公开(公告)号：US5812250A

公开(公告)日：1998-09-22

申请号：US886531

申请日：1997-07-01

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 ,  G01P21/02 ,  H03L7/14 ,  G01R19/00

CPC分类号： G01P3/366 ,  G01P21/02

摘要： A Doppler velocimeter determines a state of noise generation in a detection signal including a Doppler signal component based on comparison by a preceding/succeeding-signal comparator for comparing the detection signals before and after passing through a band-pass filter for cutting noise adjusted to the frequency of the detection signal, and/or includes a filter circuit for determining passage/interruption of the detection signal after passing through the band-pass filter from a relationship between the count value of a first counter, in which the output of a first frequency multiplier for multiplying the frequency of the detection signal by N is made to be a clock signal and a leading edge in the detection signal is made to be a reset trigger, and a leading edge in the detection signal, and/or includes an error signal generator for generating an error detection signal by detecting a periodic error in the detection signal after passing through the band-pass filter from a relationship between the count value of a second counter, in which the output of a second frequency multiplier for multiplying the frequency of the detection signal by N and a leading edge in the detection signal is made to be a reset trigger, and a leading edge in the detection signal after passing through the band-pass filter, and/or includes a phase comparator for generating a control signal by comparing the phase of the detection signal with the phase of a comparison signal to be compared, an oscillator for controlling the frequency of its output signal in accordance with the control signal from the phase comparator, and a comparison-signal generation unit for generating a comparison signal based on the output of the oscillator. When an error has been detected, a switching unit interrupts the control signal and the phase comparator is reset and stops comparison, and when the error has ended, the switching unit communicates the control signal, the phase comparator starts comparison, and the comparison-signal generation unit generates a comparison signal whose phase coincides with the phase of the detection signal.

公开(公告)号：US5502466A

公开(公告)日：1996-03-26

申请号：US266740

申请日：1994-06-28

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

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

IPC分类号： G01P3/36 ,  G01P5/26 ,  G01S17/06 ,  G01S17/58 ,  G01B9/02

CPC分类号： G01S17/58 ,  G01P3/366 ,  G01P5/26 ,  G01S17/06

摘要： A position information detection apparatus includes a first detection system for radiating two collimated light beams onto an object to be measured at a predetermined crossing angle to form interference fringes at a predetermined interval, and detecting scattered light emanating from the object to be measured by the interference fringes at the predetermined interval, a second detection system for radiating two light beams onto the object to be measured at a predetermined crossing angle to form interference fringes having a gradient with each other in an opposing direction to the object to be measured, and detecting scattered light emanating from the object to be measured by the interference fringes having the gradient, and a detection unit for comparing output signals from the first and second detection systems, and detecting relative position information, along the opposing direction of the first and second detection systems, of the object to be measured.

摘要翻译： 位置信息检测装置包括：第一检测系统，用于以预定的交叉角将两个准直光束照射到被测量物体上以形成预定间隔的干涉条纹;以及检测由待干扰物体发出的散射光 以预定间隔的条纹，用于以预定交叉角将两束光束照射到待测量物体上的第二检测系统，以形成在与被测量物体相反的方向上彼此具有梯度的干涉条纹，并且检测散射 通过具有梯度的干涉条纹从被测量物体发出的光;以及检测单元，用于比较来自第一和第二检测系统的输出信号，并且沿第一和第二检测系统的相对方向检测相对位置信息， 的待测物体。

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：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：US5796470A

公开(公告)日：1998-08-18

申请号：US607115

申请日：1996-02-26

申请人： Shinji Ueda ,  Hidejiro Kadowaki ,  Makoto Takamiya ,  Shigeki Kato

发明人： Shinji Ueda ,  Hidejiro Kadowaki ,  Makoto Takamiya ,  Shigeki Kato

IPC分类号： G01P3/36 ,  G01S7/481 ,  G01S17/58 ,  G02F1/03 ,  G02F1/35

CPC分类号： G01P3/366 ,  G01S17/58 ,  G01S7/4812 ,  G02F1/0327

摘要： Disclosed is a frequency shifter for shifting a frequency of incident light beams. The frequency shifter has an electro-optic element for making incident the light beam whose frequency is to be shifted, an electrode unit disposed on the electro-optic element, an electric charge imparting circuit for imparting an electric charge to the electrode unit and a discharging circuit for discharging the electric charges accumulated in the electrode unit. Disclosed also is an apparatus, having the frequency shifter, for optically measuring relative displacement data to a measured object.

摘要翻译： 公开了一种用于移动入射光束的频率的移频器。 变频器具有用于入射频率要移动的光束的电光元件，设置在电光元件上的电极单元，用于向电极单元施加电荷的电荷施加电路和放电 用于放电积聚在电极单元中的电荷的电路。 还公开了一种具有变频器的用于将测量对象的相对位移数据光学测量的装置。

公开(公告)号：US06631047B2

公开(公告)日：2003-10-07

申请号：US09156491

申请日：1998-09-18

申请人： Kou Ishizuka ,  Hidejiro Kadowaki ,  Naoki Kawamata ,  Hiroyuki Hagiwara ,  Makoto Takamiya ,  Shigeki Kato ,  Hiroyuki Shiomi

发明人： Kou Ishizuka ,  Hidejiro Kadowaki ,  Naoki Kawamata ,  Hiroyuki Hagiwara ,  Makoto Takamiya ,  Shigeki Kato ,  Hiroyuki Shiomi

IPC分类号： G11B5596

CPC分类号： G11B5/59677

摘要： 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.

摘要翻译： 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。

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：US07554671B2

公开(公告)日：2009-06-30

申请号：US11459861

申请日：2006-07-25

申请人： Hidejiro Kadowaki ,  Ko Ishizuka ,  Shigeki Kato

发明人： Hidejiro Kadowaki ,  Ko Ishizuka ,  Shigeki Kato

IPC分类号： G01B11/02

CPC分类号： G01B9/02012 ,  G01B9/02007 ,  G01B9/02018 ,  G01B9/0209 ,  G01B2290/45 ,  G01B2290/70

摘要： A first beam having high coherence and a second beam having low coherence and having a central wavelength difference from that of the first beam are multiplexed onto the same optical axis. First and second multiplexed beams obtained by beam splitting are emitted at a measurement reflection plane and a reference plane, respectively. The reflected first and second multiplexed beams are multiplexed and interfere with each other. The interference generates a first interference signal that is obtained from the first beams at the interference unit and that relates to information on the distance to the measurement reflection plane and a second interference signal that is obtained from the second beams. The first and second interference signals are used to carry out calculations for determining the position of a measurement origin for the measurement reflection plane.

摘要翻译： 具有高相干性的第一光束和具有低相干性并且具有与第一光束的中心波长不同的第二光束被复用到同一光轴上。 通过分束获得的第一和第二多路复用波束分别在测量反射平面和参考平面处发射。 反射的第一和第二多路复用波束被多路复用并彼此干扰。 干扰产生从干扰单元的第一波束获得的第一干扰信号，其涉及到与测量反射平面的距离的信息和从第二波束获得的第二干扰信号。 第一和第二干涉信号用于执行用于确定测量反射平面的测量原点的位置的计算。

公开(公告)号：US20070024863A1

公开(公告)日：2007-02-01

申请号：US11459861

申请日：2006-07-25

申请人： Hidejiro Kadowaki ,  Ko Ishizuka ,  Shigeki Kato

发明人： Hidejiro Kadowaki ,  Ko Ishizuka ,  Shigeki Kato

IPC分类号： G01B11/02

CPC分类号： G01B9/02012 ,  G01B9/02007 ,  G01B9/02018 ,  G01B9/0209 ,  G01B2290/45 ,  G01B2290/70

摘要： A first beam having high coherence and a second beam having low coherence and having a central wavelength difference from that of the first beam are multiplexed onto the same optical axis. First and second multiplexed beams obtained by beam splitting are emitted at a measurement reflection plane and a reference plane, respectively. The reflected first and second multiplexed beams are multiplexed and interfere with each other. The interference generates a first interference signal that is obtained from the first beams at the interference unit and that relates to information on the distance to the measurement reflection plane and a second interference signal that is obtained from the second beams. The first and second interference signals are used to carry out calculations for determining the position of a measurement origin for the measurement reflection plane.

摘要翻译： 具有高相干性的第一光束和具有低相干性并且具有与第一光束的中心波长不同的第二光束被复用到同一光轴上。 通过分束获得的第一和第二多路复用波束分别在测量反射平面和参考平面处发射。 反射的第一和第二多路复用波束被多路复用并彼此干扰。 干扰产生从干扰单元的第一波束获得的第一干扰信号，其涉及到与测量反射平面的距离的信息和从第二波束获得的第二干扰信号。 第一和第二干涉信号用于执行用于确定测量反射平面的测量原点的位置的计算。

公开(公告)号：US06473184B1

公开(公告)日：2002-10-29

申请号：US09562434

申请日：2000-05-01

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： G01B902

CPC分类号： G01B9/02081 ,  G01B9/02057 ,  G01B2290/30 ,  G01B2290/45 ,  G01B2290/70

摘要： An interferometer has a semiconductor laser which oscillates in multiple modes, an optical member for providing a beam from the semiconductor laser with a substantial optical path difference between optical paths partially in one beam, and an interference optical system for causing interference, using the beam having traveled via the optical member.

摘要翻译： 干涉仪具有以多个模式振荡的半导体激光器，用于提供来自半导体激光器的光束的光学部件在一个光束中部分地在光路之间具有实质光程差的光学部件和用于引起干涉的干涉光学系统，使用具有 通过光学构件行进。