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    • 2. 发明授权
    • Detection of phase and amplitude modulation information on optical
medium with a waveguide
    • 用波导检测光介质上的相位和幅度调制信息
    • US5444689A
    • 1995-08-22
    • US109904
    • 1993-08-23
    • Hiroshi OhkiRieko ArimotoYutaka IwasakiJun Iwasaki
    • Hiroshi OhkiRieko ArimotoYutaka IwasakiJun Iwasaki
    • G02B6/122G02B6/34G11B7/00G11B7/004G11B7/005G11B7/007G11B7/12G11B7/14G11B7/24G02B6/10
    • G11B7/14G11B7/0051G11B7/0052G11B7/124
    • An optical recording medium includes a substrate, first information for modulating a phase of read light radiated on the substrate, and second information for modulating an amplitude of the read light radiated on the substrate. The first information and the second information are arranged in parallel to each other on the substrate in a predetermined arrangement direction. A method and apparatus for performing reproduction using this medium are also disclosed. The method includes the step of radiating read light on the optical recording medium in which the first information for modulating the phase of the read light and the second information for modulating the amplitude of the read light are recorded, the step of receiving light through the optical recording medium, the detection step of independently detecting phase modulation information and amplitude modulation information of the optical recording medium using the received light, and the step of reproducing the first information and the second information from the information in the detection step.
    • 光记录介质包括基板,用于调制在基板上辐射的读取光的相位的第一信息,以及用于调制在基板上辐射的读取光的振幅的第二信息。 第一信息和第二信息在预定排列方向上在基板上彼此平行地布置。 还公开了使用该介质进行再现的方法和装置。 该方法包括在光记录介质上照射读取光的步骤,其中记录了用于调制读取光的相位的第一信息和用于调制读取光的振幅的第二信息,通过光学器件接收光的步骤 记录介质,使用所接收的光独立地检测所述光记录介质的相位调制信息和幅度调制信息的检测步骤,以及从所述检测步骤中的信息再现所述第一信息和所述第二信息的步骤。
    • 7. 发明授权
    • Microwave excited gas laser oscillator
    • 微波激发气体激光振荡器
    • US06259716B1
    • 2001-07-10
    • US09238634
    • 1999-01-28
    • Yutaka IwasakiShigeki Yamane
    • Yutaka IwasakiShigeki Yamane
    • H01S30975
    • H01S3/0975
    • In one discharge tube in which laser gas flows, a plurality of microwave generating units composed of microwave power sources, magnetrons and waveguides are disposed, and each magnetron oscillates intermittently by switching the drive of the microwave power source. A main controller provides a reference clock to a power source unit composed of the plurality of microwave power sources. By this reference clock, adjacent microwave power sources in the power source unit are switched and driven at a predetermined phase difference through a phase shifter. Accordingly, discharge interference in adjacent discharge areas is avoided, so that a stable laser beam output may be obtained.
    • 在激光气体流过的一个放电管中,设置由微波电源,磁控管和波导构成的多个微波发生单元,通过切换微波功率源的驱动,每个磁控管间歇地摆动。 主控制器为由多个微波功率源组成的电源单元提供参考时钟。 通过该参考时钟,电源单元中的相邻微波功率源通过移相器以预定的相位差被切换和驱动。 因此,避免了相邻放电区域的放电干扰,从而可以获得稳定的激光束输出。
    • 8. 发明授权
    • Minute step measuring method
    • 分钟步测量方法
    • US5694220A
    • 1997-12-02
    • US540455
    • 1995-10-10
    • Hiroshi OokiYutaka IwasakiJun Iwasaki
    • Hiroshi OokiYutaka IwasakiJun Iwasaki
    • G01B9/04G01B11/06G01B11/22G01B11/00
    • B82Y15/00G01B11/0608
    • A minute step measuring method comprises forming a laser spot on an object by condensing light from a laser light source, condensing light beams from the object on an end face of a double-mode waveguide, branching light propagating in the double-mode waveguide into two channel waveguides, detecting light beams emerging from the two channel waveguides, and measuring a minute step existing on the object, using a signal of a difference and a signal of a sum between two signals according to the two light beams detected, wherein measurement is conducted of a signal W.sub.a of the sum when the laser spot is located on one of two flat portions existing before and after the step, and of a signal W.sub.b of the sum when the laser spot is located on the other flat portion, and wherein the step is measured by correcting a difference between reflectivities of the two flat portions existing before and after the step in measuring the minute step, using the signals W.sub.a and W.sub.b.
    • 微步测量方法包括:通过聚焦来自激光光源的光来形成激光点,将来自物体的光束聚焦在双模波导的端面上,在双模波导中传播的分支光分成两个 检测从两个通道波导出射的光束,并根据检测到的两个光束,使用差分信号和两个信号之和的信号测量物体上存在的微小步长,其中进行测量 当激光光斑位于步骤之前和之后存在的两个平坦部分中的一个上的信号Wa和当激光光斑位于另一平坦部分上时的和的信号Wb,并且其中步骤 通过使用信号Wa和Wb来校正在测量微步中步骤之前和之后存在的两个平坦部分的反射率之间的差异来测量。
    • 9. 发明授权
    • Apparatus for observing a surface using polarized light
    • 使用偏振光观察表面的装置
    • US5764363A
    • 1998-06-09
    • US672331
    • 1996-06-28
    • Hiroshi OokiYutaka IwasakiJun IwasakiTsuneyuki Hagiwara
    • Hiroshi OokiYutaka IwasakiJun IwasakiTsuneyuki Hagiwara
    • G01B11/06G01N21/956G02B27/28G03F7/20G01J4/00
    • G03F7/70483G01B11/0608G01N21/956G02B27/28
    • An observation apparatus of the present comprises (i) a light source for generating light; (ii) a separating optical system which splits the light from the light source into two different polarized light beams; (iii) a condenser optical system which converges the two polarized light beams from the separating optical system so as to respectively form light spots on two different positions on a sample object; (iv) a polarization selecting means which has a predetermined analyzer angle and selects a specific polarized light component from composite light made of the two polarized light beams by way of the sample object; (v) light detecting means which detects the polarized light component selected by the polarization selecting means; and (vi) phase difference adjustment means which adjusts a phase difference between the two polarized light beams by way of the sample object and guides composite light composed of the two polarized light beams as circularly polarized light to the polarization selecting means, when the sample object does not modulate both phase and amplitude of the light incident thereon. Accordingly, this observation apparatus can detect a phase difference generated between the two light components respectively emitted from both side of a level difference on the sample object.
    • 本发明的观察装置包括:(i)用于产生光的光源; (ii)分离光学系统,其将来自光源的光分成两个不同的偏振光束; (iii)聚光器系统,其将来自分离光学系统的两个偏振光束会聚,以分别在样本物体上的两个不同位置上形成光点; (iv)偏振选择装置,其具有预定的分析器角度,并且通过样本对象从由两个偏振光束构成的复合光中选择特定偏振光分量; (v)光检测装置,其检测由偏振选择装置选择的偏振光分量; 以及(vi)相位差调整装置,当采样物体通过采样对象调节两个偏振光束之间的相位差并将由两个偏振光组成的复合光作为圆偏振光引导到偏振选择装置时, 不调制入射到其上的光的相位和幅度。 因此,该观察装置可以检测从样本物体的水平差两侧分别发射的两个光分量之间产生的相位差。
    • 10. 发明授权
    • Projection apparatus and method
    • 投影仪及方法
    • US5633755A
    • 1997-05-27
    • US611304
    • 1996-03-05
    • Yuji ManabeKazuya OkamotoYutaka IwasakiYukiharu Okubo
    • Yuji ManabeKazuya OkamotoYutaka IwasakiYukiharu Okubo
    • G02B26/08H04N5/74H04N9/31G03B21/28
    • H04N9/3108Y10S359/904
    • A projection apparatus is disclosed that can be used for projection TV and related applications. The apparatus comprises a light source, a projection optical system, a DMD with multiple micromirrors, and a controller for individually controlling the tilt of the micromirrors. The projection optical system comprises, in order from the DMD side, a first lens group, an aperture stop, and a second lens group. An illumination stop is situated between the first and second lens groups. Light from the light source passes through the illumination stop and the first lens group to impinge on the DMD. The controller coordinatedly controls the tilt of the micromirrors in the DMD so that the impinging light is selectively reflected to one or the other of the aperture stop and the illumination stop, thereby eliminating ghost-forming reflections of light not projected onto a screen.
    • 公开了可用于投影电视和相关应用的投影装置。 该装置包括光源,投影光学系统,具有多个微镜的DMD,以及用于单独控制微镜倾斜的控制器。 投影光学系统从DMD侧依次包括第一透镜组,孔径光阑和第二透镜组。 照明停止位于第一和第二透镜组之间。 来自光源的光通过照明停止和第一透镜组撞击在DMD上。 控制器协调地控制DMD中的微镜的倾斜,使得入射光被选择性地反射到孔径光阑和照明停止中的一个或另一个,从而消除未投射到屏幕上的光的重影形成反射。