公开(公告)号：US5216478A

公开(公告)日：1993-06-01

申请号：US839708

申请日：1992-02-24

申请人： Hidejiro Kadowaki ,  Ken Tsuchii ,  Makoto Takamiya ,  Kosuke Yamamoto ,  Masafumi Wataya ,  Toshiyuki Yanaka ,  Haruhiko Takahashi ,  Hiroshi Sugiyama ,  Yasuhiko Ishida

发明人： Hidejiro Kadowaki ,  Ken Tsuchii ,  Makoto Takamiya ,  Kosuke Yamamoto ,  Masafumi Wataya ,  Toshiyuki Yanaka ,  Haruhiko Takahashi ,  Hiroshi Sugiyama ,  Yasuhiko Ishida

IPC分类号： B41J2/125 ,  G01S7/481 ,  G01S17/58

CPC分类号： B41J2/125 ,  G01S17/58 ,  G01S7/4811 ,  B41J11/007 ,  B41J11/42

摘要： A Doppler velocity meter has a radiation source for emitting a radiation beam the wavelength of which fluctuates, such as a laser; an optical system for directing the radiation beam to an object at an incident angle .theta. and a detector for detecting scattered beam generated from the object by directing the radiation beam. The optical system has a diffraction grating which serves to change the incident angle .theta. in accordance with a change in the wavelength .lambda. of the radiation beam in such a manner as to maintain the value of sin .theta./.lambda. substantially constant. The velocity meter can accurately detect the velocity of movement of the object regardless of any change in the wavelength .lambda., because the diffraction grating serves to substantially compensate for any change in the frequency of the scattered beam caused by the change in the wavelength.

摘要翻译： 多普勒速度计具有用于发射其波长波动的辐射束的辐射源，例如激光; 用于将辐射束以入射角θ引导到物体的光学系统和用于通过引导辐射束来检测从物体产生的散射光束的检测器。 光学系统具有衍射光栅，其用于根据辐射束的波长λ的变化改变入射角θ，以保持sinθ/λ的值基本上恒定。 由于衍射光栅用于基本上补偿由波长变化引起的散射光束的频率的任何变化，所以速度计可以精确地检测物体的移动速度，而不管波长λ的任何变化。

公开(公告)号：US4903123A

公开(公告)日：1990-02-20

申请号：US204031

申请日：1988-06-08

申请人： Naoto Kawamura ,  Hidejiro Kadowaki

发明人： Naoto Kawamura ,  Hidejiro Kadowaki

IPC分类号： H04N1/405 ,  H04N1/52

CPC分类号： H04N1/4055 ,  H04N1/4058 ,  H04N1/52

摘要： There is disclosed an apparatus for processing a halftone image into a digital dot image. There are generated plural dots for the data of each pixel so as to form line screens in such a manner that smallest ones of the dots among the pixels constitute a line screen while other dots constitute line screens inclined to the scanning direction, in order to reduce Moire fringe pattern.

摘要翻译： 公开了一种将半色调图像处理成数字点图像的装置。 产生用于每个像素的数据的多个点，以便形成线屏幕，使得像素中最小的一个点构成行画面，而其他点构成与扫描方向倾斜的线屏幕，以便减少 莫尔条纹图案。

公开(公告)号：US07034947B2

公开(公告)日：2006-04-25

申请号：US10425680

申请日：2003-04-30

申请人： Ko Ishizuka ,  Hidejiro Kadowaki ,  Yasushi Kaneda ,  Shigeki Kato ,  Takayuki Kadoshima ,  Sakae Horyu

发明人： Ko Ishizuka ,  Hidejiro Kadowaki ,  Yasushi Kaneda ,  Shigeki Kato ,  Takayuki Kadoshima ,  Sakae Horyu

IPC分类号： G01B9/02

CPC分类号： G01B9/02081 ,  G01B9/02057 ,  G01B2290/30 ,  G01B2290/70 ,  G01D5/344

摘要： Interference measuring apparatus for detecting a plurality of different interference phase signals. The apparatus has a light dividing member for dividing linearly polarized light beams superposed one upon another into a plurality of light beams. The apparatus also includes a light transmitting member with a plurality of light passing portions having different light transmitting properties in conformity with the incidence positions of the plurality of light beams divided by the light dividing member. In addition, the apparatus has a polarizing plate to receive the plurality of light beams that passed through the light transmitting member.

摘要翻译： 用于检测多个不同干涉相位信号的干涉测量装置。 该装置具有用于将彼此重叠的线偏振光束分成多个光束的分光部件。 该装置还包括具有多个光通过部分的透光部件，其具有与由光分割部件分割的多个光束的入射位置一致的透光性能不同。 此外，该装置具有用于接收穿过透光构件的多个光束的偏振板。

公开(公告)号：US5737116A

公开(公告)日：1998-04-07

申请号：US640111

申请日：1996-04-30

申请人： Hidejiro Kadowaki ,  Makoto Takamiya ,  Shigeki Kato

发明人： Hidejiro Kadowaki ,  Makoto Takamiya ,  Shigeki Kato

IPC分类号： G01B11/00 ,  G01P3/36 ,  G01P5/00 ,  G01P5/26 ,  G01S7/481 ,  G01S17/58 ,  G02F1/03 ,  G02F2/02 ,  G02F1/35

CPC分类号： G02F1/0305 ,  G01P3/366 ,  G01P5/26 ,  G01S17/58 ,  G01S7/4812

摘要： A frequency shifter is capable of controlling the adverse influences of electric noise caused by the voltage applied to electrooptical elements of a frequency shifter. The frequency shifter modulates the phase of the luminous flux entering the electrooptical elements by applying a voltage to the electrooptical elements; the shifter is provided with a shield for electrically shielding the circuit for generating the voltage to be applied to the electrooptical elements and the electrooptical elements from an external circuit.

摘要翻译： 变频器能够控制由施加到移频器的电光元件的电压引起的电噪声的不利影响。 频移器通过向电光元件施加电压来调制进入电光元件的光通量的相位; 移位器设置有用于电屏蔽电路的屏蔽件，用于产生将被施加到电光元件的电压和来自外部电路的电光元件。

公开(公告)号：US5696578A

公开(公告)日：1997-12-09

申请号：US60533

申请日：1993-05-13

申请人： Yasuhiko Ishida ,  Hidejiro Kadowaki ,  Makoto Takamiya ,  Jun Ashiwa ,  Shigeki Kato ,  Shinji Ueda

发明人： Yasuhiko Ishida ,  Hidejiro Kadowaki ,  Makoto Takamiya ,  Jun Ashiwa ,  Shigeki Kato ,  Shinji Ueda

IPC分类号： G01P3/36 ,  G01S7/491 ,  G01S17/58 ,  H03B1/00

CPC分类号： G01S17/58 ,  G01P3/366 ,  G01S7/4917

摘要： This invention has as its object to provide a frequency tracking method, a frequency control apparatus (tracking apparatus) using this method, and a Doppler velocity meter using the same, which easily and quickly allow the center frequency of a band pass filter to coincide with the frequency of an input signal even when an input signal suffers from a large level drift. A tracking method for a center frequency of a band-pass filter relates to a method including the deviation information detection step of detecting deviation information of the frequency of a signal to be input to the band-pass filter or a signal output from the band-pass filter with respect to the center frequency of the band-pass filter, the deviation information detection step including at least the step of detecting the deviation direction, and the changing step of changing the center frequency of the band-pass filter on the basis of a detection result in the detection step of detecting the deviation information including the deviation direction, thereby adjusting the center frequency of the band-pass filter to coincide with the frequency of a signal to be filtered through the band-pass filter.

摘要翻译： 本发明的目的是提供一种频率跟踪方法，使用该方法的频率控制装置（跟踪装置）和使用该方法的多普勒速度计，其容易且快速地使带通滤波器的中心频率与 输入信号的频率即使当输入信号具有大的电平漂移时也是如此。 用于带通滤波器的中心频率的跟踪方法涉及一种方法，包括：偏差信息检测步骤，用于检测要输入到带通滤波器的信号的频率的偏差信息或从带通滤波器输出的信号， 相对于带通滤波器的中心频率的通过滤波器，偏差信息检测步骤至少包括检测偏差方向的步骤，以及基于带通滤波器的中心频率改变的改变步骤 在检测步骤中检测包括偏差方向的偏差信息，从而调节带通滤波器的中心频率与通过带通滤波器滤波的信号的频率一致的检测结果。

公开(公告)号：US5640239A

公开(公告)日：1997-06-17

申请号：US493539

申请日：1995-06-22

申请人： Makoto Takamiya ,  Hidejiro Kadowaki

发明人： Makoto Takamiya ,  Hidejiro Kadowaki

IPC分类号： G01D5/38 ,  G01B11/00 ,  G01P3/36 ,  G01P5/00 ,  G01S7/481 ,  G01S7/499 ,  G01S17/58 ,  G02F1/03 ,  G01B9/02

CPC分类号： G01P3/366 ,  G01S17/58 ,  G02F1/03 ,  G01S7/4811 ,  G01S7/499

摘要： There is disclosed an optical device having an electrooptic crystal on which a light beam is to be incident, and electrodes for applying a predetermined voltage to the electrooptic crystal.The electrooptic crystal is disposed in an optical system in which the angles of light rays in the light beam temporally or spatially change, and the electrodes are disposed, so that its voltage application direction is parallel to both the optic axis of the electrooptic crystal and the direction of polarization of the light beam incident on the electrooptic crystal, or is parallel to one of the optic axis and the direction of polarization and is perpendicular to the other.

摘要翻译： 公开了具有电光晶体入射的电光晶体的光学器件，以及向电光晶体施加预定电压的电极。 电光晶体设置在光学系统中，其中光束中的光线的时间或空间上的角度改变，并且电极被布置，使得其电压施加方向平行于电光晶体的光轴和 入射到电光晶体上的光束的偏振方向，或者平行于光轴和偏振方向之一并且垂直于另一个。

公开(公告)号：US5629793A

公开(公告)日：1997-05-13

申请号：US499125

申请日：1995-07-07

申请人： Makoto Takamiya ,  Hidejiro Kadowaki

发明人： Makoto Takamiya ,  Hidejiro Kadowaki

IPC分类号： G01P3/36 ,  G01B11/00 ,  G01P5/00 ,  G01S7/481 ,  G01S7/491 ,  G01S17/58 ,  G01S17/87 ,  G02F1/03 ,  G02F1/23

CPC分类号： G01S17/58 ,  G01S7/4814 ,  G01S7/4911 ,  G02F1/0305 ,  G01S7/4917

摘要： A frequency shifter for modulating the frequency of an incident light beam is disclosed. This frequency shifter includes an electro-optic crystal portion to be arranged at an incident position, an electrode arranged on the electro-optic crystal portion, a voltage application unit for applying a voltage to the electro-optic crystal portion via the electrode, and a unit which is arranged at least at a portion of the electro-optic crystal portion to uniformize the temperature of the electro-optic crystal portion.

摘要翻译： 公开了一种用于调制入射光束的频率的移相器。 该移频器包括布置在入射位置的电光晶体部分，布置在电光晶体部分上的电极，经由电极向电光晶体部分施加电压的电压施加单元，以及 单元，其至少布置在电光晶体部分的一部分上，以使电光晶体部分的温度均匀化。

公开(公告)号：US5557407A

公开(公告)日：1996-09-17

申请号：US364782

申请日：1994-12-27

申请人： Makoto Takamiya ,  Hidejiro Kadowaki

发明人： Makoto Takamiya ,  Hidejiro Kadowaki

IPC分类号： G01P3/36 ,  G01P5/00 ,  G01P5/26 ,  G01S17/58 ,  G01B9/02

CPC分类号： G01P3/366 ,  G01P5/26 ,  G01S17/58

摘要： A speed measuring apparatus includes a light source unit for generating a diverged light beam, a diffraction grating for generating diffracted light when the diverged light beam from the light source unit is made to enter the diffraction grating, an optical device for converting the diffracted light into a collimated light beam, and an optical detecting device for receiving interference light formed by projecting the collimated light on the object to be measured. The speed measuring apparatus measures the speed of the object by using signals corresponding to the frequency shift of the light obtained by the optical detecting device.

摘要翻译： 速度测量装置包括用于产生发散光束的光源单元，当使来自光源单元的发散光束进入衍射光栅时产生衍射光的衍射光栅，用于将衍射光转换成 准直光束，以及用于接收通过将准直光投射在被测量物体上而形成的干涉光的光学检测装置。 速度测量装置通过使用与由光学检测装置获得的光的频移相对应的信号来测量物体的速度。

公开(公告)号：US5552879A

公开(公告)日：1996-09-03

申请号：US285529

申请日：1994-08-04

申请人： Makoto Takamiya ,  Hidejiro Kadowaki ,  Yasuhiko Ishida ,  Jun Ashiwa ,  Shigeki Kato ,  Shinji Ueda

发明人： Makoto Takamiya ,  Hidejiro Kadowaki ,  Yasuhiko Ishida ,  Jun Ashiwa ,  Shigeki Kato ,  Shinji Ueda

IPC分类号： G01P5/00 ,  G01P3/36 ,  G01S7/491 ,  G01S17/58

CPC分类号： G01P3/366 ,  G01S17/58 ,  G01S7/4812 ,  G01S7/4917

摘要： A Doppler velocimeter includes an illuminating system for projecting a light beam for measurement onto an object to be measured at a predetermined working distance, and a light-receiving system for receiving light from the object illuminated with the light beam by the illuminating system. Information relating to a speed of the object is detected by a Doppler shift of the light received by the light-receiving system. The Doppler velocimeter further includes a changing device for changing the working distance of the illuminating system.

摘要翻译： 一种多普勒测速仪包括：用于将预定光束进行测量的光束以预定的工作距离投射到被测量物体上的照明系统;以及用于接收来自被照明系统照射的物体的光的光接收系统。 通过由受光系统接收的光的多普勒频移来检测与物体的速度有关的信息。 多普勒测速仪还包括用于改变照明系统的工作距离的改变装置。

公开(公告)号：US5483332A

公开(公告)日：1996-01-09

申请号：US419746

申请日：1995-04-10

申请人： Makoto Takamiya ,  Jun Ashiwa ,  Hidejiro Kadowaki ,  Yasuhiko Ishida

发明人： Makoto Takamiya ,  Jun Ashiwa ,  Hidejiro Kadowaki ,  Yasuhiko Ishida

IPC分类号： G01F1/66 ,  G01P3/36 ,  G01P5/00 ,  G01P5/26 ,  G01S7/481 ,  G01S17/58

CPC分类号： G01P3/366 ,  G01P5/26 ,  G01S17/58 ,  G01S7/4812

摘要： A doppler velocimeter determines the velocity of an object moving through a beam intersection area by using a doppler frequency obtained by detecting light from the beam intersecting area. The doppler velocimeter includes: a light source; a diffraction grating for diffracting light received from the light source; first and second lens systems for transmitting diffracted light from the diffraction grating to irradiate a portion of a movable object to be examined, the first and second lens systems having the same focal length F; and a detector device for receiving light from the portion of the object irradiated with the light which has been transmitted through the first and second lens systems and for obtaining a doppler signal used for velocity determination. The interval between the first and second lens systems is twice as long as the focal length F. Spherical aberration caused by a portion of the first lens system through which the diffracted light travels is offset by spherical aberration caused by a portion of the second lens system through which the diffracted light travels. This simple construction achieves equidistant interference fringes over the beam intersection area.

摘要翻译： 多普勒速度计通过使用通过检测来自光束相交区域的光获得的多普勒频率来确定移动通过光束交叉区域的物体的速度。 多普勒测速仪包括：光源; 用于衍射从光源接收的光的衍射光栅; 第一和第二透镜系统，用于从衍射光栅发射衍射光以照射待检查的可移动物体的一部分，第一和第二透镜系统具有相同的焦距F; 以及检测器装置，用于接收来自已经透过第一和第二透镜系统的光照射的物体的部分的光，并且用于获得用于速度确定的多普勒信号。 第一透镜系统和第二透镜系统之间的间隔是焦距F的两倍。由衍射光穿过的第一透镜系统的一部分引起的球面像差由第二透镜系统的一部分引起的球面像差 衍射光通过其传播。 这种简单的结构在光束交叉区域上实现了等距离的干涉条纹。