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。

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 。

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。

公开(公告)号：US5218477A

公开(公告)日：1993-06-08

申请号：US850938

申请日：1992-03-13

申请人： Takayuki Ito

发明人： Takayuki Ito

IPC分类号： G02B15/20 ,  G02B15/177

CPC分类号： G02B15/177

摘要： The improved zoom lens system comprises, in order from the object side, a negative first lens group to maintain a constant focal position, a positive second lens group to control zooming, and a negative third lens group to operate as a relay lens unit. The third lens group moves towards the object during zooming from the wide-angle position to the middle-angle position and towards the image plane during zooming from the middle-angle position to the narrow-angle position. This three-group lens system is compact in overall size and can suppress the aberrational variations associated with zooming.

摘要翻译： 改进的变焦透镜系统从物体侧依次包括负第一透镜组以保持恒定的焦点位置，正的第二透镜组以控制变焦，以及负的第三透镜组作为中继透镜单元。 在从中角位置到窄角位置变焦期间，第三透镜​​组在从广角位置变焦到中角位置并且朝向像平面变焦时朝向物体移动。 这种三组透镜系统整体尺寸紧凑，可以抑制与变焦相关的像差变化。

公开(公告)号：US5202225A

公开(公告)日：1993-04-13

申请号：US744741

申请日：1991-08-14

申请人： Takeshi Nakamine ,  Takayuki Ito ,  Naoto Matsuda ,  Koki Nakamura ,  Hiroyuki Hirai

发明人： Takeshi Nakamine ,  Takayuki Ito ,  Naoto Matsuda ,  Koki Nakamura ,  Hiroyuki Hirai

IPC分类号： G03C7/305

CPC分类号： G03C7/30511 ,  Y10S430/156 ,  Y10S430/158 ,  Y10S430/16

摘要： Disclosed is a silver halide photographic material comprising a support, having thereon at least one silver halide emulsion layer, wherein there is contained in the silver halide emulsion layer or other hydrophilic colloid layer a compound of which an oxidized form is produced in accordance with development of the silver halide and is capable of releasing a photographically useful group by means of a conjugated addition-elimination mechanism due to an intramolecular nucleophilic group attack.

摘要翻译： 公开了一种卤化银照相材料，其包含载体，其上具有至少一个卤化银乳剂层，其中包含在卤化银乳剂层或其它亲水胶体层中，根据其发展形成氧化形式的化合物 卤化银，并且由于分子内的亲核基团攻击，能够通过共轭加成 - 消除机理释放照相用的基团。

公开(公告)号：US5079137A

公开(公告)日：1992-01-07

申请号：US561551

申请日：1990-08-01

申请人： Toshiki Taguchi ,  Takayuki Ito

发明人： Toshiki Taguchi ,  Takayuki Ito

IPC分类号： G03C8/40

CPC分类号： G03C8/408

摘要： A heat-developable color photographic light-sensitive material capable of giving positive color images having high maximum density, low minimum density, and less strain, comprising at least a light-sensitive silver halide, a binder, a dye-providing non-diffusible compound capable of releasing a diffusible dye on being reduced, and a reducing agent, wherein the light-sensitive material further contains at least one compound represented by the following formula (I), (II), or (III); ##STR1## wherein R.sup.1 and R.sup.2 each represents a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heterocyclic group, with a proviso that R.sup.1 and R.sup.2 each represents a group having no redox activity after its cleavage and R.sup.3 and R.sup.4 each represents a hydrogen atom, a halogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heterocyclic group.

公开(公告)号：US4952039A

公开(公告)日：1990-08-28

申请号：US112171

申请日：1987-10-26

申请人： Takayuki Ito

发明人： Takayuki Ito

IPC分类号： G02B15/20 ,  G02B15/22 ,  G02B15/28

CPC分类号： G02B15/173 ,  G02B15/22

摘要： In a macro-adapted zoom lens system capable of high zoom ratio and which covers wide angles, there is disclosed a lens system comprising, in order from the object side, a first lens group having a positive focal length, a second lens group having a negative focal length, a third lens group having a positive focal length, and a fourth lens group having a positive focal length, the focal length of the overall system being varied by displacing all of the four lens groups, and when zooming is effected by shifting the system from a wide-angle end to a telephoto end, a distance between the first and second lens groups being increased while a distance between the second and third lens groups and a distance between the third and fourth lens groups are decreased, with the first and fourth lens groups being situated closer to the object at the telephoto end than at the wide-angle end. The focusing is normally achieved by means of the first lens group and, when closeup shooting is to be made at a nearer distance, the first lens group is fixed at the telephoto end but the second lens group is displaced toward the object while at least one of the third and fourth lens groups are displaced independently so as to increase the distance between the third and fourth lens groups.

摘要翻译： 在能够实现高变焦比且涵盖广角的宏观变焦透镜系统中，公开了一种透镜系统，其从物体侧依次包括具有正焦距的第一透镜组，第二透镜组具有 负焦距，具有正焦距的第三透镜组和具有正焦距的第四透镜组，整个系统的焦距通过移位所有四个透镜组而变化，并且当通过偏移实现变焦时 该系统从广角端到望远端，第一和第二透镜组之间的距离增加，而第二和第三透镜组之间的距离和第三和第四透镜组之间的距离减小，第一透镜组 并且第四透镜组在远摄端处比在广角端处更靠近物体。 通常通过第一透镜组实现对焦，并且当在更近的距离进行特写拍摄时，第一透镜组固定在远摄端，但是第二透镜组朝向物体移位，而至少一个 第三和第四透镜组的独立位移以增加第三和第四透镜组之间的距离。

公开(公告)号：US4952038A

公开(公告)日：1990-08-28

申请号：US179456

申请日：1988-04-08

申请人： Takayuki Ito

发明人： Takayuki Ito

IPC分类号： G02B15/163

CPC分类号： G02B15/163

摘要： A zoom lens system for use in a compact camera is disclosed which comprises, in order from the object side, a first lens component having a positive focal length, a second lens component having a positive focal length and a third lens component having a negative focal length, and which satisfies the following conditions (A) and (B):(A) when zooming is made from the wide-angle end to the narrow-angle end, all of the first, second and third lens components are displaced toward the object side, with the distance between the first and second lens components being increased while the distance between the second and third lens components is decreased; and(B) the second lens component includes a diaphragm stop and is composed of a first unit that is positioned closer to the object than the diaphragm stop and which has a negative focal length, and a second unit that is positioned closer to the image than the diaphragm stop and which has a positive focal length, the first and second units being adapted to be displaced ensemble.

摘要翻译： 公开了一种用于小型照相机的变焦透镜系统，其包括从物体侧开始具有正焦距的第一透镜部件，具有正焦距的第二透镜部件和具有负焦点的第三透镜部件 长度，并且满足以下条件（A）和（B）：（A）当从广角端到窄角端进行变焦时，所有第一，第二和第三透镜部件都向着 物体侧，第一和第二透镜部件之间的距离增加，同时第二和第三透镜部件之间的距离减小; 和（B）第二透镜部件包括光阑止动件，并且由比隔膜止动件更靠近物体定位的第一单元和具有负焦距的第一单元和位于更靠近图像的第二单元构成 所述隔膜止动件具有正的焦距，所述第一和第二单元适于被移位。

公开(公告)号：US4906077A

公开(公告)日：1990-03-06

申请号：US300885

申请日：1989-01-24

申请人： Takayuki Ito

发明人： Takayuki Ito

IPC分类号： G02B13/18 ,  G02B15/16

CPC分类号： G02B15/161

摘要： In a zoom lens system of the type which includes a first lens group having a positive focal length and a second lens group having a negative focal length and which performs zooming by adjusting the distance between the two lens groups, the first lens group is composed of a first lens unit having a small power and having a positive or negative focal length and a second lens unit having a positive focal length, the first lens unit being of a two-group-two-element composition which comprises, in order from the object side, a first positive meniscus lens element having a convex surface of large curvature directed toward the object and a second meniscus lens element of large thickness that has a concave surface of large curvature on the object side and a convex surface of large curvature on the image plane side.

摘要翻译： 在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的类型的变焦透镜系统中，并且通过调节两个透镜组之间的距离来执行变焦，第一透镜组由 第一透镜单元具有小功率并且具有正或负焦距，以及具有正焦距的第二透镜单元，所述第一透镜单元是两组二元件组成，其包括从所述物体的顺序 具有朝向物体的大曲率的凸表面的第一正弯月形透镜元件和在物体侧具有大曲率的凹面并且在图像上具有大曲率的凸表面的大厚度的第二弯月形透镜元件 平面

公开(公告)号：US4818081A

公开(公告)日：1989-04-04

申请号：US132084

申请日：1987-12-11

申请人： Takayuki Ito

发明人： Takayuki Ito

IPC分类号： G02B15/16 ,  G02B15/14 ,  G02B9/60

CPC分类号： G02B15/161

摘要： An improved high-performance zoom lens system for a compact camera is disclosed. The lens employs a two-group type configuration composed of a first lens group having a positive focal length inclusive of a stop diaphragm and a second lens group having a negative focal length. To reduce the diameters of the lenses in the rear group, the back focus of the overall lens system is made greater than a predetermined value, while yet the overall lens system remains relatively short.

摘要翻译： 公开了一种用于小型相机的改进的高性能变焦透镜系统。 透镜采用由具有正焦距的第一透镜组（包括止挡光圈）和具有负焦距的第二透镜组构成的两组型配置。 为了减小后组中的透镜的直径，使整个透镜系统的后焦点大于预定值，而整个透镜系统保持相对较短。