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    • 4. 发明授权
    • Television camera tube having channeled photosensitive target spaced
from signal electrode
    • 电视摄像机管具有与信号电极间隔开的通道光敏目标
    • US4025814A
    • 1977-05-24
    • US612250
    • 1975-09-10
    • Paulus Philippus Maria SchampersMarino Giuseppo CarassoArthur Marie Eugene Hoeberechts
    • Paulus Philippus Maria SchampersMarino Giuseppo CarassoArthur Marie Eugene Hoeberechts
    • H01J31/28H01J29/39H01J29/45H01J31/40H01J31/44
    • H01J31/40H01J29/395H01J29/45
    • A television camera tube having a discrete structure of photosensitive elements provided on an electrically conductive carrier covered entirely with photoconductive material or another resistance material, so that with a suitable potential applied to the carrier a potential distribution occurs having successive saddle points for the scanning beam. Variation and exposure of the discrete photoconductive elements then results in a variation in beam splitting in the saddle points, as a result of which the tube has a greater or smaller extent of natural amplification.The invention relates to a television camera tube having a target which is to be scanned by an electron beam and which comprises a transparent electrically conductive signal electrode and discrete structure of photosensitive elements provided on an electrically conductive carrier.Such a camera tube is known from the U.S. Pat. No. 3,649,866, It is the object of the camera tube described in said Specification to provide a storage tube which, with a control suitable for that purpose, can store an image up to several days. In order to achieve this, an electrically conductive mesh structure is covered with photoconductive material on the side remote from the electron source. By local differences in exposure of said structure, a larger or smaller part of the scanning electron beam is passed to the signal electrode and hence a beam splitting introduced by the beam acceptance of the target occurs which is also influenced by the extent of exposure of the photoconductive structure. Because the electrically conductive mesh structure is left uncovered on the side facing the electron source, the operation of said tube will not be optimum.It is the object of the invention to provide a television camera tube with which an adjustable natural amplification can be realized while using the beam acceptance of the target. To be considered, for example, is a natural amplification of a decade.For that purpose, a television camera tube of the kind mentioned in the preamble is characterized according to the invention in that the structure of photosensitive elements is provided on an electrically conductive carrier, in which, except for the signal electrode, no electrically conductive material which is directly visible for the electron beam is added and with which, in cooperation with the signal electrode, a potential field is adjustable which, proceeding in the direction of movement of the scanning electron beam, shows at least two successive saddle points in which the scanning electron beam experiences a local beam splitting which is a function of potentials to be applied externally and of local exposure of the target.Since in a television camera tube according to the invention the inertia is adjustable by applying potentials suitable for that purpose, the tube may be used at will as a normal television camera tube having an inertia and sensitivity which is normal for that purpose or, by the natural amplification to be realized, as an extra sensitive tube having a comparatively large inertia. The latter is favourable for making television scenes in spaces where, for external reasons, a comparatively low light level is desired. The further operation and apparatus of a television camera having a camera tube according to the invention need not experience any drastic alterations in contrast with solutions having a separate image amplification.The structure of photosensitive elements may be provided, for example, on an electrically conductive mesh grid arranged between the mesh electrode of the electron gun and the signal electrode. The photoconductive material is provided on the side of said grid facing the signal electrode. The remaining part of the grid wires is covered with a resistance material. The photosensitive structure may also be provided in a disk of semiconductive material which in the tube occupies a position corresponding to the said grid. The photosensitive structure may also be provided in the form of a line pattern or a mosaic of discrete elements on an electric conductor which is also discrete. Said conductor may be provided directly on the signal electrode, if desired with the addition of a separation layer, and that with such a structure that, when external potentials suitable for that purpose are applied, two saddle points occur in the potential field.
    • 一种电视摄像机管,其具有设置在导电载体上的感光元件的分立结构,该导电载体整体上覆盖有光电导材料或另一种电阻材料,使得在施加到载体上的合适电位下,发生具有用于扫描光束的连续鞍点的电势分布。 离散的光电导元件的变化和曝光然后导致鞍点中的光束分裂的变化,其结果是管具有更大或更小的自然放大的程度。
    • 10. 发明授权
    • Smoothing optical cathode ray tube
    • 平滑光电阴极射线管
    • US3814979A
    • 1974-06-04
    • US29368372
    • 1972-09-29
    • ITT
    • EBERHARDT E
    • H01J31/44H01J31/48
    • H01J31/44H01J31/48
    • An image dissector is combined with an optical cathode ray tube to provide detection and observation of very short duration low level pulses of light. The cathode ray tube includes a photocathode, accelerating grid, fast sweep deflection electrodes and focusing coils to direct electrons onto a slow decay phosphor screen. This is optically coupled to the image dissector having another photocathode, low frequency sweep deflection coils, focusing coils and a scanning aperture which directs electrons into a multiplier for connection to a display or utilization device. The phosphor screen provides temporary storage of short duration light pulses while the slow scan dissector provides discrete output signal pulses of amplitudes proportional to brightness. The device has a sensitivity capable of detecting single photons with a time resolution in the order of picoseconds.
    • 图像解析器与光阴极射线管组合以提供非常短持续时间的低电平脉冲光的检测和观察。 阴极射线管包括光电阴极,加速栅格,快速扫掠偏转电极和聚焦线圈,以将电子引导到慢衰减荧光屏上。 这光学耦合到具有另一光电阴极的图像解析器,低频扫描偏转线圈,聚焦线圈和将电子引导到用于连接到显示器或利用装置的乘法器的扫描孔。 荧光屏提供短时间光脉冲的暂时​​存储,而慢扫描解析器提供与亮度成比例的离散输出信号脉冲。 该器件具有灵敏度,能够以皮秒的顺序以时间分辨率检测单个光子。