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    • 4. 发明授权
    • Doppler velocimeter having a diffraction grating and dual lens groups
with identical focal distances
    • 具有衍射光栅的多普勒测速仪和具有相同焦距的双透镜组
    • US5256885A
    • 1993-10-26
    • US997129
    • 1992-12-24
    • Makoto TakamiyaHidejiro KadowakiYasuhiko IshidaHiroshi Sugiyama
    • Makoto TakamiyaHidejiro KadowakiYasuhiko IshidaHiroshi Sugiyama
    • G01S17/58G01V9/04
    • G01S17/58
    • An apparatus for detecting the velocity information of an object comprises a light source; optical system for irradiating beam from the light source, which is provided with a first lens or lens group and a second lens or lens group having an identical focal distance which are arranged apart from each other substantially two times such focal distance along the direction of the optical axis, to irradiate the beam onto the measuring object through the first and second lenses or lens group, and the optical system being arranged so as to make the value of sin .theta./.lambda. substantially constant where .theta. is the incident angle of the beam irradiated onto the measuring object and .lambda. is the wavelength of the beam; and detector for detecting the scattering rays of light from the measuring object irradiated by the above-mentioned optical system to detect the velocity information of the measuring object. With the constituents thus arranged, the apparatus is capable of effectively preventing the deviation of the intersecting position of the beams irradiated on the measuring object to perform a high-precision detection of the velocity information at all times.
    • 用于检测物体的速度信息的装置包括光源; 用于照射来自光源的光束的光学系统,其具有第一透镜或透镜组以及具有相同焦距的第二透镜或透镜组,所述第二透镜或透镜组沿着 通过第一和第二透镜或透镜组将光束照射到测量对象上,并且光学系统被布置为使得sinθ/λ的值基本上恒定,其中θ是辐射束的入射角 到测量对象上,λ是光束的波长; 以及检测器,用于检测由上述光学系统照射的测量对象的光的散射光线,以检测测量对象的速度信息。 通过这样配置,能够有效地防止照射在测定对象上的光束的交叉位置的偏差始终进行速度信息的高精度检测。
    • 10. 发明授权
    • Interference device, position detecting device, positioning device and information recording apparatus using the same
    • 干涉装置,位置检测装置,定位装置及使用该装置的信息记录装置
    • US06631047B2
    • 2003-10-07
    • US09156491
    • 1998-09-18
    • Kou IshizukaHidejiro KadowakiNaoki KawamataHiroyuki HagiwaraMakoto TakamiyaShigeki KatoHiroyuki Shiomi
    • Kou IshizukaHidejiro KadowakiNaoki KawamataHiroyuki HagiwaraMakoto TakamiyaShigeki KatoHiroyuki Shiomi
    • G11B5596
    • G11B5/59677
    • An apparatus having a first system for forming a composite light beam of two light beams to be made to interfere with each other, a splitting member for amplitude-splitting the composite light beam into three or more split light beams in the same area, and a second system for obtaining interference light beams of different phases from the plurality of split light beams. Also, an apparatus for effecting information recording on a hard disc drive device comprising an (i) optical system for splitting a light beam into two light beams, causing one of the two light beams to be condensed and reflected by the side of an arm for a recording reading head in the hard disc drive device, and superposing the condensed and reflected light beam on the other light beam to thereby obtain a composite light beam, (ii) a splitting member for amplitude-splitting the composite light beam into three or more split light beams in the same area, (iii) an optical member for obtaining interference light beams of different phases from the plurality of split light beams, (iv) light receiving elements for detecting respective ones of the interference light beams of different phases, (v) a control system for effecting the positioning of the arm on the basis of the result of the detection by each of the light receiving elements, and (vi) a signal writing-in system for writing a signal into a hard disc through the recording reading head each time the arm is positioned.
    • 一种具有第一系统的装置,用于形成要彼此干涉的两个光束的复合光束,用于将复合光束分解成同一区域中的三个或更多个分束光束的分束构件,以及 用于从多个分裂光束获得不同相位的干涉光束的第二系统。 另外,一种用于在硬盘驱动装置上进行信息记录的装置,包括:(i)用于将光束分成两束光束的光学系统,使得两个光束中的一个被臂的侧面冷凝和反射, 在所述硬盘驱动装置中的记录读取头,并且将所述聚光反射光束重叠在所述另一光束上,从而获得复合光束;(ii)用于将所述复合光束分解为三个以上的分割部件 在相同的区域中分割光束,(iii)用于从多个分裂光束获得不同相位的干涉光束的光学部件,(iv)用于检测不同相位的干涉光束的各个的光接收元件( v)用于根据每个光接收元件的检测结果来实现臂的定位的控制系统,以及(vi)用于写入信号的信号写入系统 每当手臂定位时,通过记录读取头进入硬盘。