Tilted illumination in-line holographic velocimetry: Improvements in the axial spatial resolution

Lobera, Julia (Universidad de Zaragoza) ; Palero, Virginia (Universidad de Zaragoza) ; Roche, Eva ; Gómez Climente, Marina (Universidad de Zaragoza) ; López Torres, Ana M. (Universidad de Zaragoza) ; Andrés, Nieves (Universidad de Zaragoza) ; Arroyo, M. Pilar (Universidad de Zaragoza)

Resumen: Two are the main limitations of in-line holography: the twin image problem and the poor spatial resolution in the optical axis direction. The twin image problem can be solved with the introduction of an imaging lens and a knife-edge aperture located at its focal plane. In this work, a theoretical analysis of the axial resolution with and without aperture is provided from the perspective of the Optical Diffraction Tomography. Theoretical analysis and controlled experiments with the different recording options, demonstrate that a small tilt of the illumination beam, together with a centered rectangular aperture, is a key parameter as it improves the spatial resolution along the optical axis during the location and tracking of a particle field.

Idioma: Inglés

DOI: 10.1016/j.optlaseng.2020.106280

Año: 2020

Publicado en: Optics and Lasers in Engineering 134 (2020), 106280 [8 pp.]
ISSN: 0143-8166

Factor impacto JCR: 4.836 (2020)

Categ. JCR: OPTICS rank: 13 / 99 = 0.131 (2020) - Q1 - T1

Factor impacto SCIMAGO: 1.143 - Atomic and Molecular Physics, and Optics (Q1) - Mechanical Engineering (Q1) - Electronic, Optical and Magnetic Materials (Q1) - Electrical and Electronic Engineering (Q1)

Financiación: info:eu-repo/grantAgreement/ES/DGA-FEDER/Construyendo Europa desde Aragón
Financiación: info:eu-repo/grantAgreement/ES/DGA-FEDER/E44-17R
Financiación: info:eu-repo/grantAgreement/ES/MINECO/BES-2017-080924
Financiación: info:eu-repo/grantAgreement/ES/MINECO/DPI2016-75791-C2-2-P/1-P

Tipo y forma: Article (PostPrint)

Área (Departamento): Área Física Aplicada (Dpto. Física Aplicada)
Área (Departamento): Área Teoría Señal y Comunicac. (Dpto. Ingeniería Electrón.Com.)