【图像处理】基于POP算法实现实时带电粒子图像重建
matlab源码
1 简介
Photofragment imaging has become one of the mostimportant experimental techniques in the
study of gas-phasemolecular dynamics as it provides a simple method to determine the velocity
vector of photofragments, be it ions, neutrals, or electrons. Experimentally, the expanding
Newtonsphere impinges onto a position sensitive detector, typicallyachieved by accelerating the
output from a pair of multichannel plates onto a phosphor screen and using a charge-
coupleddevice CCD to capture the image produced. For productsthat appear with cylindrical
symmetry, which is the case withthe majority of photodissociation, photoionization and reactive
scattering experiments, placement of the detector parallel to this symmetry plane ensures that
only this symmetry iscollapsed in the subsequent projection. The use of chargedparticle imaging
in particular has become wide spread withthe advent of velocity-map imaging in which
thevelocity components are focused onto a specifific point on thedetector, regardless of the initial
position in space. In thisscheme, a gridless Wiley–McLaren-type electrode arrangement
produces an electrostatic lens, which can be constructed to provide a focal plane at the detector.
VMI is anindispensable experimental tool and has been used in a widevariety of applications.
