Apparatus for and method of capturing radiation image
    2.
    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。

    Zoom lens
    3.
    发明授权
    Zoom lens 失效
    变焦镜头

    公开(公告)号:US5087988A

    公开(公告)日:1992-02-11

    申请号:US738110

    申请日:1991-07-30

    申请人: Hiroki Nakayama

    发明人: Hiroki Nakayama

    CPC分类号: G02B15/167

    摘要: A zoom lens of simple structure is disclosed comprising, from front to rear, a first lens unit of positive refractive power, a second lens unit of positive refractive power and a third lens unit of negative refractive refractive power, wherein these three lens units each are constructed from a single block, and zooming from the wide-angle end to the telephoto end is performed by moving the first and third lens units axially toward the object side independent of each other.

    摘要翻译: 公开了一种简单结构的变焦透镜,包括从正面到背面的正屈光力的第一透镜单元,正屈光力的第二透镜单元和负折射光焦度的第三透镜单元,其中这三个透镜单元各自为 通过将第一透镜单元和第三透镜单元轴向地朝向物体侧彼此独立地进行,从单个块构造并且从广角端到望远端的放大进行。

    Compact zoom lens
    4.
    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
    5.
    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
    6.
    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。

    ZOOM LENS AND IMAGE PICKUP APPARATUS INCLUDING SAME
    8.
    发明申请
    ZOOM LENS AND IMAGE PICKUP APPARATUS INCLUDING SAME 有权
    变焦镜头和图像拾取装置,包括它们

    公开(公告)号:US20110080652A1

    公开(公告)日:2011-04-07

    申请号:US12895575

    申请日:2010-09-30

    IPC分类号: G02B15/167

    CPC分类号: G02B15/173 G02B13/009

    摘要: A zoom lens includes, in order from an object side to an image side and arranged along an optical axis, first to fifth lens units having positive, negative, positive, positive or negative, and positive refractive power, respectively. When zooming, the second lens unit moves monotonically to the image side, the third lens unit moves to the object side in a convex locus, the fifth lens unit moves nonlinearly, and the first and fourth lens units do not move. The fourth lens unit includes a first sub lens unit and a second sub lens unit; the first sub lens unit is an image-stabilizing lens unit that includes a first lens having negative refractive power and a second lens having positive or negative refractive power. The focal length of the fourth lens unit, the focal length of the entire system at the wide-angle end, the Abbe numbers of the materials of the first and second lenses are set appropriately based on predetermined conditions.

    摘要翻译: 变焦透镜从物体侧到像侧依次沿光轴布置,分别具有正,负,正,正或负和正屈光力的第一至第五透镜单元。 当变焦时,第二透镜单元单调地移动到图像侧,第三透镜​​单元以凸形轨迹移动到物体侧,第五透镜单元非线性移动,第一和第四透镜单元不移动。 第四透镜单元包括第一子透镜单元和第二子透镜单元; 第一子透镜单元是包括具有负折光力的第一透镜和具有正或负折射光焦度的第二透镜的图像稳定透镜单元。 基于预定条件适当地设置第四透镜单元的焦距,广角端处的整个系统的焦距,第一和第二透镜的材料的阿贝数。

    Radiographic image capturing apparatus, radiographic image capturing method, and position calculating method
    9.
    发明申请
    Radiographic image capturing apparatus, radiographic image capturing method, and position calculating method 审中-公开
    射线照相图像拍摄装置,放射线图像拍摄方法和位置计算方法

    公开(公告)号:US20110075791A1

    公开(公告)日:2011-03-31

    申请号:US12923160

    申请日:2010-09-07

    IPC分类号: A61B6/00 G01N23/00

    摘要: A radiographic image capturing apparatus includes a radiation source that outputs radiation, a radiation detector for detecting the radiation and converting such radiation into a radiographic image, and a reference point, which is disposed in a removable manner between the radiation source and the radiation detector. The reference point is disposed at the position of a center of rotation of the radiation source, which is set between the radiation source and the radiation detector. By rotating the radiation source about the position of the center of rotation, the radiation source applies radiation with respect to the reference point from at least two different angles.

    摘要翻译: 射线照相图像拍摄装置包括输出辐射的辐射源,用于检测辐射并将这种辐射转换成放射线照相图像的辐射检测器以及以可移除的方式设置在辐射源和辐射检测器之间的参考点。 参考点设置在放射源和放射线检测器之间的辐射源的旋转中心的位置。 通过围绕旋转中心的位置旋转辐射源,辐射源从至少两个不同的角度相对于参考点施加辐射。