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公开(公告)号:US4396841A
公开(公告)日:1983-08-02
申请号:US276375
申请日:1981-06-16
摘要: A device for scanning a beam of charged particles comprises longitudinal and cross-sectional scanning electromagnets (1,4) to deflect the beam, respectively, lengthwise and crosswise over the exit window (2), longitudinal and cross-sectional scanning current generators (5, 6) to energize the respective electromagnets (1, 4), and a variable delayer (7) connected between the longitudinal scanning current generator (5) and the synchronizing input of the cross-sectional scanning current generator (6) so that pulses arrive at the input of the variable delayer (7) at the moments when current in the windings of the electromagnet (1) reaches its peak. The variable delayer (7) provides N delay times different from each other by a value of .DELTA. t and set in succession as the pulses arrive at its input, the values N and .DELTA. t being determined from the following relationships:.DELTA.t.ltoreq.d/2f.sub.1 L; N.gtoreq.1/f.sub.2 .DELTA.twhered--diameter of the charged particle beam,f.sub.1 --frequency of the longitudinal scanning,f.sub.2 --frequency of the cross-sectional scanning,L--value of maximum deflection of the beam along the length of the exit window.
摘要翻译: PCT No.PCT / SU79 / 00098 Sec。 371日期1981年6月16日第 102(e)日期1981年6月16日PCT提交1979年10月18日PCT公布。 出版物WO81 / 0122800 用于扫描带电粒子束的装置包括纵向和横截面的扫描电磁体(1,4),以分别沿出射窗(2)纵向和横向偏转光束,纵向和横向 用于对各个电磁体(1,4)进行通电的分段扫描电流发生器(5,6)和连接在纵向扫描电流发生器(5)和横截面扫描电流发生器的同步输入端之间的可变延迟器(7) (6),使得脉冲在电磁体(1)的绕组中的电流达到其峰值的时刻到达可变延迟器(7)的输入端。 可变延迟器(7)通过DELTA t的值提供不同的N个延迟时间,并且随着脉冲到达其输入端而连续设置,根据以下关系确定值N和DELTA t:DELTA t < d / 2f1L; N> / = 1 / f2 DELTA t其中带电粒子束的d直径,纵向扫描的f1频率,横截面扫描的f2频率,沿着长度的波长的最大偏转的L值 出口窗口。
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公开(公告)号:US4390816A
公开(公告)日:1983-06-28
申请号:US200226
申请日:1980-10-23
申请人: Milton L. Noble , William G. Hoefer
发明人: Milton L. Noble , William G. Hoefer
CPC分类号: H01J31/38 , H01J3/28 , H04N3/2335
摘要: A scan corrected vidicon camera apparatus utilizing a spatial reference filter with an array of slits that is fitted directly on the faceplate of a vidicon tube. The spatial reference filter is used in conjunction with perturbations that are injected into the vertical and horizontal sweeps. The resultant video waveform is correlated in a microprocessor unit to linearize the respective sweeps.
摘要翻译: 一种扫描校正的摄像机摄像装置,利用具有直接安装在摄像管的面板上的狭缝阵列的空间参考滤光片。 空间参考滤波器与注入垂直和水平扫描的扰动结合使用。 所得到的视频波形在微处理器单元中相关,以使各扫描线性化。
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