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91. 发明授权

US5764872A Method and system for displaying vector data as stream lines in a space represented by tetrahedral cells 失效
标题翻译：在由四面体细胞表示的空间中显示矢量数据作为流线的方法和系统
公开(公告)号：US5764872A
公开(公告)日：1998-06-09
申请号：US495766
申请日：1995-06-27
申请人： Koji Koyamada , Takayuki Ito
发明人： Koji Koyamada , Takayuki Ito
IPC分类号： G06F17/50 , G06T7/00 , G06T11/20 , G06T17/20 , G06T17/00
CPC分类号： G06T17/20
摘要： A method and apparatus for displaying stream lines in a space are disclosed. First, the space is divided into a plurality of tetrahedral cells. Position data of each vertex of the tetrahedral cells and vector data at each position are collected. A critical point for each tetrahedral cell is then computed. The critical point is within the tetrahedral cell and for which the vector data becomes zero. Using the collected position and vector data, a Jacobian matrix J is calculated when such a critical point is found, and eigenvalues of the Jacobian matrix J are also calculated. Next, the starting point of a stream line within a tetrahedral cell is calculated for each of the eigenvalues by moving a microscopic distance from the critical point. Finally, a stream line is calculated from the starting point, and the stream line is displayed.
摘要翻译：公开了一种用于在空间中显示流线的方法和装置。首先，空间被分成多个四面体单元。收集每个位置的四面体单元和矢量数据的每个顶点的位置数据。然后计算每个四面体单元的临界点。临界点在四面体单元内，向量数据变为零。使用收集的位置和向量数据，当发现这样的临界点时计算雅可比矩阵J，并且还计算雅可比矩阵J的特征值。接下来，通过从临界点移动微观距离，为每个特征值计算四面体单元内的流线的起始点。最后，从起始点计算流线，并显示流线。

92. 发明授权

US5734510A Zoom lens 失效
标题翻译：变焦镜头
公开(公告)号：US5734510A
公开(公告)日：1998-03-31
申请号：US755914
申请日：1996-11-25
申请人： Takayuki Ito
发明人： Takayuki Ito
IPC分类号： G02B15/20 , G02B15/16 , G02B15/14
CPC分类号： G02B15/161
摘要： A zoom lens includes a front lens group and a rear lens group, which satisfies the relationship defined by the formula 1.07
摘要翻译：变焦透镜包括前透镜组和后透镜组，其满足由公式1.07

93. 发明授权

US5706138A Zoom lens system having a high zoom ratio 失效
标题翻译：具有高变焦比的变焦透镜系统
公开(公告)号：US5706138A
公开(公告)日：1998-01-06
申请号：US702044
申请日：1996-08-23
申请人： Tetsuya Abe , Takayuki Ito , Takashi Enomoto
发明人： Tetsuya Abe , Takayuki Ito , Takashi Enomoto
IPC分类号： G02B15/167 , G02B15/17 , G02B15/14
CPC分类号： G02B15/17
摘要： A zoom lens system having a high zoom ratio and a high aperture ratio includes a first lens group having a positive power, a second lens group having a negative power, a third lens group having a negative power, and a fourth lens group having a positive power. The second lens group has a magnification varying function and is moved during a zooming operation. The third lens group has a focus compensating function and is moved during the zooming operation. The fourth lens group has an image forming function and is not moved during the zooming operation.
摘要翻译：具有高变焦比和高开口率的变焦透镜系统包括具有正光焦度的第一透镜组，具有负光焦度的第二透镜组，具有负光焦度的第三透镜组和具有负光焦度的第四透镜组功率。第二透镜组具有倍率变化功能，并且在变焦操作期间移动。第三透镜组具有聚焦补偿功能，并且在变焦操作期间移动。第四透镜组具有图像形成功能，并且在变焦操作期间不移动。

94. 发明授权

US5687028A Zoom lens system 失效
标题翻译：变焦镜头系统
公开(公告)号：US5687028A
公开(公告)日：1997-11-11
申请号：US681505
申请日：1996-07-23
申请人： Takayuki Ito
发明人： Takayuki Ito
IPC分类号： G02B15/16 , G02B15/14 , G02B13/18
CPC分类号： G02B15/161
摘要： A zoom lens system includes a positive first lens group and a negative second lens group in this order from an object side. A distance between the first and second lens groups is varied during a zooming operation. The first lens group consists of a negative first sub-group and a positive second sub-group, in this order from an object side. The negative first sub-group consisting of a negative first lens element, having a concave surface facing toward the object side, and a negative second lens element, having a concave surface that faces toward an image side, in this order from the object side. The negative first sub-group being provided with at least one aspherical surface. The zoom lens system satisfies the following relationships: SF1
摘要翻译：变焦透镜系统从物体侧依次包括正的第一透镜组和负的第二透镜组。在变焦操作期间，第一和第二透镜组之间的距离是变化的。第一透镜组由负面的第一子组和正的第二子组组成，从物体侧开始。从物体侧开始，依次具有朝向物体侧的具有凹面的负第一透镜元件和具有朝向像侧的凹面的负第二透镜元件的负第一子组。负的第一子组设置有至少一个非球面。变焦透镜系统满足以下关系：SF1 <-34

95. 发明授权

US5677798A Image forming lens system 失效
标题翻译：成像透镜系统
公开(公告)号：US5677798A
公开(公告)日：1997-10-14
申请号：US330663
申请日：1994-10-28
申请人： Hiroyuki Hirano , Takayuki Ito , Takashi Iizuka
发明人： Hiroyuki Hirano , Takayuki Ito , Takashi Iizuka
IPC分类号： G02B9/04 , G02B13/18 , G02B9/08
CPC分类号： G02B9/04 , G02B13/18
摘要： An image forming lens system including a positive front lens group, a diaphragm, and a rear lens group, in this order from an object to be imaged. The front lens group is made of optical glass. The rear lens group is made of a single meniscus plastic lens having opposed aspherical lens surfaces with a concave surface adjacent to the diaphragm. The lens system satisfies the following relationships: f.sub.0 .multidot..vertline.1/f.sub.R-1 +1/f.sub.R-2 .vertline.
摘要翻译：从成像对象的顺序构成包括正面透镜组，光圈和后透镜组的成像透镜系统。前镜组由光学玻璃制成。后透镜组由具有相邻的非球面透镜表面的单个弯液面塑料透镜制成，具有与隔膜相邻的凹表面。透镜系统满足以下关系：f0x | 1 / fR-1 + 1 / fR-2 | <0.3-4

96. 发明授权

US5663838A Zoom lens system 失效
标题翻译：变焦镜头系统
公开(公告)号：US5663838A
公开(公告)日：1997-09-02
申请号：US523935
申请日：1995-09-06
申请人： Sachio Hasushita , Takayuki Ito
发明人： Sachio Hasushita , Takayuki Ito
IPC分类号： G02B13/18 , G02B15/16 , G02B15/14
CPC分类号： G02B15/161
摘要： A zoom lens system which includes a positive first lens group and a negative second lens group, arranged in this order from an object side so that a distance between the first and second lens groups is changed to alter the focal length. The first lens group includes a first negative sub-lens group, and a first positive sub-lens group. The first negative sub-lens group includes a first negative lens made of glass, and a second negative lens made of plastic. The first positive sub-lens group includes a positive third lens made of glass. The negative second lens group includes a positive fourth lens made of plastic, and a negative fifth lens made of glass lens, in this order from the object side. The zoom lens system satisfies the following relationships:SF1=(r.sub.1-1 +r.sub.1-2)/(r.sub.1-1 -r.sub.1-2).ltoreq.0;andSF2=(r.sub.2-1 +r.sub.2-2)/(r.sub.2-1 -r.sub.2-2)>0where SF1 designates the shaping factor of the first negative lens, SF2 the shaping factor of the second negative lens, and r.sub.1-j the radius of curvature of the j-th surface of the i-th lens, respectively.
摘要翻译：一种变焦透镜系统，包括从物体侧依次排列的正的第一透镜组和负的第二透镜组，使得第一和第二透镜组之间的距离被改变以改变焦距。第一透镜组包括第一负子透镜组和第一正子透镜组。第一负子透镜组包括由玻璃制成的第一负透镜和由塑料制成的第二负透镜。第一正子透镜组包括由玻璃制成的正第三透镜。负的第二透镜组从物体侧依次包括由塑料制成的正的第四透镜和由玻璃透镜制成的负的第五透镜。变焦透镜系统满足以下关系：SF1 =（r1-1 + r1-2）/（r1-1-r1-2） 0其中，SF1表示第一负透镜的整形系数，SF2表示第二负透镜的整形系数，r1-j表示第i透镜的第j表面的曲率半径，分别。

97. 发明授权

US5602682A Aberration correcting plate for interchangeable lens 失效
标题翻译：用于可互换镜头的畸变校正板
公开(公告)号：US5602682A
公开(公告)日：1997-02-11
申请号：US280549
申请日：1994-07-26
申请人： Takayuki Ito , Takayasu Shishido , Hideto Machii
发明人： Takayuki Ito , Takayasu Shishido , Hideto Machii
IPC分类号： G02B15/02 , G02B3/00
CPC分类号： G02B15/02
摘要： An aberration correcting plate for a compatible interchangeable lens which can be detachably attached to a first camera body having a large resultant thickness of filters provided in front of an image pickup device and to a second camera body having a small resultant thickness of filters provided in front of an image pickup device is mounted to a rear end of the compatible interchangeable lens when the rear end is mounted to the second camera body. The aberration correcting plate is made of a parallel-plate whose refractive index N is greater than 1.7 or a lens of negative power. The sum of the thicknesses of the aberration correcting plate and the filters provided in front of the image pickup device of the second camera body is substantially identical to or smaller than the total thickness of the filters provided in front of the image pickup device of the first camera body.
摘要翻译：一种用于兼容的可互换镜头的像差校正板，其可拆卸地附接到具有设置在图像拾取装置前面的滤光器的大的合成厚度的第一相机主体，以及设置在前面的滤光器的具有较小的滤光片厚度的第二相机主体当后端安装到第二照相机主体时，图像拾取装置安装到兼容可互换镜头的后端。像差校正板由折射率N大于1.7的平行板或负功率的透镜构成。设置在第二照相机机身的图像拾取装置前方的像差校正板和滤光器的厚度的总和大致等于或小于设置在第一照相机的图像拾取装置前面的滤光器的总厚度相机机身。

98. 发明授权

US5568325A Achromatic lens system 失效
标题翻译：消色差透镜系统
公开(公告)号：US5568325A
公开(公告)日：1996-10-22
申请号：US295091
申请日：1994-08-24
申请人： Hiroyuki Hirano , Takayuki Ito
发明人： Hiroyuki Hirano , Takayuki Ito
IPC分类号： G02B13/24 , G02B27/00 , G02B9/14
CPC分类号： G02B27/0025 , G02B13/24
摘要： An achromatic lens system includes in order, from the object side, a front lens group, a chromatic aberration correcting lens group, and a rear lens group. Aberrations, including spherical aberration, coma, astigmatism, curvature of image, as well as axial chromatic aberration of wavelengths from green to red, are substantially corrected by the front lens group and the rear lens group. The axial chromatic aberration of the wavelength blue, caused by the front lens group and the rear lens group, is corrected by the chromatic aberration correcting lens group.
摘要翻译：消色差透镜系统从物体侧依次包括前透镜组，色像差校正透镜组和后透镜组。前透镜组和后透镜组基本上校正了由球面像差，彗差，散光，图像曲率以及从绿色到红色的波长的轴向色差的畸变。由前透镜组和后透镜组引起的波长蓝色的轴向色差由色像差校正透镜组进行校正。

99. 发明授权

US5309278A Real-image variable magnification finder including a light shield between two moving lens groups 失效
标题翻译：包括两个移动透镜组之间的遮光罩的实像可变放大倍数
公开(公告)号：US5309278A
公开(公告)日：1994-05-03
申请号：US952806
申请日：1992-09-28
申请人： Takayuki Ito , Sachio Hasushita
发明人： Takayuki Ito , Sachio Hasushita
IPC分类号： G03B13/12 , G02B15/16 , G02B23/14 , G03B13/06 , G02B13/10 , G02B15/163
CPC分类号： G02B15/16 , G02B23/145
摘要： A real-image variable magnification finder is capable of blocking deleterious rays of light without increasing the lens diameter or the size of the erecting prism even of the view angle is large. The improved finder includes, in order from the object side, objective lens system II, condenser lens III with which the image of the object formed by the objective lens system II is directed to eyepiece lens system V, erecting prism system IV for inverting the image of the object, and eyepiece lens system V, and the objective lens system II comprises at least two zooming groups IIA and IIB that will move along the optical axis and light shielding means A that is provided between the zooming groups for blocking deleterious rays of light.
摘要翻译：即使视角较大，实像可变放大倍数取景器能够阻挡有害光线而不增加透镜直径或竖立棱镜的尺寸。改进的取景器从物体侧依次包括物镜系统II，由物镜系统II形成的物体的图像与其对应于目镜透镜系统V的聚光透镜III，竖立用于反转图像的棱镜系统IV 目镜和目镜系统V，并且物镜系统II包括将沿光轴移动的至少两个放大组IIA和IIB以及设置在缩放组之间用于阻挡有害光线的遮光装置A 。

100. 发明授权

US5280390A Zoom lens system 失效
标题翻译：变焦镜头系统
公开(公告)号：US5280390A
公开(公告)日：1994-01-18
申请号：US800113
申请日：1991-11-29
申请人： Takayuki Ito
发明人： Takayuki Ito
IPC分类号： G02B13/18 , G02B15/16 , G02B15/14 , G02B9/08
CPC分类号： G02B15/16
摘要： A zoom lens system includes, in order from the object side, the first lens group having a positive focal length and the second lens group having a negative focal length. The system performs zooming by changing the distance between the first and second lens groups. The first lens group has a negative lens element on the side closest to the object that has a concave surface of large curvature directed towards the image plane and the first lens group satisfies the specific conditions.
摘要翻译：变焦透镜系统从物体侧依次包括具有正焦距的第一透镜组和具有负焦距的第二透镜组。该系统通过改变第一和第二透镜组之间的距离来执行变焦。第一透镜组在最靠近物体的一侧具有朝向图像平面的具有大曲率的凹面的第一透镜组，并且第一透镜组满足特定条件。

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