Open AccessEffect of smoothing by spectral dispersion on the spatial spectrum of focal spot
Author(s) -
Ping Li,
Jingqin Su,
Chi Ma,
Rui Zhang,
Jing Feng
Publication year - 2009
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.58.6210
Subject(s) - smoothing , spatial frequency , optics , dispersion (optics) , physics , function (biology) , spectrum (functional analysis) , computational physics , mathematics , statistics , quantum mechanics , evolutionary biology , biology
The model of laser spectrum used in the method of smoothing by spectral dispersion SSD affecting the beam smoothing was theoretically discussed based on the analysis of spatial frequency spectrum, and the response function to the spatial frequency modulation was put forward to describe the effects. With theoretical derivation and numerical simulation, it is concluded that the spatial frequency response function by SSD has periodical property and is determined by dispersion angle and spectrum shape. More generally, spectrum shape was related with the shape of response function, the dispersion angle affects the lowest spatial frequency, and color cycle number can modify the distribution of low and high spatial frequency to change the smoothing effect. Applied to multidimensional SSD, the response function characters can give the guiding principle for optimization.