公开(公告)号：US4812987A

公开(公告)日：1989-03-14

申请号：US795231

申请日：1985-11-05

申请人： Chiaki Yamawaki ,  Taizo Sasada ,  Tetsuo Iwaki ,  Katsubumi Koyanagi

发明人： Chiaki Yamawaki ,  Taizo Sasada ,  Tetsuo Iwaki ,  Katsubumi Koyanagi

IPC分类号： G11B20/10 ,  G11B20/14 ,  G11B20/22 ,  G06F7/38 ,  H03B1/00

CPC分类号： G11B20/10009 ,  G11B20/10527 ,  G11B20/1426

摘要： A wave shaping circuit includes a digital sampling circuit for sampling an input signal and producing a digital signal. The sampled signal is detected by a sign detector for detecting whether it is positive or negative. A unit difference generator is provided for generating a unit difference which is equal to a difference increased, during one sampling cycle, in a positive or negative direction as detected by the sign detector. A register is provided for storing a summed difference obtained in the previous sampling cycle. The summed difference is multiplied by a predetermined coefficient which is between 0 and 1 so that the product changes exponentially. A first adder is provided for adding the summed difference multiplied by the coefficient with the unit difference. The added result is stored in the register. A second adder is provided for adding the sampled input signal with the summed signal stored in the register, and producing a corrected signal.

摘要翻译： 波形整形电路包括用于对输入信号进行采样并产生数字信号的数字采样电路。 采样信号由符号检测器检测，用于检测其是正还是负。 提供了一个单位差分发生器，用于产生一个单位差值，该单位差值等于在一个采样周期期间在由符号检测器检测到的正或负方向上增加的差值。 提供了一个寄存器，用于存储在先前采样周期中获得的总和差。 将总和差乘以0和1之间的预定系数，使得乘积呈指数变化。 第一加法器用于将乘以系数的求和差与单位差相加。 添加的结果存储在寄存器中。 提供第二加法器，用于将采样的输入信号与存储在寄存器中的求和信号相加，并产生校正信号。

公开(公告)号：US5517369A

公开(公告)日：1996-05-14

申请号：US348161

申请日：1994-11-28

申请人： Hitoshi Takeuchi ,  Eiji Yamada ,  Chiaki Yamawaki ,  Tetsuo Iwaki

发明人： Hitoshi Takeuchi ,  Eiji Yamada ,  Chiaki Yamawaki ,  Tetsuo Iwaki

IPC分类号： G11B5/00 ,  G11B5/008 ,  G11B5/02 ,  G11B5/035 ,  G11B5/09 ,  G11B5/39 ,  G11B5/49 ,  G11B15/02 ,  G11B15/12

CPC分类号： G11B5/3961 ,  G11B15/02 ,  G11B15/12 ,  G11B5/02 ,  G11B5/035 ,  G11B5/09 ,  G11B5/4992 ,  G11B2005/0016 ,  G11B5/00813

摘要： In a multi-track magnetic signal reproducing apparatus, a plurality of MR heads including MR (Magneto Resistance Effect) elements are provided correspondingly to tracks on a magnetic tape. At the time of reproduction, constant current from a constant current power supply is sequentially supplied as pulse-shaped current for detecting a signal to each MR element by a switching operation by switch in response to a prescribed clock signal, and output voltage from each MR element related to reproduction of a magnetic signal on a corresponding track is sequentially provided to one input side of a differential amplifier. In differential amplifier, the offset voltage of each MR element provided to the other input side and the above-described output voltage are differentially amplified and only voltage due to the reproducing magnetic signal of each track is accurately extracted. Accordingly, the supply of pulse-shaped current effectively suppresses increase in the amount of consumption current regardless of the number of tracks on the tape (or the number of heads), and since amplifier is shared between the tracks, the number of necessary terminals for such a multi-track MR head is reduced.

摘要翻译： 在多磁道磁信号重放装置中，相应于磁带上的轨道提供包括MR（磁阻效应）元件的多个MR磁头。 在再现时，来自恒流电源的恒定电流作为脉冲形电流被顺序提供，用于通过响应于规定的时钟信号的开关的切换操作检测每个MR元件的信号，并且从每个MR输出电压 将与相应轨道上的磁信号的再现相关的元件依次提供给差分放大器的一个输入侧。 在差分放大器中，提供给另一输入侧的每个MR元件的偏移电压和上述输出电压被差分放大，并且仅准确地提取由于每个磁道的再现磁信号引起的电压。 因此，脉冲电流的供给有效地抑制消耗电流量的增加，而与带上的磁道数（或磁头数）无关，并且由于放大器在磁道之间共享，所以需要的端子的数量 这样的多轨MR磁头减少了。

公开(公告)号：US5668746A

公开(公告)日：1997-09-16

申请号：US364187

申请日：1994-12-27

申请人： Tetsuo Iwaki ,  Toshiaki Harada ,  Chiaki Yamawaki

发明人： Tetsuo Iwaki ,  Toshiaki Harada ,  Chiaki Yamawaki

IPC分类号： G11B5/035 ,  G11B5/09 ,  G11B20/10 ,  H03H15/00 ,  H03H17/00 ,  H03H17/02 ,  H03H21/00 ,  H04B3/04 ,  G06F17/10 ,  G11B5/00

CPC分类号： G11B20/10037 ,  G11B20/10009 ,  G11B20/10046 ,  G11B5/035 ,  G11B5/09

摘要： Low-frequency components of a reproduced modulated signal is attenuated by an analog high-pass filter. The modulated signal with its low-frequency components attenuated is converted into a digital signal by means of an A/D converter. Then, the digital signal is directly introduced to a finite impulse response digital filter to be subjected to reproduced waveform equalization. Thereafter, the attenuation of the low-frequency components effected by the analog high-pass filter is compensated in an infinite impulse response digital filter.

摘要翻译： 再现调制信号的低频分量由模拟高通滤波器衰减。 其衰减的低频分量的调制信号通过A / D转换器转换为数字信号。 然后，将数字信号直接引入有限脉冲响应数字滤波器以进行再现波形均衡。 此后，由无限脉冲响应数字滤波器补偿由模拟高通滤波器影响的低频分量的衰减。

公开(公告)号：US5834761A

公开(公告)日：1998-11-10

申请号：US821858

申请日：1997-03-21

申请人： Hideo Okada ,  Masayuki Nishikawa ,  Tohru Okuda ,  Tetsuo Iwaki ,  Chiaki Yamawaki ,  Yoshinori Kinai

发明人： Hideo Okada ,  Masayuki Nishikawa ,  Tohru Okuda ,  Tetsuo Iwaki ,  Chiaki Yamawaki ,  Yoshinori Kinai

IPC分类号： H04N1/40 ,  H04N5/225 ,  H04N9/04 ,  H01J40/14

CPC分类号： G03B5/00 ,  H04N1/40068 ,  H04N5/2254 ,  H04N5/2259 ,  H04N9/045 ,  H04N2209/046

摘要： The Invention is an image input apparatus equipped with means of image shifting which is capable of inputting images of different resolutions, and enables the transmission band of the spatial filter to be switched in accordance with resolution in order to prevent moire. When a flat transparent refraction plate 22 is inclined relative to the optical axis 10 by which light from the object is introduced, the position where the image is formed on the imaging surface of the CCD 14 is shifted, thus making image shifting possible. High resolution images are obtained by shifting the image a distance shorter than the distance between the photosensitive parts of the CCD 14, and then combining the images. The transmission band of the spatial filter 12 for preventing moire can be switched by changing the relative angles of the double refraction plates 20, 21. The transmission band of the spatial filter 12 is switched to the high frequency side when inputting high resolution images by means of the image shift mechanism 13, thus obtaining images of good resolution.

摘要翻译： 本发明是一种图像输入装置，其具有能够输入不同分辨率的图像的图像移位装置，并且能够根据分辨率切换空间滤波器的发送频带，以防止莫尔条纹。 当平坦的透明折射板22相对于被引入物体的光的光轴10倾斜时，在CCD 14的成像表面上形成图像的位置被移位，从而使图像移位成为可能。 通过将图像移动距离短于CCD 14的感光部分之间的距离，然后组合图像来获得高分辨率图像。 可以通过改变双折射板20,21的相对角度来切换用于防止莫尔条纹的空间滤波器12的传输带。当通过装置输入高分辨率图像时，空间滤波器12的传输频带切换到高频侧 的图像偏移机构13，从而获得良好的分辨率的图像。

公开(公告)号：US5173815A

公开(公告)日：1992-12-22

申请号：US674207

申请日：1991-03-25

申请人： Tetsuo Iwaki ,  Hidetaka Mizumaki ,  Chiaki Yamawaki

发明人： Tetsuo Iwaki ,  Hidetaka Mizumaki ,  Chiaki Yamawaki

IPC分类号： G11B20/12 ,  G11B27/02 ,  G11B27/032 ,  G11B27/036

CPC分类号： G11B27/036 ,  G11B2220/216 ,  G11B2220/90 ,  G11B2220/913 ,  G11B27/032

摘要： A recording position compensation circuit for use in the digital information recording-reproduction apparatus of the present disclosure has a microprocessor for generating an offset signal indicating a deviation between standard signal processing time, which is required for a process wherein digital medium information already recorded on the recording medium is reproduced through the advanced reproduction head and re-recorded on the recording medium through the recording head, and inter-head travelling time required for the recording medium to travel a distance from the advanced reproduction head to the recording head. A first counter generates a reference symbol pointer indicating a reference of a sequence whereby digital information stored in the memory is read out so that a part of the digital information is rewritten. A second counter generates a compensated symbol pointer having a phase difference corresponding to the deviation with respect to the reference symbol pointer. Thus, since digital information is read out from the memory so that the signal processing time from reproduction to re-recording may coincide with the inter-head travelling time, a recording position on the recording medium at which rewriting is performed, is corrected.

公开(公告)号：US07295504B2

公开(公告)日：2007-11-13

申请号：US10374849

申请日：2003-02-25

申请人： Tazuko Kitazawa ,  Tetsuo Iwaki

发明人： Tazuko Kitazawa ,  Tetsuo Iwaki

IPC分类号： G11B7/00

CPC分类号： G11B7/1398 ,  G11B7/1353 ,  G11B7/13922

摘要： A beam shaping element includes a set of diffraction gratings on each surface thereof, in such a manner that intervals between the gratings farer from a vicinity of an optical axis and nearer to a periphery are narrower, wherein each interval between the respective gratings monotonously increases or monotonously decreases along a direction in which each grating-shaped pattern extends. According to the arrangement above, it is possible to correct displacement of a light emitting point of a light source by simply performing a positional adjustment within a plane that is orthogonal to the optical axis. Thus, it is possible to provide the beam shaping element that enables to correct the displacement of the light emitting point of the light source simply by performing positional adjustment in the plane vertical to the optical axis, thereby making it unnecessary to perform positional adjustment along the optical axis direction, and to provide a light source unit and an optical pickup using the beam shaping element.

摘要翻译： 光束成形元件包括在其每个表面上的一组衍射光栅，使得从光轴附近更靠近周边的光栅之间的间隔更窄，其中各个光栅之间的每个间隔单调增加或 沿着每个格子状图案延伸的方向单调减少。 根据上述结构，可以通过简单地在与光轴正交的平面内执行位置调整来校正光源的发光点的位移。 因此，可以简单地通过在垂直于光轴的平面中进行位置调整来提供能够校正光源的发光点的位移的光束整形元件，从而不需要沿着光轴的位置调整 光轴方向，并且提供使用光束成形元件的光源单元和光学拾取器。

公开(公告)号：US06577341B1

公开(公告)日：2003-06-10

申请号：US08950361

申请日：1997-10-14

申请人： Eiji Yamada ,  Toshiaki Harada ,  Tetsuo Iwaki ,  Tohru Okuda

发明人： Eiji Yamada ,  Toshiaki Harada ,  Tetsuo Iwaki ,  Tohru Okuda

IPC分类号： H04N314

CPC分类号： H04N9/045 ,  H04N5/349 ,  H04N2209/046

摘要： An imaging apparatus reduces the influence of the movement of hands and of the motion of an object on a high resolution picture image. Picture image light from the object passes through an optical system and light-transmitting domains of a color filter provided at the light incident side of an imaging device. The light-transmitting domains transmit only predetermined chromatic lights of the picture image light to input to corresponding photo-receiving domains of the imaging device. The imaging device is a two-picture element mixed reading type device. In a high resolution mode, an image forming point of the picture image light is moved to two places in parallel, and the picture image light is formed at each image forming point to image the picture image light. Then, the signal processing circuit combines the two original picture image signals whose image forming points during the imaging operation are different to generate a single output picture image signal. Thereby, an equivalent imaging time in imaging a single output picture image may be shortened.

摘要翻译： 成像装置减少了手的运动和物体的运动对高分辨率图像的影响。 来自物体的图像光通过设置在成像装置的光入射侧的滤色器的光学系统和透光区域。 透光域仅传输图像光的预定彩色光，以输入到成像装置的相应的光接收区域。 成像装置是双元素混合读取型装置。 在高分辨率模式中，图像光的图像形成点平行移动到两个位置，并且在每个图像形成点处形成图像光以对图像图像进行成像。 然后，信号处理电路组合成像操作期间的图像形成点不同的两个原始图像图像信号，以生成单个输出图像图像信号。 因此，可以缩短对单个输出图像进行成像的等效成像时间。

公开(公告)号：US06266086B1

公开(公告)日：2001-07-24

申请号：US08895244

申请日：1997-07-16

申请人： Hideo Okada ,  Tetsuo Iwaki ,  Tohru Okuda

发明人： Hideo Okada ,  Tetsuo Iwaki ,  Tohru Okuda

IPC分类号： H04N5225

CPC分类号： H04N5/23258 ,  H04N5/2259 ,  H04N5/23248 ,  H04N5/23287

摘要： An imaging apparatus includes a solid-state imaging element having a matrix of pixels thereon, an optical series for entering a subject image into the solid-state imaging element, and an image shifting mechanism for relatively shifting the subject image in 2-D with respect to the solid-state imaging element. A control circuit is further included for controlling an operation of the image shifting mechanism. Still further, an image synthesizing circuit is included for synthesizing a plurality of images shifted by the image shifting mechanism, along with a moving amount detecting unit for detecting a moving amount of the subject image on the solid-state imaging element. Finally, the imaging apparatus includes a shift amount generating unit for generating an image shift amount for the subject image first, and thence a correction image shift amount based on the image shift amount and moving amount, based on which the image shifting mechanism shifts the subject image. The above arrangement makes it possible to correct a movement of the subject image formed by the imaging apparatus, thereby realizing a high-resolution image.

摘要翻译： 一种成像装置包括其上具有像素矩阵的固态成像元件，用于将被摄体图像输入到固态成像元件的光学系列，以及用于相对地将二维中的被摄体图像相对移动的图像移动机构， 到固态成像元件。 还包括用于控制图像转换机构的操作的控制电路。 另外，包括用于合成由图像移动机构移位的多个图像的图像合成电路以及用于检测固态成像元件上的被摄体图像的移动量​​的移动量检测单元。 最后，成像装置包括：偏移量产生单元，用于首先产生用于被摄体图像的图像偏移量，然后根据图像偏移量和移动量基于图像移位机构移动被检体的校正图像偏移量 图片。 通过上述结构，能够校正由摄像装置形成的被摄体图像的移动，从而实现高分辨率的图像。

公开(公告)号：US06381208B1

公开(公告)日：2002-04-30

申请号：US09565950

申请日：2000-05-05

申请人： Kazutaka Abe ,  Tetsuo Iwaki

发明人： Kazutaka Abe ,  Tetsuo Iwaki

IPC分类号： G11B700

CPC分类号： G11B7/13925 ,  G11B7/00736 ,  G11B7/0945 ,  G11B7/1374 ,  G11B2007/0013 ,  G11B2007/13727

摘要： Thickness information and refractive index information of a light transmitting layer are recorded in advance on an optical recording medium. Based on the thickness information and the refractive index information of the light transmitting layer, space between two lens units of an objective lens system is adjusted in an optical recording and reproducing apparatus, so that spherical aberration is adjusted. Accordingly, in the optical recording and reproducing apparatus using two lens units, it becomes possible to correctly record or reproduce the information to and from the optical recording medium.

摘要翻译： 光传输层的厚度信息和折射率信息预先记录在光记录介质上。 基于厚度信息和透光层的折射率信息，在光学记录和再现装置中调整物镜系统的两个透镜单元之间的空间，从而调节球面像差。 因此，在使用两个透镜单元的光学记录和再现设备中，可以将信息正确地记录或再现到光学记录介质上。

公开(公告)号：US06342978B1

公开(公告)日：2002-01-29

申请号：US09510200

申请日：2000-02-22

申请人： Masayuki Nishikawa ,  Tetsuo Iwaki

发明人： Masayuki Nishikawa ,  Tetsuo Iwaki

IPC分类号： G02B702

CPC分类号： G11B7/0932

摘要： In accordance with the present invention a pickup device for optical disks includes spring wires supporting displaceably in focusing and tracking directions a lens holder holding an objective lens. One set of more than two spring wires is provided for each side of the lens holder and a total of two such sets of spring wires are arranged parallel to each other. Of more than two spring wires of each set, at least one spring wire has a cross section allowing a spring constant in the focusing direction and that in the tracking direction to vary from each other and is also positioned farther or closer than the remaining spring wires away or to a centerline of the objective lens. As such the pickup device can ensure a sufficient displacement in the focusing and tracking directions and also control an inclination of the lens holder.

摘要翻译： 根据本发明，用于光盘的拾取装置包括弹性丝，其支撑在聚焦和跟踪方向上可移动地保持保持物镜的透镜夹持器。 为透镜保持架的每一侧设置一组两根以上的弹簧丝，并且这两组弹簧丝彼此平行配置。 在每组的两根以上的弹簧线中，至少一根弹簧线具有允许聚焦方向上的弹簧常数并且在跟踪方向上彼此变化的横截面，并且还定位成比其余的弹簧线更远或更近 远离物镜或物镜的中心线。 因此，拾取装置可以确保在聚焦和跟踪方向上的足够的位移，并且还控制透镜保持器的倾斜度。