caa a22 4500 465750753 CHVBK 20180323111833.0 cr unu---uuuuu 170327e19900901xx s 000 0 eng 10.1007/BF02322818 doi (NATIONALLICENCE)springer-10.1007/BF02322818 Yu Qi-Feng Department of Astronautics, Changsha Institute of Technology, Changsha, 410073, Hunan, People's Republic of China aut Constructing pure digital secondary moiré patterns [Elektronische Daten] [Qi-Feng Yu] A new method of constructing pure digital secondary moiré patterns of equal-strain fringes is proposed in this paper. By this method, a pure secondary moiré pattern, without trace of primary moiré fringes, is obtained directly from common digital moiré patterns regardless of how low or high the fringe density. The pure secondary moiré patterns eliminate the backnoise of primary fringes and give the strain value at every point over the whole strain field. This technique can significantly increase the measurement accuracy and the range of moiré techniques. Society for Experimental Mechanics, Inc., 1990 Experimental Mechanics Kluwer Academic Publishers 30/3(1990-09-01), 247-252 0014-4851 30:3<247 1990 30 11340 https://doi.org/10.1007/BF02322818 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02322818 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Yu Qi-Feng Department of Astronautics, Changsha Institute of Technology, Changsha, 410073, Hunan, People's Republic of China aut NATIONALLICENCE 773 0- Experimental Mechanics Kluwer Academic Publishers 30/3(1990-09-01), 247-252 0014-4851 30:3<247 1990 30 11340 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer