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    • 3. 发明授权
    • Integral pickup for an optical digital disc using saw deflection and
lenses
    • 使用锯偏转和透镜的光学数字光盘的整体拾取
    • US4747090A
    • 1988-05-24
    • US559050
    • 1983-10-13
    • Tsukasa YamashitaNobuhisa InoueKazuhiko MoriMasaharu MatanoIsao Taguchi
    • Tsukasa YamashitaNobuhisa InoueKazuhiko MoriMasaharu MatanoIsao Taguchi
    • G11B7/085G11B7/09G11B7/12G11B7/135G02B6/12
    • G11B7/0917G11B7/08547G11B7/1245
    • A photo-pickup wherein a light emitting portion, a surface acoustic wave generating portion, a lens portion, a light receiving portion and a control portion are integrally integrated on a base plate formed on its surface with a light transmission path. The light emitting portion propagates a light beam to the light transmission path. The light beam propagating in the light transmission path is first deflected within a plane of the light transmission path by surface acoustic wave propagating on the light transmission path and propagated towards the lens portion. The lens portion is provided to project the light beram outside from the light transmission path and effect two-dimentional focusing of the projected beam and adjustment of focal position. The light receiving portion comprises a combination of a plurality of light receiving elements disposed at suitable intervals from the projected position of the light beam to receive a reflected light of the light beam. The control portion is provided to receive an output of the light receiving portion to process a signal and supply said control signal to the surface acoustic wave generating portion and lens portion, thereby effecting the control of deflection angle of the light beam, two-dimentional focusing of the projected beam and control of focal position.
    • 其中发光部分,表面声波发生部分,透镜部分,光接收部分和控制部分的光拾取器一体地集成在其表面上形成的基板上,具有光传输路径。 发光部将光束传播到光传输路径。 在光传输路径中传播的光束首先在光传输路径的平面内通过在光传输路径上传播并在透镜部分传播的表面声波而偏转。 透镜部分被设置成将光束从光传播路径向外突出,并且实现投影光束的二维聚焦和焦点位置的调整。 光接收部分包括多个光接收元件的组合,多个光接收元件以与光束的投影位置适当的间隔设置以接收光束的反射光。 控制部被设置为接收光接收部分的输出以处理信号并将所述控制信号提供给表面声波产生部分和透镜部分,从而实现光束偏转角的控制,二维聚焦 的投影光束和焦点位置的控制。
    • 6. 发明授权
    • Device and method for comparing optical signals
    • 用于比较光信号的装置和方法
    • US4604707A
    • 1986-08-05
    • US471728
    • 1983-03-03
    • Tsukasa YamashitaNobuhisa InoueKazuhiko MoriMasaharu Matano
    • Tsukasa YamashitaNobuhisa InoueKazuhiko MoriMasaharu Matano
    • G02F1/335G06E1/02G06G9/00
    • G02F1/335G06E1/02
    • An optical comparator for comparing, bit by bit, corresponding bits of two optical digital signals which are identical in the number of constituent optical bit signals, includes an optical waveguide layer made of an acousto-optical material. A surface acoustic wave generator generates a surface acoustic wave propagating on the waveguide layer, and a photocoupler directs the constituent bit signals to be of the two optical digital signals incident on the waveguide layer so as to satisfy the Bragg diffraction condition with respect to the surface acoustic wave propagating on the waveguide layer. A photosensor detects diffracted light and/or undiffracted light which has passed through a surface acoustic wave interaction region. The position of the generator and/or the surface acoustic wave generating timing is so determined that initiation or cessation of the interaction of the surface acoustic wave with a bit of one of the optical digital signals is simultaneous with initiation or cessation of the wave interaction with a corresponding bit of the other optical bit signal.
    • 用于比较各组成光位信号数目相同的两个光数字信号的相应位的光比较器包括由声光材料制成的光波导层。 表面声波发生器产生在波导层上传播的表面声波,光耦合器将入射在波导层上的两个光数字信号的构成位信号引导为相对于表面满足布拉格衍射条件 在波导层上传播的声波。 光传感器检测已经通过表面声波相互作用区域的衍射光和/或未衍射光。 发电机和/或表面声波产生定时的位置被确定为表面声波与光学数字信号之一的位的相互作用的启动或停止与波形相互作用的起始或停止同时发生 另一个光学位信号的相应位。