TY - JOUR
T1 - Random depth access full-field low-coherence interferometry applied to a small punch test
AU - Egan, Patrick
AU - Whelan, Maurice P.
AU - Lakestani, Fereydoun
AU - Connelly, Michael J.
PY - 2007/4
Y1 - 2007/4
N2 - In small punch testing, with approximate preknowledge of the sample deformation, profile measurement need only be made at selected locations in depth. To date, profilometry through full-field low-coherence interferometry has not been applied to small punch testing-conventional methods typically measure the maximum displacement as the sample is deformed, ignoring useful shape and profile information. A modification of full-field low-coherence interferometry is presented, where a digital stepper motor is combined with piezoelectric transducer scanning to achieve random depth access three-dimensional micrometer profile measurement. Offering a rapid, inexpensive, and functional machine vision system, the measurement technique is applied to a small punch test.
AB - In small punch testing, with approximate preknowledge of the sample deformation, profile measurement need only be made at selected locations in depth. To date, profilometry through full-field low-coherence interferometry has not been applied to small punch testing-conventional methods typically measure the maximum displacement as the sample is deformed, ignoring useful shape and profile information. A modification of full-field low-coherence interferometry is presented, where a digital stepper motor is combined with piezoelectric transducer scanning to achieve random depth access three-dimensional micrometer profile measurement. Offering a rapid, inexpensive, and functional machine vision system, the measurement technique is applied to a small punch test.
KW - Figure
KW - Height measurements
KW - Interferometry
KW - Small punch test
KW - Surface measurements
KW - Three-dimensional sensing
UR - http://www.scopus.com/inward/record.url?scp=33846411426&partnerID=8YFLogxK
U2 - 10.1016/j.optlaseng.2006.10.005
DO - 10.1016/j.optlaseng.2006.10.005
M3 - Article
AN - SCOPUS:33846411426
SN - 0143-8166
VL - 45
SP - 523
EP - 529
JO - Optics and Lasers in Engineering
JF - Optics and Lasers in Engineering
IS - 4
ER -