title: Modified convolution method to reconstruct particle hologram with an elliptical Gaussian beam illumination.
abstract: Application of the modified convolution method to reconstruct digital inline holography of particle illuminated by an elliptical Gaussian beam is investigated. Based on the analysis on the formation of particle hologram using the Collins formula, the convolution method is modified to compensate the astigmatism by adding two scaling factors. Both simulated and experimental holograms of transparent droplets and opaque particles are used to test the algorithm, and the reconstructed images are compared with that using FRFT reconstruction. Results show that the modified convolution method can accurately reconstruct the particle image. This method has an advantage that the reconstructed images in different depth positions have the same size and resolution with the hologram. This work shows that digital inline holography has great potential in particle diagnostics in curvature containers.
authors.affiliation: State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China.
authors.forename: Xuecheng
authors.initials: X
authors.lastname: Wu
authors.forename: Yingchun
authors.initials: Y
authors.lastname: Wu
authors.forename: Jing
authors.initials: J
authors.lastname: Yang
authors.forename: Zhihua
authors.initials: Z
authors.lastname: Wang
authors.forename: Binwu
authors.initials: B
authors.lastname: Zhou
authors.forename: Gérard
authors.initials: G
authors.lastname: Gréhan
authors.forename: Kefa
authors.initials: K
authors.lastname: Cen
mesh_terms: D000465:Algorithms; D006696:Holography / Q000379:methods*; D007089:Image Enhancement / Q000379:methods*; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D008029:Lighting / Q000379:methods*; D016011:Normal Distribution; D010316:Particle Size