TY - JOUR
T1 - Accurate size measurement of needle-shaped particles using digital holography
AU - Khanam, Taslima
AU - Nurur Rahman, Mohammad
AU - Rajendran, Arvind
AU - Kariwala, Vinay
AU - Asundi, Anand K.
PY - 2011/6/15
Y1 - 2011/6/15
N2 - In this paper, a digital holography based method is proposed to accurately measure the length and orientation of the needle-shaped particles in solution. The method involves recording of the hologram and numerical reconstructions (focusing) of the hologram at several depths. An image analysis routine is then used to determine the length, location and orientation of the particles from the reconstructed images without any a priori information about the orientation of particles. The performance of the method is verified using a single fiber with known size and orientation. Subsequently, the proposed method is applied to a suspension of fibers, where the length measurements are found to be in good agreement with the true values. This proposed technique can overcome the shortcoming of existing 2D imaging tools, which can provide only the projected lengths of randomly oriented particles.
AB - In this paper, a digital holography based method is proposed to accurately measure the length and orientation of the needle-shaped particles in solution. The method involves recording of the hologram and numerical reconstructions (focusing) of the hologram at several depths. An image analysis routine is then used to determine the length, location and orientation of the particles from the reconstructed images without any a priori information about the orientation of particles. The performance of the method is verified using a single fiber with known size and orientation. Subsequently, the proposed method is applied to a suspension of fibers, where the length measurements are found to be in good agreement with the true values. This proposed technique can overcome the shortcoming of existing 2D imaging tools, which can provide only the projected lengths of randomly oriented particles.
KW - Digital holography
KW - Imaging
KW - Numerical analysis
KW - Particle
KW - Particle Characterization
KW - Particulate processes
UR - http://www.scopus.com/inward/record.url?scp=79955022466&partnerID=8YFLogxK
U2 - 10.1016/j.ces.2011.03.026
DO - 10.1016/j.ces.2011.03.026
M3 - Article
AN - SCOPUS:79955022466
SN - 0009-2509
VL - 66
SP - 2699
EP - 2706
JO - Chemical Engineering Science
JF - Chemical Engineering Science
IS - 12
ER -