公开(公告)号：US4989196A

公开(公告)日：1991-01-29

申请号：US277194

申请日：1988-11-29

申请人： Akihiro Ishikawa ,  Haruo Isaka

发明人： Akihiro Ishikawa ,  Haruo Isaka

IPC分类号： G11B7/005 ,  G11B7/125 ,  G11B20/10 ,  G11B27/36

CPC分类号： G11B7/126 ,  G11B20/10212 ,  G11B27/36 ,  G11B7/005

摘要： An optical information recording apparatus optically records digital information on a recording medium, for example, a disc, a tape and so on. The area of an optical spot cannot be made smaller than a minimum area determined by a numerical aperture of an objective lens and the wave length of a reproducing beam. Consequently, this causes a problem that the code of digital signals often fails to be discriminated in reproducing short pits and/or short pit-intervals which are recorded on the recording medium. The apparatus detects a phase difference between each edge of an input digital signal and each corresponding edge of a digital signal reproduced from the recording medium. The edges of a next input digital signal of the same code construction as that of the first input signal are corrected by a correction amount according to the above phase difference, and such operations are repeated whenever input digital signals are inputted. Consequently the apparatus can decrease errors of code discrimination to minimum and achieve high edge correction. Furthermore, since the input digital signal is delayed by a time interval between the recording by the recording head and the reproducing by the reproducing head, edge correction can be achieved with high precision.

公开(公告)号：US06804072B1

公开(公告)日：2004-10-12

申请号：US09856782

申请日：2001-05-25

申请人： Hiroshi Yohda ,  Masaru Higashionji ,  Haruo Isaka ,  Hideaki Mukae ,  Kouhei Baba ,  Kazunori Umee

发明人： Hiroshi Yohda ,  Masaru Higashionji ,  Haruo Isaka ,  Hideaki Mukae ,  Kouhei Baba ,  Kazunori Umee

IPC分类号： G11B2736

CPC分类号： G11B27/36 ,  G11B5/0086 ,  G11B5/455 ,  G11B5/53 ,  G11B15/087 ,  G11B15/125 ,  G11B15/1808 ,  G11B27/34 ,  G11B2220/90

摘要： A clogging detector used for a VTR to check the recording state of a recording head without using the reproducing head. A test signal of a lower frequency than the erasing frequency is recorded before and after an information signal by means of an erasing head. Before and after recording the information signal by means of the recording head, the test signal is reproduced, the reproduction output is detected by a detecting circuit, and the level of the output is compared with a preset level by a comparing circuit. When the level is lower than the preset level, a warming is issued from a warming circuit, thus preventing a recording failure due to the clogging of the head.

摘要翻译： 用于VTR的堵塞检测器来检查记录头的记录状态，而不使用再现头。 通过擦除头在信息信号之前和之后记录比擦除频率低的测试信号。 在通过记录头记录信息信号之前和之后，再现测试信号，由检测电路检测再现输出，并通过比较电路将输出电平与预设电平进行比较。 当电平低于预设电平时，从加热电路发出升温，从而防止由于头部堵塞而引起的记录故障。

公开(公告)号：US4785441A

公开(公告)日：1988-11-15

申请号：US4139

申请日：1987-01-16

申请人： Shinichi Tanaka ,  Haruo Isaka ,  Hiroshi Yasuda ,  Toshiki Itoi

发明人： Shinichi Tanaka ,  Haruo Isaka ,  Hiroshi Yasuda ,  Toshiki Itoi

IPC分类号： G11B7/095 ,  G11B7/09 ,  G11B7/00

CPC分类号： G11B7/094 ,  G11B7/0901 ,  G11B7/0909

摘要： Disclosed herein is an optical information reproducing apparatus having a phase difference tracking system which is free from an influence of a tangential phase difference of output signals from a photodetector. The photodetector comprises first through fourth photocells which are respectively disposed at first through fourth quadrants defined by a first straight line parallel to an information track image and a second straight line perpendicular to the first straight line. Output signals of the first and second photocells are delayed for a specified time by respective first and second delaying circuits. Output signals of the first delaying circuit and the third photocell are added by a first adder, and output signals of the second delaying circuit and the fourth photocell are added by a second adder. A phase comparator produces a tracking error signal from a phase difference between output signals of the first and second adders. Alternatively, a first phase comparator produces a phase difference between the output signals of the first and second photocells, and/or a second comparator produces a phase difference between the output signals of the third and fourth photocells. At least one of output signals of the first and second comparator is used for producing a tracking error signal.

摘要翻译： 本文公开了一种具有相位差跟踪系统的光信息再现装置，其不受来自光电检测器的输出信号的切向相位差的影响。 光电检测器包括第一至第四光电池，它们分别设置在第一至第四象限之间，第四象限由平行于信息轨道图像的第一直线和垂直于第一直线的第二直线限定。 第一和第二光电管的输出信号由相应的第一和第二延迟电路延迟指定的时间。 第一延迟电路和第三光电池的输出信号由第一加法器相加，第二延迟电路和第四光电管的输出信号由第二加法器相加。 相位比较器从第一和第二加法器的输出信号之间的相位差产生跟踪误差信号。 或者，第一相位比较器产生第一和第二光电池的输出信号之间的相位差，和/或第二比较器产生第三和第四光电池的输出信号之间的相位差。 使用第一和第二比较器的至少一个输出信号来产生跟踪误差信号。

公开(公告)号：US08654228B2

公开(公告)日：2014-02-18

申请号：US13048332

申请日：2011-03-15

申请人： Haruo Isaka ,  Mikio Sakurai ,  Yasuhiro Nakagai

发明人： Haruo Isaka ,  Mikio Sakurai ,  Yasuhiro Nakagai

IPC分类号： H04N3/14 ,  H04N5/335

CPC分类号： G03B17/14 ,  G03B9/36 ,  H04N5/23209 ,  H04N5/3532 ,  H04N5/3572

摘要： An imaging apparatus includes an optical system configured to collect subject light, an imaging device having an electronic front curtain function, configured to receive the subject light to generate an image signal, a data storage unit configured to store an exit pupil distance of the optical system and a correction amount of the exit pupil distance, a mechanical shutter capable of cutting off the subject light passing through the optical system to the imaging device, and a correction unit configured to obtain the exit pupil distance of the optical system and the correction amount of the exit pupil distance from the data storage unit, obtain a corrected exit pupil distance using the obtained exit pupil distance of the optical system and a correction amount of the exit pupil distance, and correct brightness unevenness of the image signal based on the corrected exit pupil distance.

摘要翻译： 一种成像装置，包括：被配置为收集被摄体光的光学系统，具有电子前帘功能的成像装置，被配置为接收被摄体光以产生图像信号;数据存储单元，被配置为存储所述光学系统的出射光瞳距离 以及出射光瞳距离的校正量，能够将通过光学系统的被摄体的光线切断到成像装置的机械快门，以及校正单元，被配置为获得光学系统的出射光瞳距离和校正量 距离数据存储单元的出射光瞳距离，使用所获得的光学系统的出射光瞳距离和出射光瞳距离的校正量来获得校正的出射光瞳距离，以及基于校正出射光瞳的图像信号的校正亮度不均匀 距离。

公开(公告)号：US5953482A

公开(公告)日：1999-09-14

申请号：US937303

申请日：1997-09-22

申请人： Kouhei Suzuki ,  Haruo Ohta ,  Hideaki Mukae ,  Jun Takeuchi ,  Haruo Isaka

发明人： Kouhei Suzuki ,  Haruo Ohta ,  Hideaki Mukae ,  Jun Takeuchi ,  Haruo Isaka

IPC分类号： G11B5/008 ,  G11B5/53 ,  G11B15/12 ,  G11B15/18 ,  G11B27/032 ,  G11B27/036 ,  H04N5/7826 ,  H04N5/93

CPC分类号： H04N5/78263 ,  G11B15/125 ,  G11B15/1875 ,  G11B27/036 ,  G11B5/0086 ,  G11B5/531 ,  G11B2220/90 ,  G11B27/032

摘要： A magnetic recording/reproducing apparatus is provided in which among diametrically oppositely disposed heads, a recording head and an erasing head of a same channel are disposed adjacently to each other. The recording head is disposed so as to precede by two tracks the erasing head with respect to a direction of cylinder rotation, when insert-editing, using a reproduced signal obtained by the recording head, erase and record timing setting and head tracking are performed and an erasing current is not applied during the reproduction by the recording head. The reproducing heads are disposed so as to be angularly apart by about 90 degrees from the recording and erasing heads, and a rotary transformer for reproduction is applied with a shield measure and then, formed as a core independently at an upper portion of the cylinder. In addition, more narrow tracks are compatibly reproduced by the recording head.

公开(公告)号：US08422876B2

公开(公告)日：2013-04-16

申请号：US13587110

申请日：2012-08-16

申请人： Haruo Isaka ,  Mitsuyoshi Okamoto ,  Kenji Kawazoe ,  Naotake Kitahira ,  Koji Shibuno

发明人： Haruo Isaka ,  Mitsuyoshi Okamoto ,  Kenji Kawazoe ,  Naotake Kitahira ,  Koji Shibuno

IPC分类号： G03B13/36

CPC分类号： G03B17/14 ,  G02B7/08 ,  H04N5/23209 ,  H04N5/23212 ,  H04N5/23258 ,  H04N5/2628

摘要： An interchangeable lens includes a focus lens for changing a focus state of an object image, a driving unit for driving the focus lens, a lens controller for controlling the driving unit so as to move the focus lens forward and backward along the optical axis at a predetermined drive frequency, and a storage unit for storing therein drive frequency information representing a drive frequency at which the driving unit can control. A camera body obtains the drive frequency information from the interchangeable lens and performs control while referring to the drive frequency information.

摘要翻译： 可互换透镜包括用于改变对象图像的聚焦状态的聚焦透镜，用于驱动聚焦透镜的驱动单元，用于控制驱动单元的透镜控制器，以便使聚焦透镜沿着光轴向前和向后移动 以及用于存储表示驱动单元可以控制的驱动频率的驱动频率信息的存储单元。 相机机体从可更换镜头获取驱动频率信息，并参照驱动频率信息进行控制。

公开(公告)号：USRE39029E1

公开(公告)日：2006-03-21

申请号：US10349954

申请日：2003-01-24

申请人： Kouhei Baba ,  Haruo Ohta ,  Hideaki Mukae ,  Jun Takeuchi ,  Haruo Isaka

发明人： Kouhei Baba ,  Haruo Ohta ,  Hideaki Mukae ,  Jun Takeuchi ,  Haruo Isaka

IPC分类号： H04N5/93

CPC分类号： G11B5/53 ,  G11B5/0086 ,  G11B5/534 ,  G11B15/125 ,  G11B15/4675

摘要： A magnetic recording/reproducing apparatus is provided in which among diametrically oppositely disposed heads, a recording head and an erasing head of a same channel are disposed adjacently to each other. The recording head is disposed so as to precede by two tracks the erasing head with respect to a direction of cylinder rotation, when insert-editing, using a reproduced signal obtained by the recording head, erase and record timing setting and head tracking are performed and an erasing current is not applied during the reproduction by the recording head. The reproducing heads are disposed so as to be angularly apart by about 90 degrees from the recording and erasing heads, and a rotary transformer for reproduction is applied with a shield measure and then, formed as a core independently at an upper portion of the cylinder. In addition, more narrow tracks are compatibly reproduced by the recording head.

摘要翻译： 提供了一种磁记录/再现装置，其中在径向相对设置的头之间，相邻通道的记录头和擦除头彼此相邻设置。 记录头相对于气缸旋转方向设置在两个轨道之前，即擦除头，当使用由记录头获得的再现信号进行插入编辑时，执行擦除和记录定时设置和磁头跟踪， 在记录头的再现期间不施加擦除电流。 再现头被设置成与记录和擦除头成角度地分开约90度，并且用于再现的旋转变压器被施加屏蔽测量，然后在缸的上部独立地形成为芯。 此外，由记录头兼容地再现更窄的轨道。

公开(公告)号：US4740940A

公开(公告)日：1988-04-26

申请号：US837287

申请日：1986-03-06

申请人： Shinichi Tanaka ,  Haruo Isaka ,  Yuji Tanaka

发明人： Shinichi Tanaka ,  Haruo Isaka ,  Yuji Tanaka

IPC分类号： G11B7/09 ,  G11B7/095

CPC分类号： G11B7/0948 ,  G11B7/0901

摘要： An optical information read apparatus for optically reading information recorded on a recording medium includes an optical head for producing two detected signals whose phases vary according to a tracking error of the head, and a tracking error detecting circuit for producing a tracking error signal corresponding to a phase difference between the two detected signals, and a tracking controller for controlling the optical head in response to the tracking error signal. The tracking error detecting circuit has a correlation test circuit for checking a correlation between the states of the two detected signals, and for making the tracking error signal substantially invalid when there is no correlation between the states of the two detected signals. Thus, a stable tracking control can be performed.

摘要翻译： 用于光学读取记录在记录介质上的信息的光学信息读取装置包括：光头，用于产生根据磁头的跟踪误差而相位变化的两个检测信号;以及跟踪误差检测电路，用于产生对应于 两个检测信号之间的相位差，以及响应于跟踪误差信号控制光头的跟踪控制器。 跟踪误差检测电路具有用于检查两个检测信号的状态之间的相关性的相关测试电路，并且当两个检测信号的状态之间没有相关性时，使跟踪误差信号基本无效。 因此，可以执行稳定的跟踪控制。

公开(公告)号：US08275251B2

公开(公告)日：2012-09-25

申请号：US12935357

申请日：2009-04-15

申请人： Haruo Isaka ,  Mitsuyoshi Okamoto ,  Kenji Kawazoe ,  Naotake Kitahira ,  Koji Shibuno

发明人： Haruo Isaka ,  Mitsuyoshi Okamoto ,  Kenji Kawazoe ,  Naotake Kitahira ,  Koji Shibuno

IPC分类号： G03B13/34

CPC分类号： G03B17/14 ,  G02B7/08 ,  H04N5/23209 ,  H04N5/23212 ,  H04N5/23258 ,  H04N5/2628

摘要： An interchangeable lens includes a focus lens for changing a focus state of an object image, a driving unit for driving the focus lens, a lens controller for controlling the driving unit so as to move the focus lens forward and backward along the optical axis at a predetermined drive frequency, and a storage unit for storing therein drive frequency information representing a drive frequency at which the driving unit can control. A camera body obtains the drive frequency information from the interchangeable lens and performs control while referring to the drive frequency information.

摘要翻译： 可互换透镜包括用于改变对象图像的聚焦状态的聚焦透镜，用于驱动聚焦透镜的驱动单元，用于控制驱动单元的透镜控制器，以便使聚焦透镜沿着光轴向前和向后移动 以及用于存储表示驱动单元可以控制的驱动频率的驱动频率信息的存储单元。 相机机体从可更换镜头获取驱动频率信息，并参照驱动频率信息进行控制。

公开(公告)号：US20110091194A1

公开(公告)日：2011-04-21

申请号：US12935357

申请日：2009-04-15

申请人： Haruo Isaka ,  Mitsuyoshi Okamoto ,  Kenji Kawazoe ,  Naotake Kitahira ,  Koji Shibuno

发明人： Haruo Isaka ,  Mitsuyoshi Okamoto ,  Kenji Kawazoe ,  Naotake Kitahira ,  Koji Shibuno

IPC分类号： G03B13/34 ,  H04N5/232 ,  G02B7/04

CPC分类号： G03B17/14 ,  G02B7/08 ,  H04N5/23209 ,  H04N5/23212 ,  H04N5/23258 ,  H04N5/2628

摘要： An interchangeable lens (200) has a focus lens (230) for changing focus conditions of an object image, a drive means (233) for driving the focus lens (230), a lens control means (240) for controlling the drive means (233) so as to advance and retract the focus lens (230) along the optical axis at a predetermined drive frequency, and a memory means (242) for storing therein drive frequency information representing a drive frequency which can be controlled by the drive means. A camera body (100) obtains the drive frequency information from the interchangeable lens (200) and performs control while referring to the drive frequency information.

摘要翻译： 可互换透镜（200）具有用于改变被摄体图像的聚焦条件的聚焦透镜（230），用于驱动聚焦透镜的驱动装置（233），用于控制驱动装置的透镜控制装置（240） 233），以便以预定的驱动频率沿着光轴推进和缩回对焦透镜（230），以及用于存储表示可由驱动装置控制的驱动频率的驱动频率信息的存储装置（242）。 照相机主体（100）从可更换镜头（200）获取驱动频率信息，并参照驱动频率信息进行控制。