Open AccessON THE LINEAR SHIFT INVARIANCE OF THE THERMAL WAVE IMAGING
Author(s) -
Shaoqun Zeng,
Haifeng Xu,
Jiaoyang Li,
Liu Xiao-De
Publication year - 1997
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.46.1338
Subject(s) - opacity , invariant (physics) , thermal , nondestructive testing , lti system theory , physics , linear system , optics , mathematical analysis , classical mechanics , quantum mechanics , thermodynamics , mathematics
In the approximation of pertubation,the thermal wave imaging was proved to be linear shift invariant under some conditions.Based on this fact ,the signal formation mechanism of such a system was interpreted when used in nondestructive evaluation of opaque materials.