title: Analysis of four-dimensional Mie imaging using fiber-based endoscopes.
abstract: This work reports the demonstration and analysis of four-dimensional (4D) imaging measurements in two-phase flows using fiber-based endoscopes (FBEs). Such 4D measurements resolve the droplet distribution in two-phase flows in all three spatial directions and with a temporal resolution of up to 5 kHz. Demonstration measurements were performed in a measurement volume of 85 mm × 85 mm × 85 mm discretized into 64 × 64 × 64 voxels to illustrate FBEs' potential for facilitating practical implementation of 4D tomographic measurements. Mathematical analyses were performed to quantify the fundamental advantage of FBEs to enhance the reconstruction fidelity.
authors.forename: Qingchun
authors.initials: Q
authors.lastname: Lei
authors.forename: Yue
authors.initials: Y
authors.lastname: Wu
authors.forename: Heng
authors.initials: H
authors.lastname: Xiao
authors.forename: Lin
authors.initials: L
authors.lastname: Ma
mesh_terms: D019723:Endoscopes; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005336:Fiber Optic Technology / Q000295:instrumentation*; D007089:Image Enhancement / Q000295:instrumentation* / Q000379:methods; D007090:Image Interpretation, Computer-Assisted / Q000295:instrumentation* / Q000379:methods; D021621:Imaging, Three-Dimensional / Q000295:instrumentation*; D017078:Laser-Doppler Flowmetry / Q000295:instrumentation*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity