公开(公告)号：US5598061A

公开(公告)日：1997-01-28

申请号：US399989

申请日：1995-03-07

申请人： Kimitsugu Nakamura ,  Yoshio Fujita ,  Keiichi Ohishi

发明人： Kimitsugu Nakamura ,  Yoshio Fujita ,  Keiichi Ohishi

IPC分类号： H01J43/26 ,  H01J43/06 ,  H01J43/04 ,  H01J43/00 ,  H01J43/20

CPC分类号： H01J43/06

摘要： A photomultiplier includes a photoelectric surface for photoelectrically converting incident light and emitting electrons, and a plurality of stages of dynodes for multiplying the electrons. The photomultiplier includes a first dynode array including box-and-grid dynodes arranged in a vessel and a second dynode array including in-line dynodes arranged in the vessel. A dynode having a curved secondary electron emitting layer opposes both a secondary electron emitting layer of a last stage dynode of the first dynode array and a secondary electron emitting layer of a first-stage dynode of the second dynode array.

摘要翻译： 光电倍增管包括用于光电转换入射光并发射电子的光电表面，以及用于乘以电子的多级倍增电极。 光电倍增管包括第一倍增极阵列，其包括布置在容器中的盒式和栅格倍增电极和包括布置在容器中的直列倍增电极的第二倍增电极阵列。 具有弯曲的二次电子发射层的倍增极与第一倍增电极阵列的最后一级倍增电极的二次电子发射层和第二倍增电极阵列的第一级倍增电极的二次电子发射层相反。

公开(公告)号：US20060164008A1

公开(公告)日：2006-07-27

申请号：US11182080

申请日：2005-07-15

申请人： Kimitsugu Nakamura ,  Yousuke Oohashi ,  Keiichi Ohishi ,  Masuo Ito

发明人： Kimitsugu Nakamura ,  Yousuke Oohashi ,  Keiichi Ohishi ,  Masuo Ito

IPC分类号： H01J43/18

CPC分类号： H01J43/22 ,  H01J43/18 ,  H01J43/26

摘要： This invention relates to an electron multiplier unit and others enabling cascade multiplication of electrons through successive emission of secondary electrons in multiple stages in response to incidence of primary electrons. The electron multiplier unit has a first support member provided with an inlet aperture for letting primary electrons in, and a second support member located so as to face the first support member. The first support member is provided with a focusing electrode functioning to alter trajectories of the primary electrons, in order to guide the primary electrons to the inlet aperture. These first and second support members hold an electron multiplication section for the cascade multiplication and an anode. The electron multiplication section comprises at least a first dynode of a box type and a second dynode having a reflection type secondary electron emission surface located so as to face the first dynode and arranged to receive secondary electrons from the first dynode and to emit secondary electrons to a side where the first dynode is located. The anode is located at a position where the secondary electrons emitted from the first dynode do not directly arrive, and the second dynode alters a travel path of secondary electrons so as to be kept in a space between the first and second support members.

摘要翻译： 本发明涉及电子倍增器单元和其它能够响应于初级电子的入射而以多级连续发射二次电子的电子级联乘法。 电子倍增器单元具有第一支撑构件，该第一支撑构件设置有用于使一次电子入口的入口孔和位于第一支撑构件的第二支撑构件。 第一支撑构件设置有用于改变初级电子的轨迹的聚焦电极，以便将一次电子引导到入口孔。 这些第一和第二支撑构件保持用于级联乘法和阳极的电子倍增部分。 电子倍增部分至少包括箱型的第一倍增极和具有反射型二次电子发射表面的第二倍增电极，所述反射型二次电子发射表面定位成面对第一倍增电极并被布置成从第一倍增电极接收二次电子并发射二次电子 第一个倍极管所在的一侧。 阳极位于从第一倍增电极发射的二次电子不直接到达的位置，并且第二倍增极改变二次电子的行进路径，以便保持在第一和第二支撑构件之间的空间中。

公开(公告)号：US20060164007A1

公开(公告)日：2006-07-27

申请号：US11080665

申请日：2005-03-16

申请人： Kimitsugu Nakamura ,  Yousuke Oohashi ,  Keiichi Ohishi ,  Masuo Ito

发明人： Kimitsugu Nakamura ,  Yousuke Oohashi ,  Keiichi Ohishi ,  Masuo Ito

IPC分类号： H01J43/18

CPC分类号： H01J43/22 ,  H01J43/18 ,  H01J43/26

摘要： This invention relates to an electron multiplier unit and others enabling cascade multiplication of electrons through successive emission of secondary electrons in multiple stages in response to incidence of primary electrons. The electron multiplier unit has a first support member provided with an inlet aperture for letting primary electrons in, and a second support member located so as to face the first support member. These first and second support members hold an electron multiplication section for the cascade multiplication and an anode. The electron multiplication section is comprised of at least a first dynode of a box type and a second dynode having a reflection type secondary electron emission surface located so as to face the first dynode and arranged to receive secondary electrons from the first dynode and to emit secondary electrons to a side where the first dynode is located. The anode is located at a position where the secondary electrons emitted from the first dynode do not directly arrive, and the second dynode alters a travel path of secondary electrons so as to be kept in a space between the first and second support members.

摘要翻译： 本发明涉及电子倍增器单元和其它能够响应于初级电子的入射而以多级连续发射二次电子的电子级联乘法。 电子倍增器单元具有第一支撑构件，该第一支撑构件设置有用于使一次电子入口的入口孔和位于第一支撑构件的第二支撑构件。 这些第一和第二支撑构件保持用于级联乘法和阳极的电子倍增部分。 电子倍增部分包括至少第一倍频器的盒型和第二倍增电极，其具有反射型二次电子发射表面，该反射型二次电子发射表面定位成面对第一倍增电极并被布置成从第一倍增电极接收二次电子并且发射次级 电子到第一倍增电极所在的一侧。 阳极位于从第一倍增电极发射的二次电子不直接到达的位置，并且第二倍增极改变二次电子的行进路径，以便保持在第一和第二支撑构件之间的空间中。

公开(公告)号：US07495392B2

公开(公告)日：2009-02-24

申请号：US11182080

申请日：2005-07-15

申请人： Kimitsugu Nakamura ,  Yousuke Oohashi ,  Keiichi Ohishi ,  Masuo Ito

发明人： Kimitsugu Nakamura ,  Yousuke Oohashi ,  Keiichi Ohishi ,  Masuo Ito

IPC分类号： H01J43/04

CPC分类号： H01J43/22 ,  H01J43/18 ,  H01J43/26

摘要： This invention relates to an electron multiplier unit and others enabling cascade multiplication of electrons through successive emission of secondary electrons in multiple stages in response to incidence of primary electrons. The electron multiplier unit has a first support member provided with an inlet aperture for letting primary electrons in, and a second support member located so as to face the first support member. The first support member is provided with a focusing electrode functioning to alter trajectories of the primary electrons, in order to guide the primary electrons to the inlet aperture. These first and second support members hold an electron multiplication section for the cascade multiplication and an anode. The electron multiplication section comprises at least a first dynode of a box type and a second dynode having a reflection type secondary electron emission surface located so as to face the first dynode and arranged to receive secondary electrons from the first dynode and to emit secondary electrons to a side where the first dynode is located. The anode is located at a position where the secondary electrons emitted from the first dynode do not directly arrive, and the second dynode alters a travel path of secondary electrons so as to be kept in a space between the first and second support members.

摘要翻译： 本发明涉及电子倍增器单元和其它能够响应于初级电子的入射而以多级连续发射二次电子的电子级联乘法。 电子倍增器单元具有第一支撑构件，该第一支撑构件设置有用于使一次电子入口的入口孔和位于第一支撑构件的第二支撑构件。 第一支撑构件设置有用于改变初级电子的轨迹的聚焦电极，以便将一次电子引导到入口孔。 这些第一和第二支撑构件保持用于级联乘法和阳极的电子倍增部分。 电子倍增部分至少包括箱型的第一倍增极和具有反射型二次电子发射表面的第二倍增电极，所述反射型二次电子发射表面定位成面对第一倍增电极并被布置成从第一倍增电极接收二次电子并且发射二次电子 第一个倍极管所在的一侧。 阳极位于从第一倍增电极发射的二次电子不直接到达的位置，并且第二倍增极改变二次电子的行进路径，以便保持在第一和第二支撑构件之间的空间中。

公开(公告)号：US07492097B2

公开(公告)日：2009-02-17

申请号：US11080665

申请日：2005-03-16

申请人： Kimitsugu Nakamura ,  Yousuke Oohashi ,  Keiichi Ohishi ,  Masuo Ito

发明人： Kimitsugu Nakamura ,  Yousuke Oohashi ,  Keiichi Ohishi ,  Masuo Ito

IPC分类号： H01J43/04

CPC分类号： H01J43/22 ,  H01J43/18 ,  H01J43/26

摘要： This invention relates to an electron multiplier unit and others enabling cascade multiplication of electrons through successive emission of secondary electrons in multiple stages in response to incidence of primary electrons. The electron multiplier unit has a first support member provided with an inlet aperture for letting primary electrons in, and a second support member located so as to face the first support member. These first and second support members hold an electron multiplication section for the cascade multiplication and an anode. The electron multiplication section is comprised of at least a first dynode of a box type and a second dynode having a reflection type secondary electron emission surface located so as to face the first dynode and arranged to receive secondary electrons from the first dynode and to emit secondary electrons to a side where the first dynode is located. The anode is located at a position where the secondary electrons emitted from the first dynode do not directly arrive, and the second dynode alters a travel path of secondary electrons so as to be kept in a space between the first and second support members.

摘要翻译： 本发明涉及电子倍增器单元和其它能够响应于初级电子的入射而以多级连续发射二次电子的电子级联乘法。 电子倍增器单元具有第一支撑构件，该第一支撑构件设置有用于使一次电子入口的入口孔和位于第一支撑构件的第二支撑构件。 这些第一和第二支撑构件保持用于级联乘法和阳极的电子倍增部分。 电子倍增部分包括至少第一倍频器的盒型和第二倍增电极，其具有反射型二次电子发射表面，该反射型二次电子发射表面定位成面对第一倍增电极并被布置成从第一倍增电极接收二次电子并且发射次级 电子到第一倍增电极所在的一侧。 阳极位于从第一倍增电极发射的二次电子不直接到达的位置，并且第二倍增极改变二次电子的行进路径，以便保持在第一和第二支撑构件之间的空间中。

公开(公告)号：US5189338A

公开(公告)日：1993-02-23

申请号：US818282

申请日：1992-01-09

申请人： Keiichi Ohishi ,  Suenori Kimura

发明人： Keiichi Ohishi ,  Suenori Kimura

IPC分类号： H01J43/22 ,  H01J43/04 ,  H01J43/06 ,  H01J43/26

CPC分类号： H01J43/06 ,  H01J43/04

摘要： A photomultiplier tube includes a tube, a focussing electrode unit formed with a photoelectron transmission hole whose center is positioned offset from a central axis of the tube and a dynode positioned in confrontation with the transmission hole. A center of the dynode is also offset from the central axis of the tube. A grid type electrodes array are positioned at the same axial position of the dynode and positioned beside the dynode in a radial direction of the tube. The focussing electrode provides desirable uniformity in distribution of photoelectronics over the dynode even by the deviating position of the photoelectron transmission hole and the dynode. By positioning the dynode away from the central axis in the radial direction of the tube, the grid type electrode array can be positioned beside the dynode. Thus, entire length of the tube can be reduced without any change in a diameter of the tube because of the fact that a length of the dynode in the axial direction of the tube only influences the axial length of the tube.

公开(公告)号：US5371435A

公开(公告)日：1994-12-06

申请号：US983281

申请日：1992-11-30

申请人： Keiichi Ohishi ,  Hideaki Suzuki ,  Hiroyuki Watanabe ,  Junichi Takeuchi

发明人： Keiichi Ohishi ,  Hideaki Suzuki ,  Hiroyuki Watanabe ,  Junichi Takeuchi

IPC分类号： H01J9/12 ,  H01J43/08 ,  H01J43/04

CPC分类号： H01J9/12 ,  H01J43/08 ,  H01J2201/3426

摘要： There is disclosed a process for forming a photocathode having high quantum yield which comprises the first step of making a number of fine concavities and convexities in a surface of a substrate finished substantially in a mirror; the second step of blunting the fine concavities and convexities; and the third step of coating a photoelectron emissive material on the surface of the substrate.

摘要翻译： 公开了一种形成具有高量子产率的光电阴极的方法，该方法包括：在基材表面基本形成反射镜的基板的表面上形成多个精细凹凸的第一步骤; 打破精细的凹凸的第二步; 以及在基板的表面上涂覆光电子发射材料的第三步骤。

公开(公告)号：US5442179A

公开(公告)日：1995-08-15

申请号：US122957

申请日：1993-09-20

申请人： Keiichi Ohishi

发明人： Keiichi Ohishi

IPC分类号： H01J43/04 ,  G01T1/164 ,  G01T1/20 ,  H01J43/28

CPC分类号： H01J43/28 ,  G01T1/1642 ,  G01T1/2002 ,  A61B6/4258

摘要： A photomultiplier assembly for use in gamma cameras, for example, includes an array of head-on type photomultipliers disposed in parallel relation to one another. The array of photomultipliers has a plurality of dead spaces, in which reflectors are respectively disposed. The reflector can reflect light which has entered the corresponding dead space to an upper portion of a side wall of aproximate photomultiplier. A side photocathode surface is formed on an inside surface of the upper portion of the side wall of the photomultiplier. Therefore, the light which has entered the dead space is reflected by the reflector and impinges on the side photocathode surface to be converted into photoelectrons.

摘要翻译： 例如，用于γ照相机的光电倍增器组件包括彼此平行设置的前置式光电倍增管阵列。 光电倍增管阵列具有多个死空间，其中反射器分别设置在其中。 反射器可以将进入相应死区的光反射到近似光电倍增管的侧壁的上部。 侧光电阴极表面形成在光电倍增管的侧壁的上部的内表面上。 因此，进入死区的光被反射体反射并照射在侧面光电面以转换成光电子。