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公开(公告)号：US4871238A
公开(公告)日：1989-10-03
申请号：US19687
申请日：1987-02-27
申请人： Yasuhisa Sato , Yasuyuki Yamada , Hiroki Nakayama , Kouji Oizumi
发明人： Yasuhisa Sato , Yasuyuki Yamada , Hiroki Nakayama , Kouji Oizumi
IPC分类号： G02B15/10
CPC分类号： G02B15/10
摘要： A photographic optical device of this invention comprises: a master lens unit having a positive refractive power, determining a photographic optical path and moving along the optical axis to change magnification; a first auxiliary lens unit having a positive refractive power and being capable of being placed on and off the optical path; and a second auxiliary lens unit having a negative refractive power and being capable of being placed on and off the optical path. The first auxiliary lens unit is attached to an image-plane side of the master lens unit to form a photographic unit giving a low ratio of magnification. The second auxiliary lens unit is attached to an image-plane side of the master lens unit to form another photographic unit giving a high ratio of magnification. The first and second auxiliary lens units are placed outside of the optical path to form another photographic unit giving a middle ratio of magnification.
摘要翻译： 本发明的照相光学装置包括：主透镜单元，具有正的折光力，确定照相光路并沿着光轴移动以改变放大率; 第一辅助透镜单元，具有正的折光力并且能够放置在光路上或从光路上放置; 以及具有负屈光力并且能够放置在光路上和从光路上的第二辅助透镜单元。 第一辅助透镜单元附接到主透镜单元的图像平面侧，以形成具有低倍率的照相单元。 第二辅助透镜单元附接到主透镜单元的像平面侧，以形成另一个具有高倍率比的照相单元。 第一辅助透镜单元和第二辅助透镜单元被放置在光路外部，以形成另一个具有中等比例的照相单元。
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公开(公告)号：US4842386A
公开(公告)日：1989-06-27
申请号：US877102
申请日：1986-06-23
IPC分类号： G02B15/163 , G02B15/16 , G02B15/173
CPC分类号： G02B15/173
摘要： A variable focal length objective having a plurality of lens units with at least one unit separation being varied to vary the focal length of the entire system, in which at least one of the plurality of lens units has at least gradient-index lens having a refractive index distribution of the form: N(h)=N.sub.0 +N.sub.1 h.sup.2 +N.sub.2 h.sup.4 +N.sub.3 h.sup.6 + . . . where h is the height from the optical axis, N.sub.0 is the refractive index on the optical axis, and N.sub.1, N.sub.2, N.sub.3, . . . are constants, satisfying the following conditions:.phi..sub.G .multidot.N.sub.1
摘要翻译： 具有具有至少一个单位间隔的多个透镜单元的可变焦距物镜被改变以改变整个系统的焦距，其中多个透镜单元中的至少一个具有至少具有折射率的梯度折射率透镜 形式的索引分布：N（h）= N0 + N1h2 + N2h4 + N3h6 +。 。 。 其中h是光轴的高度，N0是光轴上的折射率，N1，N2，N3。 。 。 是满足以下条件的常数：phi GxN1 <0 Kx phi GxN2 <0其中，phi G是具有该梯度折射率透镜的透镜单元的屈光度，并且当曲率越强时，K为+1或-1 该梯度折射率透镜的两个表面分别对空气是凸的或凹的。
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公开(公告)号：US4815830A
公开(公告)日：1989-03-28
申请号：US643820
申请日：1984-08-23
申请人： Yasuhisa Sato , Yasuyuki Yamada , Hiroki Nakayama
发明人： Yasuhisa Sato , Yasuyuki Yamada , Hiroki Nakayama
CPC分类号： G02B15/161
摘要： A zoom lens including a first lens unit of positive power and a second lens unit of negative power with the axial separation therebetween varies to bring about zooming. The first lens unit includes at least one positive lens and at least one negative lens and the second lens unit consists of a forwardly concave negative meniscus lens, thereby making the lens system small.
摘要翻译： 包括正功率的第一透镜单元和具有轴向间隔的负功率的第二透镜单元的变焦透镜之间变化，以实现变焦。 第一透镜单元包括至少一个正透镜和至少一个负透镜，并且第二透镜单元由前凹凹负弯月透镜组成，从而使透镜系统较小。
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公开(公告)号：US4810070A
公开(公告)日：1989-03-07
申请号：US901059
申请日：1986-08-26
IPC分类号： G02B9/00 , G02B3/00 , G02B9/02 , G02B15/16 , G02B15/167 , G02B15/173 , G02B15/14
CPC分类号： G02B3/0087 , G02B15/16
摘要： A lens system has a lens unit comprising a positive lens and a negative lens. The positive lens has an index distribution in the direction of the optic axis. The value of the index gradient for a light having a short wavelength in the vicinity of the vertex of at least one convex surface of the positive lens is smaller than the value of the index gradient for a light having a long wavelength.
摘要翻译： 透镜系统具有包括正透镜和负透镜的透镜单元。 正透镜在光轴方向上具有折射率分布。 在正透镜的至少一个凸面的顶点附近具有短波长的光的折射率梯度的值小于具有长波长的光的折射率梯度的值。
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公开(公告)号：US4757336A
公开(公告)日：1988-07-12
申请号：US820626
申请日：1986-01-21
申请人： Hiroki Nakayama , Yasuhisa Sato , Kouji Oizumi , Yasuyuki Yamada
发明人： Hiroki Nakayama , Yasuhisa Sato , Kouji Oizumi , Yasuyuki Yamada
CPC分类号： G02B25/001 , G02B15/177 , G02B23/145
摘要： A view finder having, from front to rear, a first lens unit of negative power, a second lens unit of positive power and a third lens unit of negative power, the second lens unit being moved axially forward as the magnification varies from the smallest to the largest value, while the first lens unit is moved to compensate for the diopter shift resulting from the variation of the magnification.
摘要翻译： 具有从前到后具有负功率的第一透镜单元，正功率的第二透镜单元和负功率的第三透镜单元的取景器，所述第二透镜单元随着所述放大率从最小到 最大值，同时移动第一透镜单元以补偿由放大率变化引起的屈光度偏移。
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公开(公告)号：US4695134A
公开(公告)日：1987-09-22
申请号：US678222
申请日：1984-12-05
申请人： Hiroki Nakayama , Yasuhisa Sato , Yasuyuki Yamada
发明人： Hiroki Nakayama , Yasuhisa Sato , Yasuyuki Yamada
摘要： The disclosed compact photographic lens includes, from front to rear, a positive meniscus-shaped first lens unit convex toward the front, a negative aspheric second lens unit concave toward the front, a bi-concave third lens unit, and a negative fourth lens unit with its front surface concave toward the front. The lens satisfies the following conditions:-3.5
摘要翻译： 所公开的紧凑型摄影镜头包括从前到后的朝向前方凸起的正弯月形第一透镜单元，朝向前方凹入的负非球面第二透镜单元，双凹第三透镜单元和负第四透镜单元 其前表面朝向前方凹入。 透镜满足以下条件：-3.5
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公开(公告)号：US4659186A
公开(公告)日：1987-04-21
申请号：US709445
申请日：1985-03-08
申请人： Yasuhisa Sato , Yasuyuki Yamada , Hiroki Nakayama
发明人： Yasuhisa Sato , Yasuyuki Yamada , Hiroki Nakayama
IPC分类号： G02B13/02 , G02B13/18 , G02B15/16 , G02B15/163 , G02B15/173 , G02B9/62 , G02B15/14
CPC分类号： G02B15/173
摘要： The disclosed zoom lens is constructed with a front lens group including, from front to rear, a positive lens unit, a negative lens unit and a positive lens unit having a positive overall refractive power. A rear lens group having a negative overall refractive power arranged on the image side of the front lens group moves axially along with the front lens group in differential relation. The rear lens group is constructed with a negative front lens having a glass relatively large Abbe number and a positive rear lens having a glass of relatively small Abbe number to achieve good stability of chromatic aberration correction against zooming.
摘要翻译： 所公开的变焦镜头由具有正透镜单元，负透镜单元和具有正的总折射光焦度的正透镜单元的前后透镜组构成。 具有布置在前透镜组的像侧的具有负的总折射力的后透镜组与前透镜组沿差动关系移动。 后透镜组由具有玻璃相对较大的阿贝数的负前透镜和具有相对较小的阿贝数的玻璃的正后透镜构成，以实现对变形的色像差校正的良好稳定性。
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公开(公告)号：US4652091A
公开(公告)日：1987-03-24
申请号：US752139
申请日：1985-07-03
申请人： Kouji Oizumi , Yasuhisa Sato , Yasuyuki Yamada , Hiroki Nakayama
发明人： Kouji Oizumi , Yasuhisa Sato , Yasuyuki Yamada , Hiroki Nakayama
IPC分类号： G02B15/16 , G02B15/173 , G02B15/20 , G02B15/14
CPC分类号： G02B15/173
摘要： A compact zoom lens is constructed with, from front to rear, first, second and third lens units of positive, negative and positive refractive powers, respectively. A diaphragm is positioned in or adjacent the second lens unit. The second lens unit and the diaphragm are stationary. When zooming from the wide angle end to the telephoto end, the first and third lens units are axially moved in such a manner that each of the separations between the first and second lens units and between the second and third lens units is increased monotonically.
摘要翻译： 分别从前到后构造具有正，负和正屈光力的第一，第二和第三透镜单元的紧凑变焦透镜。 隔膜位于第二透镜单元中或邻近第二透镜单元。 第二透镜单元和隔膜是静止的。 当从广角端到望远端放大时，第一透镜单元和第三透镜单元以这样的方式轴向移动，使得第一和第二透镜单元之间以及第二和第三透镜单元之间的每个分离单调增加。
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公开(公告)号：US4643536A
公开(公告)日：1987-02-17
申请号：US750699
申请日：1985-06-28
申请人： Yasuyuki Yamada , Yasuhisa Sato , Hiroki Nakayama , Kouji Oizumi
发明人： Yasuyuki Yamada , Yasuhisa Sato , Hiroki Nakayama , Kouji Oizumi
CPC分类号： G02B15/02
摘要： A conversion lens upon attachment on the image side of a master lens increases the focal length of the entire system. The conversion lens comprises three components of negative, positive and negative powers in this order from the front, has a negative power as a whole, and satisfies the following conditions:2.0 0.15where fi and ni are the focal length and the refractive index of the glass of the i-th component counting from the front respectively.
摘要翻译： 安装在主镜头的像侧上的转换镜头增加了整个系统的焦距。 转换透镜从前方按顺序具有负，负和负功率的三个分量，整体具有负功率，满足以下条件：2.0
0.15其中fi和ni分别是从前面计数的第i个分量的焦距和玻璃的折射率。
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