Digital particle holographic system for measurements of spray field characteristics

Abstract A digital particle holographic system for measurements of spray fields is presented. A double exposure hologram recording system with a synchronization system for time control is established, resulting in digital holograms that can be quickly recorded. To process recorded holograms, the correlation coefficient method is used for focal plane determination of particles. To remove noise and improve the quality of holograms and reconstructed images, a Wiener filter is adopted. The two-threshold and image segmentation methods are used for binary image transformation. For particle pairing, the match probability method is adopted. The proposed system is applied to a spray field, and three-dimensional velocities and sizes of spray droplets are measured. Measurement results from the digital holographic system are compared to those made by laser instruments, which prove the feasibility of the proposed in-line digital particle holographic system as a good measurement tool for spray droplets.

[1]  R. Sirohi.  Speckle Metrology , 1993, Optical Methods of Measurement.

[2]  C. Carter,et al.  Breakup of Aerated-Liquid Jets in Supersonic Crossflows , 2004 .

[3]  Anil K. Jain.  Fundamentals of Digital Image Processing , 2018, Control of Color Imaging Systems.

[4]  Yeon-Jun Choo,et al.  The characteristics of the particle position along an optical axis in particle holography , 2006 .

[5]  Corinne Fournier,et al.  Twin-image noise reduction by phase retrieval in in-line digital holography , 2005, SPIE Optics + Photonics.

[6]  Christoph Koch,et al.  Off-axis and inline electron holography: A quantitative comparison , 2010 .

[7]  C. Carter,et al.  Spray Structure in Near-Injector Region of Aerated Jet in Subsonic Crossflow , 2008 .

[8]  Sang Joon Lee,et al.  A new two-frame particle tracking algorithm using match probability , 1996 .

[9]  A. Melling,et al.  Principles and practice of laser-Doppler anemometry , 1976 .

[10]  Bo-Seon Kang,et al.  Application of the correlation coefficient method for determination of the focal plane to digital particle holography. , 2008, Applied optics.

[11]  Thomas S. Huang,et al.  Digital Holography , 2003 .

[12]  Werner Jüptner,et al.  Characterization of spatial particle distributions in a spray-forming process using digital holography , 2004 .

[13]  Francisco Palacios,et al.  Adaptive filter to improve the performance of phase-unwrapping in digital holography , 2004 .

[14]  L Yu,et al.  Iterative algorithm with a constraint condition for numerical reconstruction of a three-dimensional object from its hologram. , 2001, Journal of the Optical Society of America. A, Optics, image science, and vision.

[15]  Stefan Sinzinger,et al.  Information extraction from digital holograms for particle flow analysis , 2010 .

[16]  K. Sallam,et al.  DEMONSTRATION OF DIGITAL HOLOGRAPHIC DIAGNOSTICS FOR THE BREAKUP OF LIQUID JETS USING A COMMERCIAL-GRADE CCD SENSOR , 2009 .

[17]  C. Carter,et al.  Breakup of Aerated Liquid Jets in Subsonic Crossflow , 2008 .

[18]  Anand Asundi,et al.  Amplitude contrast image enhancement in digital holography for particles analysis , 2005, SPIE Optics + Photonics.

[19]  Cafer Ozkul,et al.  Application of wavelet transform to hologram analysis: three-dimensional location of particles , 2000 .

[20]  Peter Klages,et al.  Digital in-line holographic microscopy. , 2006, Applied optics.

[21]  A. R. Jones,et al.  Application of in-line holography to drop size measurement in dense fuel sprays. , 1978, Applied optics.

[22]  Julio Soria,et al.  Digital holography for micro-droplet diagnostics , 2007 .

[23]  C. Vest.  Speckle metrology , 1979, IEEE Journal of Quantum Electronics.

[24]  Catherine Yourassowsky,et al.  Focus plane detection criteria in digital holography microscopy by amplitude analysis. , 2006, Optics express.