3D incoherent imaging using an ensemble of sparse self-rotating beams

A Bleahu, S Gopinath, T Kahro, PP Angamuthu… - Optics …, 2023 - opg.optica.org
Interferenceless coded aperture correlation holography (I-COACH) is one of the simplest
incoherent holography techniques. In I-COACH, the light from an object is modulated by a …

[HTML][HTML] Sculpting axial characteristics of incoherent imagers by hybridization methods

S Gopinath, ASJF Rajeswary, V Anand - Optics and Lasers in Engineering, 2024 - Elsevier
Axial resolving power (ARP) is one of the cornerstones of imaging systems. In conventional
imaging systems, changing ARP by changing the numerical aperture affects also lateral …

Single-Shot 3D Incoherent Imaging Using Deterministic and Random Optical Fields with Lucy–Richardson–Rosen Algorithm

AP Ignatius Xavier, FG Arockiaraj, S Gopinath… - Photonics, 2023 - mdpi.com
Coded aperture 3D imaging techniques have been rapidly evolving in recent years. The two
main directions of evolution are in aperture engineering to generate the optimal optical field …

Calcination-Enhanced Laser-Induced Damage Threshold of 3D Micro-Optics Made with Laser Multi-Photon Lithography

D Gailevicius, R Zvirblis, K Galvanauskas… - Photonics, 2023 - mdpi.com
Laser Direct Writing (LDW), also known as 3D multi-photon laser lithography of resins, is a
promising technique for fabricating complex free-form elements, including micro-optical …

[HTML][HTML] Self-wavefront interference using transverse splitting holography

A Bleahu, S Gopinath, T Kahro, SH Ng, K Kukli… - Results in Physics, 2023 - Elsevier
Manufacturing diffractive lenses with a high Numerical Aperture (NA) is a challenging task
due to limitations in lithography methods and the inverse relation between the width and the …

Maximum Likelihood Deconvolution of Beamforming Images with Signal-Dependent Speckle Fluctuations

Y Zheng, X Ping, L Li, D Wang - Remote Sensing, 2024 - mdpi.com
Ocean Acoustic Waveguide Remote Sensing (OAWRS) typically utilizes large-aperture
linear arrays combined with coherent beamforming to estimate the spatial distribution of …

Engineering axial resolution realtime and postrecording of incoherent holograms using hybridization techniques

S Gopinath, ASJF Rajeswary… - … Conference on Optical …, 2024 - spiedigitallibrary.org
In incoherent digital holography (IDH) and in any imaging technique, the lateral and axial
resolutions are intertwined and consequently changing one characteristic affects the other …

Coded Aperture-Based Self-wavefront Interference Using Transverse Splitting Holography

N Joshi, API Xavier, FG Arockiaraj… - … Conference on Next …, 2023 - ieeexplore.ieee.org
Self-wavefront interference transverse splitting holography (SWITSH) is a recently
developed holographic technique to solve a fundamental problem in the manufacturing of …

Realizing large-area diffractive lens using multiple subaperture diffractive lenses and computational reconstruction

S Gopinath, API Xavier, PP Angamuthu… - … and Modern Trends …, 2023 - spiedigitallibrary.org
Manufacturing large area diffractive lenses (DLs) is a challenging task, as in many cases,
the outermost zone width surpasses the photolithography limit and even the wavelength …

Holographic solution to a fundamental problem in diffractive optics: resolution beyond diffraction and lithography limits

A Bleahu, S Gopinath, API Xavier… - … and Modern Trends …, 2023 - spiedigitallibrary.org
Manufacturing diffractive lenses with a high numerical aperture (NA) is often a challenging
task. The challenge stems from the fundamental limit of lithography techniques and the …