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    • 1. 发明授权
    • Laser beam scanner and its fabricating method
    • 激光束扫描器及其制造方法
    • US4957336A
    • 1990-09-18
    • US269412
    • 1988-11-10
    • Shin-ya HasegawaMasayuki KatoFumio YamagishiHiroyuki IkedaTakefumi Inagaki
    • Shin-ya HasegawaMasayuki KatoFumio YamagishiHiroyuki IkedaTakefumi Inagaki
    • G02B26/10
    • G02B26/106Y10S359/90
    • A high precision laser beam scanner is provided which is able to shape a beam generated by a laser, suppress the influence of jitter of a scanning beam due to mode hopping of a semiconductor laser, and reduce aberration of the scanning beam. A beam source generates a semiconductor laser beam, which is diffracted by a rotary hologram, forming a scanning beam on a surface to be scanned. An aberration correcting stationary hologram is disposed between the beam source and the rotary hologram. The stationary hologram is constructed with an object wave and a reference wave, which interfere on a stationary hologram substrate subject so that an aberration of the scanning beam on the surface to be scanned shall be corrected. The object wave is a spherical wave which has an aberration, a wave length shorter than that of the semiconductor laser beam, and an incident angle which is not vertical but is inclined with respect to the stationary hologram substrate. A method for fabricating the laser beam scanner is also provided.
    • 提供了能够对由激光产生的光束进行成形的高精度激光束扫描器,抑制由于半导体激光器的跳跃而导致的扫描光束的抖动的影响,并且减小扫描光束的像差。 光束源产生通过旋转全息图衍射的半导体激光束,在要扫描的表面上形成扫描光束。 像差校正固定全息图设置在光束源和旋转全息图之间。 固定全息图由对象波和参考波构成,其干涉固定的全息图基板对象,使得要扫描的表面上的扫描光束的像差被校正。 对象波是具有像差,波长短于半导体激光束的像差的球面波,并且不是垂直但相对于静止全息图基板倾斜的入射角。 还提供了一种用于制造激光束扫描器的方法。
    • 10. 发明授权
    • Fan system and electronic device
    • 风扇系统和电子设备
    • US08724320B2
    • 2014-05-13
    • US13013840
    • 2011-01-26
    • George HarlanMasayuki KatoHideyuki TakemotoMasamune Hiraki
    • George HarlanMasayuki KatoHideyuki TakemotoMasamune Hiraki
    • H05K7/20
    • F04D25/166F04D27/004F04D29/582
    • A fan system includes a pulse signal generation portion and a plurality of fans. Each of the plurality of fans preferably includes a motor portion; an impeller arranged to be rotated by the motor portion; a drive circuit arranged to drive the motor portion; a rotation detection portion arranged to detect rotation of the motor portion; and a rotation rate control circuit arranged to, based on a reference pulse signal supplied from the pulse signal generation portion and an actual rotation pulse signal supplied from the rotation detection portion, exercise feedback control on a rotation rate of the motor portion in accordance with a period of the reference pulse signal.
    • 风扇系统包括脉冲信号产生部分和多个风扇。 多个风扇中的每一个优选地包括马达部分; 叶轮,布置成由马达部分旋转; 布置成驱动电机部分的驱动电路; 旋转检测部,被配置为检测所述电动机部的旋转; 以及旋转速度控制电路,其被配置为基于从所述脉冲信号生成部提供的基准脉冲信号和从所述旋转检测部提供的实际旋转脉冲信号,根据所述旋转速度控制电路对所述马达部的旋转速度进行运动反馈控制 参考脉冲信号的周期。