Work

Measurement of arbitrary apertures by near-field diffraction digital holography and phase-visibility-modulating interferometry

Year: 2025

Type: article

Abstract: The lack of generality and accuracy of experimental methods for measuring apertures is a notable problem that has to be addressed. Most of the current approaches measure circular apertures directly using geometric tools. This paper presents a method for calculating the arbitrary shape of apertures with high resolution and accuracy using digital holography and near-field diffraction theory. It applies a back-propagation Fresnel diffraction algorithm to a diffracted optical field of an arbitrary aperture. The complex amplitude of the diffracted field is measured with high resolution and accuracy using the recent automated Phase-Visibility-Modulating Interferometry (PVMI) method. The automated PVMI is implemented in a triple-aperture common-path interferometer (TACPI) and applied for the first time to digital holography. As far as we know, it has never been used to measure arbitrary apertures. The present approach is explained and demonstrated experimentally for some symmetric and non-symmetric apertures. The measurement uncertainty is 0.01 mm for arbitrary apertures within the diameters (1.5, 8) mm

Source: Optik

DOI: 10.1016/j.ijleo.2025.172527

Authors: Miguel Angel Navarro-Ahuatl, Cruz Meneses-Fabian

Institution: Benemérita Universidad Autónoma de Puebla

Language: English

Topic: Optical measurement and interference techniques

Subfield: Computer Vision and Pattern Recognition

Field: Computer Science

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $2,650

Funders: Consejo Nacional de Ciencia y Tecnología, Benemérita Universidad Autónoma de Puebla, Vicerrectoría de Investigación y Estudios de Posgrado, Benemérita Universidad Autónoma de Puebla