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公开(公告)号：US4776679A
公开(公告)日：1988-10-11
申请号：US872139
申请日：1986-06-09
IPC分类号： G02B15/14 , G02B3/00 , G02B15/16 , G02B15/173
CPC分类号： G02B15/173
摘要： A variable focal length objective of which at least one of a pulrality of lens units is moved to vary the image magnification, wherein at least one of the plurality of lens units has at least one refractive index distribution type lens provided with a condition of N.sub.1 >0 as, taking the distance from the optical axis to a radial direction as h, the refractive index distribution is expressed by N(h)=N.sub.0 +N.sub.1 h.sup.2 +N.sub.2 h.sup.4 +N.sub.3 h.sup.6 +. . . (N.sub.0, N.sub.1, N.sub.2 . . . are constants), and satisfies the following conditions: ##EQU1## where fmax: the maximum focal length;fmin: the minimum focal length;Lmin: the optical total length when the total length is shortest;Y: the maximum image height;N.sub.1 *: the coefficient of h.sup.2 of the refractive index distribution type lens having a refractive index distribution of N.sub.1 >0;D*: the lens thickness of the refractive index distribution type lens having the refractive index distribution of N.sub.1 >0.
摘要翻译： 可变焦距物镜，其中移动透镜单元的脉冲中的至少一个以改变图像放大率，其中多个透镜单元中的至少一个具有至少一个折射率分布型透镜，其具有N1> 0，从光轴到径向的距离为h，折射率分布由N（h）= N0 + N1h2 + N2h4 + N3h6 +表示。 。 。 （N0，N1，N2 ...是常数），满足以下条件：
SIGMA 2N1 * D *> 0.2 / fmin其中fmax：最大焦距; fmin：最小焦距; Lmin：总长度最短时的光学总长度; Y：最大图像高度; N1 *：折射率分布为N1> 0的折射率分布型透镜的h2的系数; D *：折射率分布为N1> 0的折射率分布型透镜的透镜厚度。 -
公开(公告)号：US5054898A
公开(公告)日：1991-10-08
申请号：US800553
申请日：1985-11-21
IPC分类号： G02B15/08
CPC分类号： G02B15/08
摘要： A zoom lens comprising a plurality of lens units in which at least one of the air separations between the units is varied to effect zooming, whereby at least one of the plurality of lens units is included with at least one refractive index distribution type lens element on a common optical axis of the other elements.
摘要翻译： 一种变焦透镜，包括多个透镜单元，其中，所述单元中的空气分离中的至少一个被改变以实现变焦，由此多个透镜单元中的至少一个透镜单元包括至少一个折射率分布型透镜元件 其他元素的共同光轴。
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公开(公告)号：US4907866A
公开(公告)日：1990-03-13
申请号：US847236
申请日：1986-04-02
IPC分类号： G02B15/177
CPC分类号： G02B15/177
摘要： An objective of variable focal length includes a plurality of lens units of which the first, counting from front, is of negative power and the second is of positive power. At least the first and second lens units are moved with variation of the air separation therebetween to vary the focal length of the entire system. The objective is characterized in that at least one of the lens units is included with at least one refractive index distribution type lens arranged on the common optical axis of the other lenses.
摘要翻译： 可变焦距的目的包括多个透镜单元，其中第一个从前面计数是负功率的，第二个具有正的功率。 至少第一和第二透镜单元随着它们之间的空气间隔的变化而移动，以改变整个系统的焦距。 其目的在于，透镜单元中的至少一个包括配置在其它透镜的公共光轴上的至少一个折射率分布型透镜。
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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：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：US5011272A
公开(公告)日：1991-04-30
申请号：US329588
申请日：1989-03-27
IPC分类号： G02B15/16
CPC分类号： G02B15/161
摘要： A zoom lens including at least two lens units of which the front one is of positive refractive power and the rear one is of negative refractive power, the units being axially movable to decrease their separation in zooming from the wide angle to the telephoto end. At least one of the lens units is provided with at least one refractive index distribution type lens arranged on a common optical axis of the other lenses in order to achieve a great advance in compactness.
摘要翻译： 一种变焦透镜，包括至少两个透镜单元，前者具有正折射光焦度，后一个具有负折光力，该单元可轴向移动以减小其从广角变焦到望远端的分离。 透镜单元中的至少一个设置有至少一个折射率分布型透镜，其布置在其它透镜的公共光轴上，以便实现紧凑性的大的进步。
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公开(公告)号：US4974947A
公开(公告)日：1990-12-04
申请号：US823285
申请日：1986-01-28
申请人： Nozomu Kitagishi , Hiroki Nakayama
发明人： Nozomu Kitagishi , Hiroki Nakayama
CPC分类号： G02B3/0087
摘要： A refractive index distribution type meniscus-shaped single lens characterized in that it has a refractive index distribution in which the refractive index decreases along the optic axis thereof from a convex surface to a concave surface and the difference .DELTA.N in refractive index between the convex surface and the concave surface on the optic axis satisfies .DELTA.N.gtoreq.0.15.
摘要翻译： 一种折射率分布型弯液面状单透镜，其特征在于，其具有其折射率分布，其折射率沿其光轴从凸面向凹面减小，凸面的折射率差ΔTA 并且光轴上的凹表面满足DELTA N> / = 0.15。
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公开(公告)号：US4842395A
公开(公告)日：1989-06-27
申请号：US159471
申请日：1988-02-19
IPC分类号： G02B25/00 , G02B15/16 , G02B15/177 , G02B23/14 , G03B13/12
CPC分类号： G02B15/177 , G02B23/145
摘要： The disclosed variable magnification finder includes, from front to rear, a first lens unit of negative power, a second lens unit of positive power, a third lens unit of positive power, the first, second and third lens units constituting an objective lens of positive power, and an eyepiece of positive power. The first and second lens units form a finder image on a plane just in front of the third lens unit. The second lens unit is moved axially forward to increase the image magnification, while the shift of diopter of the finder is simultaneously compensated for by moving the first lens unit.
摘要翻译： 所公开的可变倍率取景器包括从前到后的负功率的第一透镜单元，正光焦度的第二透镜单元，正光焦度的第三透镜单元，构成正的物镜的第一，第二和第三透镜单元 权力和一个正面力量的目镜。 第一和第二透镜单元在刚好在第三透镜单元前面的平面上形成取景器图像。 第二透镜单元轴向移动以增加图像放大率，同时通过移动第一透镜单元来同时补偿取景器的屈光度偏移。
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9.发明授权Optical imaging system for suppressing the generation of red-toned ghosting particularly when there is background light 失效用于抑制红色重影的产生的光学成像系统，特别是当有背景光时公开(公告)号：US07038722B2
公开(公告)日：2006-05-02
申请号：US10096750
申请日：2002-03-14
申请人： Nozomu Kitagishi
发明人： Nozomu Kitagishi
CPC分类号： G02B27/0018 , G02B5/208 , H04N5/2254
摘要： An optical imaging system suppresses the generation of red-toned ghosting in an image particularly when there is a background light or when a strong light source shines on the screen. The optical imaging system has a reflection-type infrared cut filter comprising a multi-layer film, color filters that selectively transmit light according to the wavelength, and an imaging element. Ghosting is suppressed to inconspicuous levels by adjusting the transmittance of the color filters and the infrared cut filter, and by setting the spectral characteristics of the color filters.
摘要翻译： 光学成像系统抑制在图像中产生红色重影，特别是当存在背景光时或当强光源照射在屏幕上时。 光学成像系统具有反射型红外线截止滤光片，其包括多层膜，根据波长有选择地透过光的滤色器和成像元件。 通过调整滤色器和红外线截止滤光片的透射率，并通过设置滤色器的光谱特性，将重影抑制到不显眼的水平。
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公开(公告)号：US5270857A
公开(公告)日：1993-12-14
申请号：US261231
申请日：1988-10-24
申请人： Kouji Oizumi , Nozomu Kitagishi , Shoichi Yamzaki
发明人： Kouji Oizumi , Nozomu Kitagishi , Shoichi Yamzaki
IPC分类号： G02B27/64
CPC分类号： G02B27/646
摘要： An image stabilizing system includes a photographic lens device having a plurality of lens units, wherein for zooming at least one lens unit separation varies, a detecting circuit for detecting the jiggle of the system, and a drive device for driving at least one lens unit in a direction perpendicular to a photographic optical axis of the photographic lens device on the basis of an output of the detecting circuit to stabilize an image.
摘要翻译： 一种图像稳定系统包括具有多个透镜单元的摄影透镜装置，其中，用于变焦的至少一个透镜单元分离变化，用于检测系统的抖动的检测电路，以及用于驱动至少一个透镜单元的驱动装置 根据检测电路的输出，垂直于摄影透镜装置的摄影光轴的方向，以稳定图像。
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