公开(公告)号：US4652742A

公开(公告)日：1987-03-24

申请号：US822924

申请日：1986-01-24

申请人： Dieter Wauer ,  Herbert Plaschke ,  Otto Butz ,  Josef Ganser

发明人： Dieter Wauer ,  Herbert Plaschke ,  Otto Butz ,  Josef Ganser

IPC分类号： B65H7/12 ,  B65H7/14 ,  G01V8/12 ,  G03B27/58 ,  G01N9/24

CPC分类号： B65H7/125 ,  G03B27/586 ,  B65H2553/41

摘要： An arrangement for determining two or more superimposed film sheets, particularly X-ray film sheets, in a transport after their withdrawal from the film sheet stack, has a light barrier with a light source at one side of the transport path and a photoreceiver at the other side thereof, and an evaluating circuit connected with the photoreceiver for producing a signal corresponding to the presence of two or more sheets and including a computer supplied with a value of the density of a first or test sheet introduced into the light barrier between the light source and the photoreceiver, so that the supplied value serves as a reference signal for measuring the next film sheet.

摘要翻译： 用于确定两个或更多个叠加膜片，特别是X射线胶片的装置，在其从膜片堆叠件退出之后，在传送装置中具有在传送路径的一侧具有光源的光屏障和在该传送路径的一侧的光接收器 与光接收器连接的评估电路，用于产生对应于两个或更多个片材的存在的信号，并且包括计算机，该计算机提供引入到光源中的第一或测试片材的密度值 源和光接收器，使得所提供的值用作用于测量下一个胶片的参考信号。

公开(公告)号：US4284339A

公开(公告)日：1981-08-18

申请号：US965920

申请日：1978-12-04

申请人： Kurt Borowski ,  Josef Ganser

发明人： Kurt Borowski ,  Josef Ganser

IPC分类号： G03B7/083 ,  G03B9/02 ,  G03B9/16 ,  G03B9/62 ,  G03B17/18 ,  G03B7/00 ,  G03B9/06

CPC分类号： G03B7/083 ,  G03B17/18 ,  G03B9/02 ,  G03B9/16 ,  G03B9/62

摘要： Upon exposure initiation, a shutter opens abruptly, an exposure-light diaphragm begins to open progressively, and a control diaphragm, behind whose aperture the light sensor is located, also begins to open progressively. The signal from the light sensor is integrated, and when the requisite total-light amount is reached the shutter falls closed abruptly. Accordingly, the system decides, on its own, what the exposure duration and exposure-light aperture size upon exposure termination will be. The user, however, can modify this fully automatic selection in the sense of longer exposures and smaller aperture, or else shorter exposures and larger aperture, by varying the motion-retarding force supplied by an electromagnetic motion retarder, which controls the speed at which the exposure-light aperture opens up. Prior to exposure initiation, the control aperture is at a minimum, but non-zero size, permitting scene-light-sufficiency measurement. The motion-retarding force is automatically lowered in response to temperature decreases and automatically boosted in response to scene-light increases, to counteract low-temperature slowness of mechanical movements and to prevent the need for unrealizably brief exposure durations. The electromagnetic motion-retarder is not connected to a current source, but instead generates magnetic motion-retarding force in response to movement of inductance-modifying structure in accordance with Lenz' law. When the user wishes to predispose the fully automatic system towards longer or shorter exposure durations or larger or smaller aperture sizes, the light-sufficiency indicator is automatically adjusted to take this into account.

摘要翻译： 曝光开始时，快门突然打开，曝光光膜开始逐渐打开，光传感器所在的光圈后面的控制光圈也开始逐渐打开。 来自光传感器的信号被集成，并且当达到所需的总光量时，快门突然关闭。 因此，系统自身决定曝光终止时的曝光持续时间和曝光光圈的大小。 然而，用户可以通过改变由电磁运动延迟器提供的运动阻力来改变这种全自动选择，这意味着更长的曝光和更小的孔径，或者更短的曝光和更大的光圈，这控制了速度 曝光光圈开启。 在曝光开始之前，控制孔径处于最小但非零尺寸，允许场景光充足的测量。 响应于温度降低自动降低运动阻力，并响应于场景光增加而自动升高运动阻力，以抵消机械运动的低温慢度并防止对不可预测的短暂的曝光持续时间的需要。 电磁运动减速器不连接到电流源，而是根据兰茨定律响应于电感调节结构的移动产生磁性运动阻力。 当用户希望将全自动系统倾向于更长或更短的曝光持续时间或更大或更小的孔径尺寸时，自动调整光线充足指示器以考虑到这一点。