研究目的
Investigating the surface relief of smooth objects using digital holography, including digital refocusing and elimination of optical aberrations.
研究成果
The developed digital holography method accurately retrieves surface relief, demonstrating practical application in materials science, such as studying hydrogenation effects on steel surfaces.
研究不足
The method is specifically designed for smooth or low-roughness surfaces, and the accuracy may vary with surface characteristics.
1:Experimental Design and Method Selection:
The method uses digital holography for surface relief study, incorporating digital refocusing and aberration elimination.
2:Sample Selection and Data Sources:
Standard roughness sample and steel 45 sheet specimen after hydrogenation.
3:List of Experimental Equipment and Materials:
He-Ne laser, micro-objective, pinhole diaphragm, beam splitter cube, imaging lens, CCD camera.
4:Experimental Procedures and Operational Workflow:
Recording digital holograms with a Michelson interferometer-based optical scheme, processing with developed software for surface topogram.
5:Data Analysis Methods:
Fourier transform for object complex field reconstruction, phase factor multiplication for numerical lens simulation, and inverse Fourier transform for surface relief calculation.
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