High-quality reconstruction of coherent modulation imaging using weak cascade modulators.
Ultramicroscopy
; 214: 112990, 2020 07.
Article
en En
| MEDLINE
| ID: mdl-32413680
ABSTRACT
Coherent modulation imaging (CMI) has been shown to be an effective lensless diffraction approach to imaging general extended samples with fast algorithmic convergence and high robustness to data imperfection. Being a single-shot technique, CMI holds a high potential for imaging dynamics with ultrafast pulses like the ones from free-electron lasers. In the reported work, strong modulators have been suggested for CMI to have the optimal performance, which may be an obstacle for the wide adoption of the method. Here we show that with our improved reconstruction algorithm the requirements on the modulation depth and feature size of a modulator can be relaxed. Furthermore, we demonstrate that when cascade configuration is used, the modulators can be even weaker while providing lower image errors in reconstruction than the case of a single modulator. Detailed numerical studies in both far-field and near-field experiment geometry are given via simulation. A relaxed requirement on modulators in CMI could pave the way for its wide use in biology and materials science.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Difracción de Rayos X
/
Simulación por Computador
/
Procesamiento de Imagen Asistido por Computador
/
Aumento de la Imagen
/
Microscopía de Interferencia
Idioma:
En
Revista:
Ultramicroscopy
Año:
2020
Tipo del documento:
Article
País de afiliación:
China