Prof. Dahi Ibrahim, National Institute of standards, Egypt
Phase Shifting Interferometry is a technique used in optical metrology to measure surface profiles with high precision. It involves capturing a series of interference fringe patterns produced by varying the phase of the reference beam in small increments. The phase shifts create a series of images that, when combined, allow for the extraction of accurate surface information. The Virtual Image Phase Array (VIPA) technology enhances this process by using multiple phase-shifted images to improve resolution and measurement accuracy. VIPA technology enables finer phase resolution and noise reduction, making it ideal for detailed surface topography measurements and precise optical measurements
Publication Profile
scopus
Strengths for the Award 🌟
- Extensive Educational Background 📚
- Bachelor’s and Master’s Degrees in Physics from Minia University, emphasizing solid state physics, nuclear physics, semiconductors, and optics.
- Doctorate Degree (Ph.D.) with a focus on Natural Optics and multiple-beam interferometry, demonstrating advanced expertise in optical metrology and surface micro-topography.
- Diverse Professional Experience 🌍
- Experience as a Demonstrator, Assistant Researcher, Researcher, and Quality Manager at the National Institute of Standards (NIS), showcasing a broad range of roles in the field of metrology.
- International exposure as a Post-doctoral Fellow and Visiting Scholar in South Korea, China, France, Japan, and the U.S., indicating global recognition and collaboration.
- Leadership and Administrative Roles 🏆
- Served as Head of the Engineering and Surface Metrology Department and Head of the Length Metrology and Precision Engineering Division at NIS, demonstrating leadership capabilities and responsibility in managing significant projects and teams.
- Vice President and Quality Manager roles highlight skills in quality assurance and administrative management.
- Research Contributions 📑
- Research on natural optics, interferometry, and surface micro-topography has likely contributed valuable insights and advancements to the field.
- Participation in calibrating and testing, supervising theses, and teaching courses emphasizes his commitment to both research and education.
- Membership and Committee Involvement 👥
- Member of the ScienceUp Committee at ASRT, Egypt, from April 2023, reflecting ongoing involvement in scientific and standardization activities.
Areas for Improvement 🔍
- Publications and Citations 📈
- The CV does not provide specific details about the number or impact of published papers or citations. Greater visibility in high-impact journals and conferences would enhance the researcher’s profile.
- Grants and Funding 💰
- Information on securing research grants or funding is not mentioned. Demonstrating successful grant applications or funding achievements would strengthen the case for research excellence.
- Collaborative Research and Innovations 🔬
- While there is significant international collaboration, detailing specific innovative projects or breakthrough research contributions would provide clearer evidence of impact and leadership in the field.
- Professional Development and Training 🏅
- Including more information on ongoing professional development, workshops, or training sessions could showcase continuous growth and adaptation to emerging technologies.
Education 📚
Bachelor of Science (B.Sc) Date: 1997 Principal Subjects: Physics Organization: Physics Department, Faculty of Science, Minia University Graduated Courses Date: 1988 Principal Subject: Physics Specific Studies: Solid State, Nuclear Physics, Semiconductors, Optics Organization: Physics Department, Faculty of Science, Minia University Master’s Degree (M.Sc) Date: 2001 Principal Subject: Physics Specific Studies: Change in Density of States in a Resonant Tunneling Structure Organization: Physics Department, Faculty of Science, Minia University PH.D. Courses Date: 2004 Organization: Al Azhar University, Cairo, Egypt Doctorate Degree (Ph.D) Date: 2009 Principal Subject: Natural Optics Specific Studies: Design and Characteristics of a Reflected System Multiple-Beam Interferometry and Its Applications in Surface Micro-Topography Measurement Organization: PTB, Germany (Joint with Physics Department, Al-Azhar University, Cairo, Egypt)
Professional Experience 🌟
Demonstrator Period: 1998-2002 Organization: Minia University, Faculty of Science, Physics Department, Egypt Demonstrator Period: 2003-2004 Organization: NIS, Engineering and Surface Metrology Lab., Egypt Assistant Researcher Period: 2004-2009 Organization: NIS, Engineering and Surface Metrology Lab., Egypt Researcher period: 2009-2016Organization: NIS, Engineering and Surface Metrology Lab., Egypt Sci Post-doc Fellow Period: Jan. 2010 to Oct. 2011 Organization: Division of Mechanical System Engineering, Chonbuk National University, Jeonju, South Korea Scientist Visitor Period: Oct. 2011 to Nov. 2011 Organization: State Key Lab. of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Xi’an, China Post-doc Fellow Period: Nov. 2011 to Nov. 2012 Organization: Mechanical Engineering Lab., Lille University, France Associate Member Period: Dec. 2013 to Aug. 2014 Organization: Committee Lengths in Egyptian Organization for Standards and Quality, Egypt Scientist Visitor Period: Sept. 2014 to Oct. 2014 Organization: State Key Lab of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Xi’an, China Designated Researcher Period: Oct. 2014 to Jan. 2016 Organization: Institute of Science and Technology, Tokushima University, Japan Visiting Scholar Period: Jan. 2016 to May 2016 Organization: Ophthalmology Dept., Ohio State University, Ohio, U.S.A. Quality Manager period: Jun. 2016 to Nov. 2017 Organization: NIS, Engineering and Surface Metrology Lab., Egypt Vice President Period: Nov. 2016 to Nov. 2017 Organization: Engineering and Surface Metrology Lab., NIS, Egypt Research Professor Period: Nov. 2017 to Sep. 2018 Organization: Division of Mechanical System Engineering, Chonbuk National University, Jeonju, South Korea Associate Research Professor Period: May 2016 to 30 May 2021 Organization: Engineering and Surface Metrology Lab., NIS, Egypt Professor Period: June 1, 2021 Organization: Engineering and Surface Metrology Lab., NIS, Egypt Head of Engineering and Surface Metrology Department period: August 5, 2021 to December 18, 2021 Organization: NIS, Egypt Head of Length Metrology and Precision Engineering Division Period: Dec 18, 2021 to Jul 15, 2024 Organization: NIS, Egypt Head of Primary Length Standards and Laser Technology Period: Jan 15, 2024 to Jul 15, 2024 Organization: NIS, Egypt
Research Focus
Prof. Dahi Ibrahim’s research primarily focuses on advancing techniques in optical metrology and holography. His work includes the development and calibration of step height standards using precise lateral measurements and phase-shift interferometry, incorporating sophisticated filtering methods like the Hamming window for enhanced measurement accuracy. He also explores digital holography for biomedical applications, such as diagnosing unstained biological blood cells and differentiating between normal and cancerous white blood cells. Prof. Ibrahim employs innovative methods like holographic projection techniques and digital holographic tomography for three-dimensional shape reconstruction of cells. His research extends to quantitative phase imaging, utilizing advanced algorithms like graph cuts for effective screening of both opaque and transparent objects. Additionally, he focuses on improving image quality in noisy digital holograms through the application of complex filter convolutions and estimates uncertainty budgets in interferometry, highlighting his contributions to precision measurement and diagnostic imaging.
1. Precise Lateral Measurements of Step Height Standards Using Hamming Area Model
2. Calibration of a Step Height Standard for Dimensional Metrology Using Phase-Shift Interferometry and Hamming Window: Band-Pass Filter
3. Diagnosis of Unstained Biological Blood Cells Using a Phase Hologram Displayed by a Phase-Only Spatial Light Modulator and Reconstructed by a Fourier Lens
4. Discrimination Between Normal and Cancer White Blood Cells Using Holographic Projection Technique
5. 3D Shape Reconstruction of Normal and Cancerous Red Blood Cells Using Digital Holographic Tomography: Combination of Angular Spectrum Method and Multiplicative Technique
6. Quantitative Phase Imaging Using a Combination of Flat Fielding and Windowed Fourier Filtering Demodulated by a Graph Cuts Algorithm for Screening Opaque and Transparent Objects
7. Digital Holographic Reconstruction of a Diffusely Reflecting Object Using Single-Shot Fresnel Approach
8. Diagnosis of Unstained Biological Blood Cells Using Phase Hologram
9. Estimation of an Uncertainty Budget and Performance Measurement for a Dual-Wavelength Twyman-Green Interferometer
10. Improving the Intensity-Contrast Image of a Noisy Digital Hologram by Convolution of Chebyshev Type 2 and Elliptic Filters
Conclusion 🏅
Dahi Ghareab Abdelsalam Ibrahim is a highly qualified candidate for the Best Researcher Award, given his extensive education, diverse professional experience, leadership roles, and contributions to the field of optical metrology. His international experience and significant roles at NIS demonstrate a strong commitment to research and quality management. However, enhancing the visibility of his research publications, securing grants, showcasing specific innovations, and ongoing professional development would further strengthen his candidacy. Overall, his accomplishments and leadership in the field make him a strong contender for the award.