Sex: Male
Education
- University of the Philippines, Quezon City, Philippines, Ph.D. Physics, 2004
- Institut für Technische Optik, Universität Stuttgart, Germany, Postdoctoral fellowships, 2006
- DTU-Fotonik, Danmarks Tekniske Universitet, Denmark, Postdoctoral fellowships, 2009
- Center for Optical Res. and Educ., Univ. of Utsunomiya, Hitachi Fellow, Japan, Postdoctoral fellowships, 2014
Field of Specialization
Optics & Optoelectronics, Nondestructive Testing, Phase Retrieval, Speckle Interferometry, Holography, Coherent Metrology, Lasers, Optics, Photonics, Fringe Processing
Researches
Percival F. Almoro, Giancarlo Pedrini, Phanindra N. Gundu, Wolfgang Osten, Steen G. Hanson, (2011) Enhanced wavefront reconstruction by random phase modulation with a phase diffuser
Optics and Lasers in Engineering - OPT LASER ENG , vol. 49, no. 2, pp. 2011 Volume 49
Filipinas, J.C., Almoro, P.F., (2011) Fringe localization using focus measure
Optics Letters Volume 36
Percival F. Almoro, Giancarlo Pedrini, Phanindra N. Gundu, Wolfgang Osten, Steen G. Hanson, (2011) Enhanced wavefront reconstruction by random phase modulation with a phase diffuser
Optics and Lasers in Engineering - OPT LASER ENG Volume 49
Maallo, A.M.S., Almoro, P.F., (2011) Numerical correction of optical vortex using a wrapped phase map analysis algorithm
Optics Letters / DOI: 10.1364/OL.36.001251 Volume 36
Percival F. Almoro, Giancarlo Pedrini, Phanindra N. Gundu, Wolfgang Osten, Steen G. Hanson, (2010) Phase microscopy of technical and biological samples through random phase modulation with a diffuser
Optics Letters Volume 35, No. 7
Justine Patricia L. Carpio, (July 2014) Wavefront watermarking of technical and biological samples using digital random phase modulation and phase retrieval
Journal of Modern Optics
Esmerando Escoto, Joselito Muldera, Lean Dasallas and Elmer Estacio, (2014) Mapping of Temporal Coherence Function for Ultrafast Lasers via Statistical Fringe Analysis of Reconstructed Phase Maps
Optics Communications
Francesca Celine I. Catalan, (2013) Deterministic phase retrieval interferometry
Optics Communications
Giancarlo Pedrini, Wolfgang Osten, and C.S. Narayanamurthy, (2013) Analysis of Bessel beam propagation in free space using digital holographic microscopy
Optik - International Journal for Light and Electron Optics
Francesca Celine I. Catalan, Anne Margarette S. Maallo, (2012) Fringe analysis and enhanced characterization of sub-surface defects using fringe-shifted shearograms
Optics Communications
Laura Waller, Mostafa Agour, Claas Falldorf, Giancarlo Pedrini, Wolfgang Osten, and Steen G. Hanson, (2012) Enhanced deterministic phase retrieval using a partially developed speckle field
Optics Letters
Jae Lord Dexter C. Filipinas, (2012) Vibration detection using focus analysis of interferograms
Applied Optics
Mostafa Agour and Claas Falldorf, (2012) Investigation of smooth wave fronts using SLM-based phase retrieval and a phase diffuser
Journal of the European Optical Society Rapid Publications
Jae Lord Dexter C. Filipinas, (2011) Fringe localization using focus measure
Optics Letters
Anne Margarette S. Maallo, (2011) Numerical correction of optical vortex using a wrapped phase map analysis algorithm
Optics Letters
Giancarlo Pedrini, Phanindra N. Gundu, Wolfgang Osten, and Steen G. Hanson, (2011) Enhanced Wavefront Reconstruction by Random Phase Modulation with a Phase Diffuser
Optics and Lasers in Engineering
Giancarlo Pedrini, Fucai Zhang, Anne Margarette S. Maallo, Arund Anand, Phanindra N. Gundu, Wei Wang, Anand Asundi, Wolfgang Osten, and Steen G. Hanson, (2010) Fault-tolerant characterization of phase objects using a speckle-based phase retrieval technique
International Journal of Optomechatronics 4
Jesper Glückstad and Steen G. Hanson, (2010) Single-plane multiple speckle pattern phase retrieval using a deformable mirror
Optics Express 18
Anne Margarette S. Maallo and Steen G. Hanson, (2010) Quantization analysis of speckle intensity measurements for phase retrieval
Applied Optics 49
Giancarlo Pedrini, Phanindra N. Gundu, Wolfgang Osten, and Steen G. Hanson, (2010) Phase microscopy of technical and biological samples through random phase modulation with a diffuser
Optics Letters 35
Anne Margarette S. Maallo and Steen G. Hanson, (2009) Fast-convergent algorithm for speckle-based phase retrieval and a design for dynamic wavefront sensing
Applied Optics 48
Phanindra N. Gundu, and Steen G. Hanson, (2009) Numerical correction of aberrations via phase retrieval with speckle illumination
Optics Letters 34
Giancarlo Pedrini, Arun Anand, Wolfgang Osten, and Steen G. Hanson, (2009) Angular displacement and deformation analyses using a speckle-based wavefront sensor
Applied Optics 48
Steen G. Hanson, (2009) Object wave reconstruction by speckle illumination and phase retrieval
Journal of the European Optical Society Rapid Publications 4
Arun Anand, Vani K. Chhaniwal, Giancarlo Pedrini and Wolfgang Osten, (2009) Shape and deformation measurements of 3D objects using volume speckle field and phase retrieval
Optics Letters 34
Giancarlo Pedrini, Arun Anand, Wolfgang Osten, and Steen G. Hanson, (2008) Interferometric evaluation of angular displacements using phase retrieval
Optics Letters 33
Steen G. Hanson, (2008) Random phase plate for wavefront sensing via phase retrieval and a volume speckle field
Applied Optics 47
Steen G. Hanson, (2008) Wavefront sensing using speckles with fringe compensation
Optics Express 16
Wilson Garcia, and Caesar Saloma, (2007) Colored object recognition by digital holography and a hydrogen Raman shifter
Optics Express 15
Arun Anand, Giancarlo Pedrini and Wolfgang Osten, (2007) Wavefront sensing with random amplitude mask and phase retrieval
Optics Letters 32
Giancarlo Pedrini and Wolfgang Osten, (2007) Aperture synthesis in phase retrieval using a volumespeckle field
Optics Letters 32
Giancarlo Pedrini, and Wolfgang Osten, (2006) Complete wavefront reconstruction using sequential intensity measurements of a volume speckle field
Applied Optics 45
Marilou Cadatal, Wilson Garcia, and Caesar Saloma, (2004) Pulsed Full-Color Digital Holography with a Hydrogen Raman Shifter
Applied Optics 43
Abregana, T.J.T., & Almoro, P.F., (2016) Object localization using the statistical behavior of volume speckle fields
Optical Engineering Volume 55, No. 12
Abregana, T.J., & Almoro, P., (2015) Effects of object spatial frequency on the performance of the multiple-plane phase retrieval method
Proceedings of the 33rd Physics Congress of the Samahang Pisika ng Pilipinas, Vigan City
Abregana, T.J., Hermosa, N.P., & Almoro, P.F., (2017) Digital micromirror device as amplitude diffuser for multiple-plane phase retrieval
Proc. SPIE 10330, Modeling Aspects in Optical Metrology VI, 103300G
Abregana, T.J., & Almoro, P.F., (2016) Multiple Diffusers as Agents of Intensity Diversity for Phase Retrieval
In: Imaging and Applied Optics 2016, OSA Technical Digest (online) (Optical Society of America), paper JW4A.56
Almoro, P.F., & Abregana, T.J.T., (2015) Enhanced axial localization of rough objects using statistical fringe processing algorithm
Proc. SPIE 9660, SPECKLE 2015: VI International Conference on Speckle Metrology
Abregana, T.J., & Almoro, P.F., (2013) Phase object localization using the statistical behavior of reconstructed wavefronts
Proc. SPIE 8883, ICPS 2013: International Conference on Photonics Solutions, 88830D
Papers Presented
Complete deformation analysis of transparent samples using digital shearography and holography, Ninth International Symposium on Laser Metrology, Volume: 7155
Coherence length measurement for ultra-short laser pulses using digital holography and statistical fringe analysis, 7th International Workshop on Advanced Optical Imaging and Metrology, Springer, Nuertingen, Germany
3D shape measurement using deterministic phase retrieval and a partially developed speckle field, SPIE 8384, 83840Q, Baltimore, Maryland, USA
Investigation of smooth wave fields using SLM-based phase retrieval and a phase diffuser, 1st EOS Topical Meeting on Micro- and Nano-Optoelectronic Systems, Bremen
Reconstruction of wavefront from a photonic crystal fiber using speckle phase retrieval, Photonics 2010, Guwahati, India
Complete wavefront reconstruction at infrared wavelength using speckle phase retrieval, European Optical Society (EOS) Annual Meeting
Comparison and unification of speckle-based phase retrieval and holography with applications in phasefront alignment and recognition, The 6th International Workshop on Advanced Optical Metrology, Nürtingen, Germany, Springer
Computerized laser wavefront alignment with aberration correction using a speckle-based phase retrieval method, Technical Digest of the 3rd International Symposium on Photoelectronic Detection and Imaging
Phase error correction in wavefront curvature sensing via phase retrieval San Diego, U.S.A., SPIE 7064, 70640F
Power loss due to beam splitter cascade in the simultaneous sampling of a volume speckle field for phase retrieval, SPIE 7155, 71551J
Complete deformation analysis of transparent samples using shearography and holography, SPIE 7155, 715536
Phase retrieval using a random amplitude mask for wavefront sensing, SPIE 6617, 66170J
Wave front phase and amplitude reconstruction techniques using multi-intensity patterns, SPIE 6341, 63411C
Thickness evaluation for volume refractive objects using phase maps and statistics-based localization, 31st Samahang Pisika ng Pilipinas (SPP) Physics Congress, Cebu City
Dynamic Referencing in Pinhole Scanning Phase Retrieval, 31st SPP Physics Congress, Cebu City
Wavefront reconstruction with denoising using lateral displacements of a random phase mask, 31st SPP Physics Congress, Cebu City
Digital watermarking of retrieved phase maps, 31st SPP Physics Congress, Cebu City
Coherence evaluation for femtosecond lasers using digital holography and statistical fringe analysis, 31st SPP Physics Congress, Cebu City
Digital watermarking of reconstructed wavefronts via mutliple-plane phase retrieval technique, NIP BS Applied Physics thesis
Pinhole phase retrieval and dynamic referencing, NIP BS Applied Physics thesis
Holograms for the Investigations of 3-D objects, Compressive Stress Loading and Sub-Surface Defects, 80th National Research Council of the Philippines (NRCP) General Membership Assembly, Manila
Coherence length measurement for femtosecond lasers using digital holography and statistical fringe analysis, 30th Samahang Pisika ng Pilipinas (SPP) National Physics Congress
Watermarking of reconstructed wavefronts, 30th SPP
Interferometric evaluation using deterministic phase retrieval and speckle illumination, 30th SPP
Wavefront reconstruction using single-beam phase-shifting speckle illumination, 30th SPP
Precise reconstruction distance in digital holography using focus quantifiers, 30th SPP
Axial Localization of Phase Objects Using a Statistical Contrast Algorithmq, 30th SPP
Rough object distance measurement and fringe localization using focus measures, 29th SPP National Physics Congress, NIP-U.P. Diliman
Enhanced characterization of sub-surface defects using fringe-shifted shearograms, 29th SPP
Optical vortex tracking using standard deviation of phase maps with application in deformation analysis, 29th SPP
Interferometric vibration detection using fringe visibility quantifier, 29th SPP
Deformation analysis using spatial evolution of fringe densities, 29th SPP
Let there be diffused light: Novel methods for object wavefront reconstruction, 29th SPP
Enhanced detection of sub-surface defects using statistical variation of numerically phase-shifted shearograms, 31st PAASE Symposium, NIP-U.P. Diliman
High Resolution Technique for the Evaluation of Object Tilt and Rotation Using Amplitude Variance of Reconstructed Wavefronts, 31st PAASE
A Statistical Approach to Object Localization in Digital Holographic Microscopy in the Presence of Residual Aberration, 31st PAASE
Computer Generated Holograms of Optical Vortices, 31st PAASE NIP-U.P. Diliman
3D tracking of Optical Vortices using a Statistical Algorithm for Phase Map Analysis, 31st PAASE
Enhanced strain analysis using statistics of axial shearograms, 78th National Research Council of the Philippines (NRCP) General Membership Assembly, Manila
Enhanced object localization using axial variation of phase maps, 78th NRCP, Manila
Phase map analysis using axial behavior of reconstructed wavefronts, NIP Masteral thesis (as adviser)
Enhanced object localization using axial variation of reconstructed phase maps, Victor Angelo Gonzalez
Effects of Illumination Wavelength and Diffuser Roughness Height on Speckle Formation and Phase Retrieval, 28th Samahang Pisika ng Pilipinas (SPP) (Physical Society of the Philipines) National Physics Congress, Antipolo City
Object boundary detection using speckle-based phase retrieval, 28th SPP
Wavefront sensing using correlations of two speckle intensity measurements and a Shack Hartmann-based algorithm, 28th SPP
Shearographic inspections of glossy objects and transparent materials using speckle illumination and a diffuser, NIP Undergraduate thesis
Evaluation of a Diffusing Mask as Speckle Generator in Digital Shearography, 27th SPP, Tagaytay City, Philippines
Development of a Simplified Model for Deformation and Strain Analyses via Digital Shearography, Proc. 27th SPP
Quantization Analysis and a Design for Parallel Speckle Recording for Phase Retrieval using a Volume Speckle Field, Proc. 27th SPP
3D Object Slope Measurement Using a Geometric Model of Digital Shearography, 29th Annual PhilippineâAmerican Academy of Science and Engineering Meeting and SymposiumâAteneo de Manila University, Quezon City
Automated Strain Analysis of Transparent Samples Using Shearography and a Diffusing Mask, 29th Annual PhilippineâAmerican Academy of Science and Engineering Meeting and SymposiumâAteneo de Manila University, Quezon City
Quantization analysis and a design for parallel speckle recording for phase retrieval using a volume speckle field, NIP Undergraduate thesis
Quantization analysis and a design for parallel speckle recording for phase retrieval, 76th NRCP, Manila Hotel
Phase retrieval based on the constraints taken from parallel capture of intensity patterns of a volume speckle field, National Physics Congress, Samahang Pisika ng Pilipinas (SPP)
Strain analysis of transparent samples using digital shearography and holography, SPP
Characteristics of amplitude masks for wavefront sensing, SPP
Influence of CCD pixel size on sampling of volume speckle field for phase retrieval, SPP
Frequency analysis of phase retrieval using a volume speckle field, U.P.
Application of digital shearography in the analyses of surface deformation and photoelastic strain, SPP
Height sensitivity in 3D object shape measurement using dual-illumination phase shifting digital holography, SPP
Three-dimensional optical shape measurement using dual-illumination phase-shifting digital holography, U.P
Deformation analysis using Lensless Fourier digital holography, U.P
Phase retrieval using a volume speckle field and synthetic apertures, SPP
A technique to control chromatic dispersion of full-color digital hologram reconstructions, SPP
Full-color digital holography, U.P
Multicolor three-dimensional microscopy with digital holography, U.P
In-line semiconductor laser with optical feedback, U.P.
Pulsed full-color digital holography using hydrogen Raman shifter, U.P.
Measurement of three-dimensional deformations using phase-shifting digital holographic interferometry, Science Diliman
Pulsed multicolor digital holography using hydrogen Raman shifter, SPP
Digital holographic microscopy, SPP
Digital holograms for beginners, SPP
Phase-shifting digital holographic interferometry, U.P.
Digital holography with a 635nm semiconductor laser diode, U.P.
Surface profiling of silicon wafers using digital speckle pattern interferometry, SPP
Effects of hologram size on image quality, SPP
Holography using a 639nm laser diode and a digital photo-camera, SPP
Reconstruction of 3-D objects via phase-shifting digital holography, SPP
Measurement of 3-D deformations using phase-shifting digital holographic interferometry, SPP
Optical recognition of fingerprints, SPP
Application of optical correlation in fingerprint identification, U.P.
Optical correlation using Van der Lugt holographic filters, U.P.
Optical pattern recognition using holographic films, SPP
Holographic studies on human femur with internal fixations, SPP
Detection of sub-surface defects in vinyl tiles using double-exposure holographic interferometry, SPP
Measurement of solid object deformation using double-exposure holographic interferometry, U.P.
Evaluation of printed circuit boards using double-exposure holographic interferometry, spp
Measurement of microscopic deformations using double-exposure holographic interferometry and the Fourier transform method, Science Diliman