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公开(公告)号：US5049748A
公开(公告)日：1991-09-17
申请号：US599925
申请日：1990-10-19
申请人： Wataru Ito , Makoto Ohgoda , Yasuhiko Goto , Kazuo Horikawa
发明人： Wataru Ito , Makoto Ohgoda , Yasuhiko Goto , Kazuo Horikawa
摘要： Digital image signals are detected from radiation images of an object constituted of bones and soft tissues. A subtraction process is carried out with a predetermined parameter on the digital image signals, and a difference signal representing an image of part of the object is obtained. Each of images of a phantom, which has part exhibiting an equivalent radiation absorption coefficient to bones and/or part exhibiting an equivalent radiation absorption coefficient to soft tissues, is read out together with each object image. A value of the parameter is found, with which the image of either part of the phantom becomes erased in a subtraction image of the phantom obtained from subtraction processing. The value of the parameter, which has thus been found, is determined as an optimum value of the parameter. Subtraction processing is then carried out by using the optimum value of the parameter.
摘要翻译： 从由骨骼和软组织构成的物体的辐射图像中检测数字图像信号。 利用数字图像信号上的预定参数执行减法处理，并且获得表示对象的一部分的图像的差分信号。 与每个对象图像一起读出具有对骨骼和/或表现出对软组织的等效放射线吸收系数的部分具有等效辐射吸收系数的部分的体模的每个图像。 发现该参数的值，通过减法处理获得的幻影的减法图像中的幻像的任一部分的图像将被清除。 已经找到的参数的值被确定为参数的最佳值。 然后通过使用参数的最佳值来执行减法处理。
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公开(公告)号：US4885467A
公开(公告)日：1989-12-05
申请号：US205243
申请日：1988-06-10
申请人： Kazuo Horikawa
发明人： Kazuo Horikawa
IPC分类号： A61B6/00 , G01N21/59 , G03B42/02 , G03F1/00 , G06T1/00 , H04N1/04 , H04N1/113 , H04N1/19 , H04N1/401
CPC分类号： G01N21/5911 , H04N1/401
摘要： Shading is eliminated in an image read-out apparatus for scanning a light beam on a recording medium carrying an image recorded thereon, obtaining light which carries the image by the scanning, and detecting the light by use of a photomultiplier to obtain read-out signals carrying the image. A shading elimination method comprises the steps of detecting the shading characteristics in the direction of main scanning of the light beam by changing the level of high voltage applied to the photomultiplier to a plurality of levels prior to the detection of the light, and storing the shading characteristics to correspond to the levels of the high voltage in a memory. The level of the high voltage is detected at the time of the detection of the light, and the shading characteristics that correspond to the detected level of the high voltage are read from the memory. The read-out signals are corrected in accordance with the shading characteristics read from the memory so that changes in the output of the photomultiplier caused by the shading are eliminated.
摘要翻译： 在用于扫描携带记录在其上的图像的记录介质上的光束的图像读出装置中消除阴影，获得通过扫描携带图像的光，并且通过使用光电倍增管检测光以获得读出信号 携带图像。 遮光消除方法包括以下步骤：通过在光检测之前将施加到光电倍增器的高电压的电平改变到多个级别来检测光束的主扫描方向上的阴影特性，并且存储阴影 特性对应于存储器中的高电压电平。 在检测到光时检测高电压电平，并从存储器中读取与检测到的高电压电平对应的阴影特性。 读取信号根据从存储器读取的阴影特性进行校正，从而消除了由阴影引起的光电倍增管输出的变化。
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公开(公告)号：US4841135A
公开(公告)日：1989-06-20
申请号：US235131
申请日：1988-08-23
申请人： Chiaki Goto , Kazuo Horikawa
发明人： Chiaki Goto , Kazuo Horikawa
CPC分类号： G02B27/0031 , G02B26/127 , H04N1/0473 , H04N1/1135 , H04N2201/0471 , H04N2201/04762
摘要： A method of correcting unevenness in scanning lines in a light beam scanning apparatus having a mechanical scanning light beam deflector which rotates about a rotational axis to deflect a scanning light beam in a main scanning direction and a correcting light beam deflector for deflecting the scanning light beam in a sub-scanning direction, comprising steps of continuously detecting deflection of the rotational axis of the scanning light beam deflector to obtain nonperiodic deviation of the scanning light beam in the sub-scanning direction, storing the difference between a position of the scanning light beam detected at a starting point immediately before the effective scanning range and the nonperiodic deviation of the scanning light beam as a starting point deviation, storing the difference between a position of the scanning light beam detected at an end point immediately behind the effective scanning range and the nonperiodic deviation of the scanning light beam as an end point deviation, successively calculating deviation of the scanning light beam from a target scanning position in the middle of straight scanning on the basis of the stored starting point deviation, the stored end point deviation and the rotating angle of the scanning light beam deflector as periodic deviation, and determining the amount by which the scanning light beam is to be deflected in the sub-scanning direction by the correcting light beam deflector on the basis of the sum of the nonperiodic deviation and the periodic deviation.
摘要翻译： 一种校正具有机械扫描光束偏转器的光束扫描装置中的不平坦度的方法，所述机械扫描光束偏转器围绕旋转轴线旋转以使主扫描方向上的扫描光束偏转，以及校正光束偏转器，用于偏转扫描光束 在副扫描方向上，包括以下步骤：连续地检测扫描光束偏转器的旋转轴的偏转，以获得扫描光束在副扫描方向上的非周期性偏差，存储扫描光束的位置之间的差异 在紧接有效扫描范围之前的起始点和扫描光束的非周期性偏差作为起始点偏差处检测到，存储在紧接在有效扫描范围之后的终点处检测到的扫描光束的位置与 作为终点偏移的扫描光束的非周期性偏差 根据存储的起始点偏差，存储的终点偏差和扫描光束偏转器的旋转角度作为周期性偏差，依次计算扫描光束在直扫描中间的目标扫描位置的偏差， 并且基于非周期偏差和周期性偏差之和来确定扫描光束在副扫描方向上被校正光束偏转器偏转的量。
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公开(公告)号：US4757199A
公开(公告)日：1988-07-12
申请号：US9002
申请日：1987-01-28
申请人： Kazuo Horikawa
发明人： Kazuo Horikawa
CPC分类号： H04N1/40056
摘要： A sheet carrying an image stored therein is scanned by a light beam emitted by a light source. Light which is obtained by the scanning of the sheet and which carries the image is detected by use of a photomultiplier. When the level of output current of the photomultiplier becomes higher than a predetermined standard level, the intensity of the light beam is decreased so that the level of the output current of the photomultiplier does not exceed the predetermined standard level, thereby preventing the photomultiplier from being broken by light of high intensity.
摘要翻译： 携带其中存储的图像的片材被由光源发射的光束扫描。 通过使用光电倍增管检测通过片材的扫描获得并携带图像的光。 当光电倍增管的输出电流的电平变得高于预定的标准电平时，光束的强度降低，使得光电倍增器的输出电流的电平不超过预定的标准电平，从而防止光电倍增管 被高强度的光破坏。
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45.发明授权Light beam scanning recording apparatus width modulation of both total pulse duration and intensity 失效光束扫描记录装置宽度调制的总脉冲持续时间和强度
公开(公告)号：US4754291A
公开(公告)日：1988-06-28
申请号：US17945
申请日：1987-02-24
申请人： Kazuo Horikawa
发明人： Kazuo Horikawa
CPC分类号： H04N1/40043 , H04N1/40037 , H04N1/4056
摘要： A light beam scanning recording apparatus for recording information on a recording material by modulating a laser beam emitted by a semiconductor laser and scanning the recording material with the modulated laser beam is constituted to modulate the laser beam by combining pulse number modulation or pulse width modulation with intensity modulation. Intensity modulation of the laser beam is conducted by controlling the drive current of the semiconductor laser. A plurality of semiconductor lasers may be provided for scanning with a coalesced laser beam obtained by coalescing laser beams emitted by the semiconductor lasers, and intensity modulation may be conducted by changing the number of the laser beams which are coalesced.
摘要翻译： 一种光束扫描记录装置，用于通过调制由半导体激光器发射的激光束并用调制的激光束扫描记录材料来记录信息在记录材料上，通过将脉冲数调制或脉冲宽度调制与 强度调制。 通过控制半导体激光器的驱动电流来进行激光束的强度调制。 可以提供多个半导体激光器用于通过聚集由半导体激光器发射的激光束获得的聚结的激光束进行扫描，并且可以通过改变聚结的激光束的数量来进行强度调制。
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46.发明授权Brushless motor with a rotor pole position detector associated with each armature winding and electrically connected to another armature winding 失效具有与每个电枢绕组相关并且电连接到另一个电枢绕组的转子磁极位置检测器的无刷电动机
公开(公告)号：US4723100A
公开(公告)日：1988-02-02
申请号：US744440
申请日：1985-06-13
申请人： Kazuo Horikawa , Yoshiaki Ishino , Takenori Tomita
发明人： Kazuo Horikawa , Yoshiaki Ishino , Takenori Tomita
CPC分类号： H02K29/08 , Y10S250/909
摘要： A brushless motor includes a plurality of stator armature windings having winding frames with spaces defined therein, respectively, a rotor mounted on a rotatable shaft and having field poles rotatable with respect to the armature windings, and a plurality of rotor position detectors such as Hall-effect devices disposed in the spaces, respectively, and having output terminals connected respectively to the input terminals of other armature windings, for continuously varying the currents flowing through the other armature windings dependent on signals indicative of the magnetic fluxes from the field poles as detected by the rotor position detectors.
摘要翻译： 一种无刷电动机，包括多个定子电枢绕组，分别具有限定在其中的空间的绕组框架，安装在可旋转轴上并具有相对于电枢绕组可转动的励磁磁极的转子，以及多个转子位置检测器， 分别设置在空间中并且具有分别连接到其他电枢绕组的输入端子的输出端子，用于连续地改变流过另一个电枢绕组的电流，这取决于指示来自磁场的磁通量的信号，如通过 转子位置检测器。
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公开(公告)号：US4700066A
公开(公告)日：1987-10-13
申请号：US686886
申请日：1984-12-27
申请人： Kazuo Horikawa
发明人： Kazuo Horikawa
CPC分类号： H04N1/053 , H04N1/1135 , H04N1/12 , H04N2201/0471 , H04N2201/04755
摘要： In a light beam scanning apparatus, two photodetectors are positioned in spaced relation by a predetermined distance within a scanning region in a main scanning direction. The start and the end of scanning in the main scanning direction are detected by the photodetectors. The scanning speed of a main scanning means is controlled so that a predetermined number of pulses of a pulse signal having a predetermined period are input within the time between the start and the end of scanning in the main scanning direction. Or, a single photodetector is positioned within the scanning region, and the scanning time from the start of scanning to the photodetector is detected by use of the photodetector. The initial position of scanning is controlled so that a predetermined number of pulses of the pulse signal having a predetermined period are input within the scanning time.
摘要翻译： 在光束扫描装置中，两个光电检测器在主扫描方向上的扫描区域内以预定距离间隔开定位。 在主扫描方向的扫描的开始和结束由光检测器检测。 控制主扫描装置的扫描速度，使得在主扫描方向的扫描开始和结束之间的时间内输入预定数量的具有预定周期的脉冲信号的脉冲。 或者，单个光电检测器位于扫描区域内，并且通过使用光电检测器检测从扫描开始到光电检测器的扫描时间。 控制扫描的初始位置，使得在扫描时间内输入具有预定周期的脉冲信号的预定数量的脉冲。
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公开(公告)号：US4659180A
公开(公告)日：1987-04-21
申请号：US569560
申请日：1984-01-10
申请人： Toru Itakura , Yuji Ohara , Kazuo Horikawa
发明人： Toru Itakura , Yuji Ohara , Kazuo Horikawa
摘要： A metal mount of a galvanometer is secured to a plate made of an electrically conductive material via a thin insulating layer in electrically insulated relation to the plate. The thin insulating layer has a thickness within the range of about 10 .mu.m to about 500 .mu.m. The metal mount and the thin insulating layer are cylindrical and are secured to a cylindrical through hole formed in the plate. Or, the metal mount has an L-shaped cross-section. One section of the L-shaped metal mount is secured to the plate by use of bolts, and the other section thereof is secured to the galvanometer by use of screws. In this case, an insulation sheet is positioned between the one section of the L-shaped metal mount and the plate.
摘要翻译： 电流计的金属安装件通过与该板电绝缘的薄绝缘层固定到由导电材料制成的板上。 薄绝缘层的厚度在约10μm至约500μm的范围内。 金属安装件和薄绝缘层是圆柱形的并且固定到形成在板中的圆柱形通孔。 或者，金属支架具有L形横截面。 通过使用螺栓将L形金属安装件的一部分固定到板上，并且其另一部分通过使用螺钉固定到电流计。 在这种情况下，绝缘片位于L形金属安装座的一个部分和板之间。
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公开(公告)号：US4590369A
公开(公告)日：1986-05-20
申请号：US541634
申请日：1983-10-13
申请人： Kazuo Horikawa
发明人： Kazuo Horikawa
CPC分类号： G01T1/208 , G01T1/2014 , G01T1/2016
摘要： In a system provided with a plurality of photomultipliers, the sensitivities of the photomultipliers relative to one another are detected by comparing the outputs of the photomultipliers generated under irradiation by light emitted from the same light source. The difference between the detected sensitivities relative to one another and predetermined sensitivities relative to one another is calculated, and the sensitivities of the respective photomultipliers are corrected so that the difference becomes zero.
摘要翻译： 在具有多个光电倍增管的系统中，通过比较由相同光源发射的光照射下产生的光电倍增管的输出来检测光电倍增管相对于彼此的灵敏度。 计算检测到的相对于彼此的灵敏度和相对于彼此的预定灵敏度之间的差异，并且校正各个光电倍增管的灵敏度，使得差为零。
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公开(公告)号：US4584482A
公开(公告)日：1986-04-22
申请号：US440046
申请日：1982-11-08
申请人： Toshiaki Suzuki , Kazuo Horikawa
发明人： Toshiaki Suzuki , Kazuo Horikawa
CPC分类号： G03B42/02 , G01T1/2016 , G03C5/16 , G21K4/00
摘要： In a radiation image recording and read-out system in which a stimulable phosphor sheet is repeatedly used for recording radiation images, and noise developing due to residual radiation energy on the phosphor sheet is eliminated by exposing the phosphor sheet to erasing light prior to radiation image recording step, the level of residual radiation energy is detected, and the amount of exposure of the phosphor sheet to erasing light is controlled according to the detected level of residual radiation energy. The exposure amount is controlled to erase residual radiation energy to a level within the range between 0.01 and 0.0001 with the maximum of the originally stored radiation energy taken as 100.
摘要翻译： 在其中可重复使用可刺激的磷光体片用于记录辐射图像的放射线图像记录和读出系统中，通过在荧光片之前将荧光片暴露于擦除光而消除由于荧光体片上的残留辐射能引起的噪声发展 记录步骤，检测剩余辐射能量的水平，并且根据检测到的剩余辐射能量的水平来控制荧光粉片对擦除光的曝光量。 控制曝光量以将残余辐射能量消除到0.01至0.0001之间的范围内，最初存储的辐射能量的最大值为100。
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