Modulation transfer function of image tube lenses.
Modulation transfer function of image tube lenses.
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DOI：
10.1364/ao.16.002647
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发表时间：
1977-10
期刊：
影响因子：
1.9
通讯作者：
I. P. Csorba
中科院分区：
文献类型：
--
作者：
I. P. Csorba
推导并给出了近焦双平面透镜和锐聚焦静电电磁透镜的调制传递函数（MTF）。结果表明，对于麦克斯韦发射能量分布，双平面透镜的 MTF 为 MTF = exp(-4pi(2)epsilon/V(s)L(2)F(2))，其中 L 是屏幕到阴极的间距，单位为 mm，f 是空间频率，单位为 lp/mm，V(s) 是屏幕电压，epsilon 是最可能发射能量的电压当量。对于余弦分布，双平面透镜的 MTF 为 MTF = exp(-7 piepsilon/V(s)L(2)f(2))。锐聚焦像管透镜的 MTF 为 MTF = exp(-0.06pi(2)epsilon(2)M(2)f(2)/E(c)(2))，其中 E(c) 是阴极场强，单位为伏特/毫米，M 是放大倍数。一般来说，像管镜头的MTF为MTF = exp[-(pirhof)(2)]，其中rho是特定镜头的聚焦误差系数。
The modulation transfer function (MTF) of the proximity focusing biplanar lens and the sharp focusing electrostatic and electromagnetic lenses is derived and presented. It is shown that for a Maxwellian emission energy distribution, the MTF of the biplanar lens is MTF = exp(-4pi(2)epsilon/V(s)L(2)F(2)), where L is the screen to cathode separation in mm, f is the spatial frequency in lp/mm, V(s), is the screen voltage, and epsilon is the voltage equivalent of the most probable emission energy. For a cosine distribution, the MTF of the biplanar lens is MTF = exp(-7 piepsilon/V(s)L(2)f(2)). The MTF of sharp focusing image tube lenses is MTF = exp(-0.06pi(2)epsilon(2)M(2)f(2)/E(c)(2)), where E(c), is the cathode field strength in volts per mm and M is the magnification. In general, the MTF of image tube lenses is MTF = exp[-(pirhof)(2)], where rho is the focusing error coefficient of a particular lens.