Objective of variable focal length
    1.
    发明授权
    Objective of variable focal length 失效
    可变焦距的目的

    公开(公告)号:US4776679A

    公开(公告)日:1988-10-11

    申请号:US872139

    申请日:1986-06-09

    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。

    Compact zoom lens
    2.
    发明授权
    Compact zoom lens 失效
    紧凑型变焦镜头

    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。

    Refractive index distribution type meniscus lens and optics
    3.
    发明授权
    Refractive index distribution type meniscus lens and optics 失效
    折射率分布型弯月透镜和光学元件

    公开(公告)号:US4974947A

    公开(公告)日:1990-12-04

    申请号:US823285

    申请日:1986-01-28

    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。

    Finder of variable magnification
    4.
    发明授权
    Finder of variable magnification 失效
    Finder的可变放大倍数

    公开(公告)号:US4842395A

    公开(公告)日:1989-06-27

    申请号:US159471

    申请日:1988-02-19

    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。

    Objective of variable focal length
    6.
    发明授权
    Objective of variable focal length 失效
    可变焦距的目的

    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。

    Variable focal length objective
    7.
    发明授权
    Variable focal length objective 失效
    可变焦距目标

    公开(公告)号:US4842386A

    公开(公告)日:1989-06-27

    申请号:US877102

    申请日:1986-06-23

    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。

    Apparatus for and method of capturing radiation image
    10.
    发明授权
    Apparatus for and method of capturing radiation image 有权
    用于捕获辐射图像的装置和方法

    公开(公告)号:US07400707B2

    公开(公告)日:2008-07-15

    申请号:US11704944

    申请日:2007-02-12

    IPC分类号: H05G1/44 H05G1/42 A61B6/04

    摘要: Before a radiation image is captured, a rate of change of an output signal from an integrator, during a given period of time after the integrator has been reset and until a radiation start signal is supplied, is calculated. An offset voltage signal at a desired time is calculated using the rate of change, and is supplied to a voltage correcting circuit. An output signal from the integrator after a radiation X has started being applied to a subject is corrected based on the calculated offset voltage signal. The corrected output signal from the integrator is supplied to an X-ray tube controller for controlling application of the radiation X to the subject.

    摘要翻译: 在拍摄放射线图像之前,计算在积分器被复位之后的给定时间段内并且直到提供辐射开始信号时来自积分器的输出信号的变化率。 使用变化率来计算期望时间的偏移电压信号,并将其提供给电压校正电路。 基于计算出的偏移电压信号来校正在辐射X开始施加到被摄体之后来自积分器的输出信号。 来自积分器的经校正的输出信号被提供给X射线管控制器,用于控制对被摄体的辐射X的施加。