Results 171 to 180 of about 1,160,757 (195)

Method for auto-focusing in digital lensless holographic microscopy

Imaging and Applied Optics 2014, 2014
An auto-focusing method applicable to digital lensless holographic microscopy is presented. The proposed technique has been tested on auto-focusing experimental holograms and contrasted with some reported methods to seek for the best focus plane.
Carlos A. Trujillo, Jorge Garcia-Sucerquia   +1 more
openaire   +1 more source

Lensless single-exposure super-resolved interferometric microscopy

SPIE Proceedings, 2013
Single Exposure Super Resolved Interferometric Microscopy (SESRIM) has been recently proposed as a way to achieve one dimensional super resolved imaging in digital holographic microscopy. SESRIM uses Red-Green-Blue (RGB) multiplexing for illuminating the sample having different propagation angles for each one of the three illumination wavelengths ...
Luis Granero, Carlos Ferreira, Javier García, Vicente Micó   +3 more
openaire   +1 more source

High‐Resolution Lensless Microscopy Imaging Based on Fluorescence Intermittency

Journal of Biophotonics
ABSTRACTLensless imaging microscopy has gained extensive application with the merits of system compactness and cost efficiency; however, its spatial resolution is usually compromised compared to conventional lens‐based microscopes. To further enhance the spatial resolution, we built a lensless imaging system integrating a phase mask and a CMOS image ...
Zhiping Zeng, Xinyi Chen, Biqing Xu, Jin Qiu, Yantang Huang, Canhua Xu   +5 more
openaire   +2 more sources

Phase reconstruction in lensless digital in-line holographic microscopy

Optics and Lasers in Engineering, 2010
The phase reconstruction in a digital in-line holographic microscopy is compared using two numerical reconstruction methods. The first method uses one Fourier transform and second one uses three Fourier transforms. It is shown that the latter method gives improved object phase reconstruction as compared to the former.
Anith Nelleri, Joby Joseph, Kehar Singh
openaire   +1 more source

Lensless microscopy through multiple determined masks

Advances in Microscopic Imaging III, 2021
Ahsan Mehmood Khan, Iqra Bashir, Aqiba Hafeez, Anwar Hussain   +3 more
openaire   +1 more source

High resolution lensless microscopy based on Fresnel propagation

Optical Engineering
Digital holography allows for the recording and reconstruction of three-dimensional images using interference and diffraction principles. The propagation of light from the hologram plane to the reconstruction plane is a crucial step, often achieved through Fresnel propagation, a method that inherently transforms the reconstructed pixel pitch to provide
André F. Müller, Ralf B. Bergmann, Claas Falldorf   +2 more
openaire   +1 more source

Visualization of Particulate Matters in Air Using Lensless Microscopy

Theoretical and Natural Science
Air quality is crucial for health, yet monitoring airborne particulate matter (PM), particularly PM2.5, remains challenging due to pollution and widespread distribution. PM2.5, with diameters less than 2.5 micrometers, are known to have significant health implications.
exaly   +2 more sources

Lensless Electron Microscopy

2022
openaire   +1 more source

Sizing Calibration in Digital Lensless Holographic Microscopy via Iterative Talbot Self-Imaging

Optics and Lasers in Engineering, 2020
Carlos Buitrago-Duque, Jorge Garcia-Sucerquia   +1 more
exaly  

Lensless In-Line Holographic Microscopy With Light Source of Low Spatio-Temporal Coherence

IEEE Journal of Selected Topics in Quantum Electronics, 2021
Pranab Kumar Dutta, Sanjeev Kumar
exaly