Results 81 to 90 of about 1,860,088 (200)
Photonics Breakthroughs 2025: Programmable Lensless Imaging With a Fresnel Zone Aperture
IEEE Photonics JournalOptical imaging has long been dominated by conventional lens-based systems, which, despite their success, remain constrained by size, weight, and cost.
Bowen Wang +5 more
doaj +1 more source
A nonlocal metasurface for optical edge detection in the far‐field
Nanophotonics, Volume 14, Issue 27, Page 5153-5161, December 2025.Abstract Recent studies on nonlocal metasurfaces have shown possibilities of optical image processing, such as edge detection, without the need for Fourier optics and have significantly reduced the form factor. However, the analog edge detection using nonlocal metasurfaces still requires the use of multiple lenses to image the edge‐enhanced results ...
Doyoon Lee, Huu Lam Phan, Minkyung Kim
wiley +1 more source
Developing an End‐to‐End 3D X‐Ray Ptychography Workflow Using Surrogate Models
Concurrency and Computation: Practice and Experience, Volume 37, Issue 25-26, 30 November 2025.ABSTRACT Recently, X‐ray ptychography has attracted significant attention as a non‐destructive imaging technique with high spatial resolution. However, its application to real‐time imaging is limited by the long execution time required for iterative phase retrieval, which reconstructs sample images from diffraction patterns. To address this issue, deep
Ryota Koda +4 more
wiley +1 more source
Towards Robust and Generalizable Lensless Imaging With Modular Learned Reconstruction
Lensless cameras disregard the conventional design that imaging should mimic the human eye. This is done by replacing the lens with a thin mask, and moving image formation to the digital post-processing.
Bezzam, Eric +2 more
core +1 more source
Diffractive lensless imaging with optimized Voronoi-Fresnel phase
, 2021 Lensless cameras are a class of imaging devices that shrink the physical dimensions to the very close vicinity of the image sensor by replacing conventional compound lenses with integrated flat optics and computational algorithms.
Wolfgang Heidrich (137430) +2 more
core +1 more source
Incoherent Digital Holography Empowered by Wavefront and Information Engineering: A Review
Advanced Photonics Research, Volume 6, Issue 10, October 2025.Advancements in incoherent digital holography (IDH) have been achieved via wavefront engineering (using spatial light modulators, diffractive optics, and metasurfaces) and information engineering (using compressive sensing and deep learning). This paper presents an overview of IDH with wavefront and information engineering, paving the way toward its ...
Teruyoshi Nobukawa
wiley +1 more source
Towards Physics-informed Cyclic Adversarial Multi-PSF Lensless Imaging [PDF]
Lensless imaging has emerged as a promising field within inverse imaging, offering compact, cost-effective solutions with the potential to revolutionize the computational camera market.
Singh, Sanjay, Banerjee, Abeer
core +1 more source
Wavefront folding interferometer for single-shot lensless imaging [PDF]
EPJ Web of ConferencesWe have developed a fast, high-resolution, and single-shot lensless imaging technique based on the wavefront folding interferometer (WFI). Considering a stationary, quasimonochromatic, and quasihomoge-ncous source of light we studied the effect of ...
Halder Atri +2 more
doaj +1 more source
Optics Communications, 1997 Abstract A theory is presented for image retrieval when a planar transparency is illuminated by spatially incoherent light that propagates in free space and is then recorded on a CCD array, but without using an imaging lens. Based on Maxwell's equations and Fourier-optical, linear-systems theory, equations are derived for digital processing of this ...
openaire +1 more source
Label-Free Phenotyping of Cell Death with an In-Incubator Lensless Quantitative Phase Microscope [PDF]
EPJ Web of ConferencesWe present a compact lensless quantitative phase microscope enabling label-free time-lapse imaging of living cells in incubators, reconstructing dry-mass dynamics and morphology to distinguish apoptosis from necrosis for drug testing, toxicity screening ...
Shevkunov Igor +2 more
doaj +1 more source