implemented on the same substrate. Spectral tilt and average spectral attenuation values may be adjusted using the tilt controllers if desired.
    • 光纤倾斜控制器适用于光纤放大器和光纤网络光纤通信链路中使用的其他光网络设备。 倾斜控制器可以用于调整光放大器的增益或输出功率谱或修改其他光网络设备中的光数据信号频谱。 倾斜控制器可以使用机械致动器来相对于光束定位过滤器元件基板。 具有各种不同光谱倾斜特性的介质滤波器或其它滤波器装置可以在相同的基板上实现。 如果需要,可以使用倾斜控制器来调整光谱倾斜和平均光谱衰减值。