Zobrazeno 1 - 10
of 128
pro vyhledávání: '"Vijayakumar, Anand"'
Autor:
Oskar Tamm, Vipin Tiwari, Shivasubramanian Gopinath, Aravind Simon John Francis Rajeswary, Scott Arockia Singh, Joseph Rosen, Vijayakumar Anand
Publikováno v:
IEEE Access, Vol 12, Pp 76955-76962 (2024)
Optical endoscopy is a widely used minimally invasive diagnostic tool for imaging internal organs. The imaging resolution is defined by the numerical aperture of the objective lens. In this study, we proposed and demonstrated a Super-resolution Corre
Externí odkaz:
https://doaj.org/article/2cf7a946bc80406ba82878dc9e7cce85
Autor:
Shivasubramanian Gopinath, Andrei Bleahu, Tauno Kahro, Aravind Simon John Francis Rajeswary, Ravi Kumar, Kaupo Kukli, Aile Tamm, Joseph Rosen, Vijayakumar Anand
Publikováno v:
Scientific Reports, Vol 13, Iss 1, Pp 1-14 (2023)
Abstract Fresnel incoherent correlation holography (FINCH) is a well-established incoherent digital holography technique. In FINCH, light from an object point splits into two, differently modulated using two diffractive lenses with different focal di
Externí odkaz:
https://doaj.org/article/e27a178ca1864ceeb146968d4c89c8b2
Autor:
Shuji Kamegaki, Zahra Khajehsaeidimahabadi, Meguya Ryu, Nguyen Hoai An Le, Soon Hock Ng, Ričardas Buividas, Gediminas Seniutinas, Vijayakumar Anand, Saulius Juodkazis, Junko Morikawa
Publikováno v:
Micromachines, Vol 15, Iss 6, p 794 (2024)
Polarimetry is used to determine the Stokes parameters of a laser beam. Once all four S0,1,2,3 parameters are determined, the state of polarisation is established. Upon reflection of a laser beam with the defined S polarisation state, the directly me
Externí odkaz:
https://doaj.org/article/49ae06fb40464701ab2c3c74d08729f8
Autor:
Vinoth, Balasubramani, Vijayakumar, Anand, Rai, Mani Ratnam, Rosen, Joseph, Cheng, Chau-Jern, Minin, Oleg V, Minin, Igor V
We introduce a novel phase-only diffractive optical element called chiral binary square axicon (CBSA). The CBSA is designed by linearly rotating the square half-period zones of the binary square axicon with respect to one another. A quadratic phase m
Externí odkaz:
http://arxiv.org/abs/1902.04300
Publikováno v:
Scientific Reports, Vol 13, Iss 1, Pp 1-8 (2023)
Abstract Interferenceless coded aperture correlation holography (I-COACH) techniques have revolutionized the field of incoherent imaging, offering multidimensional imaging capabilities with a high temporal resolution in a simple optical configuration
Externí odkaz:
https://doaj.org/article/3d7617934fdb4213955f5fc0b5ef901d
Autor:
Andrei-ioan Bleahu, Shivasubramanian Gopinath, Tauno Kahro, Soon Hock Ng, Kaupo Kukli, Aile Tamm, Saulius Juodkazis, Joseph Rosen, Vijayakumar Anand
Publikováno v:
Results in Physics, Vol 52, Iss , Pp 106839- (2023)
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 radius of the zones. With low-resolution lithography techniques su
Externí odkaz:
https://doaj.org/article/1ec85574b5574def90a807db5a2dcd70
Autor:
Molong Han, Daniel Smith, Tauno Kahro, Dominyka Stonytė, Aarne Kasikov, Darius Gailevičius, Vipin Tiwari, Agnes Pristy Ignatius Xavier, Shivasubramanian Gopinath, Soon Hock Ng, Aravind Simon John Francis Rajeswary, Aile Tamm, Kaupo Kukli, Keith Bambery, Jitraporn Vongsvivut, Saulius Juodkazis, Vijayakumar Anand
Publikováno v:
Micromachines, Vol 15, Iss 4, p 537 (2024)
Axial resolution is one of the most important characteristics of a microscope. In all microscopes, a high axial resolution is desired in order to discriminate information efficiently along the longitudinal direction. However, when studying thick samp
Externí odkaz:
https://doaj.org/article/8dfbdf383b5946e7ae148d7aa81db740
Autor:
Joseph Rosen, Vijayakumar Anand
Publikováno v:
Photonics, Vol 11, Iss 2, p 115 (2024)
Spatial-structured longitudinal light beams are optical fields sculpted in three-dimensional (3D) space by diffractive optical elements. These beams have been recently suggested for use in improving several imaging capabilities, such as 3D imaging, e
Externí odkaz:
https://doaj.org/article/6ae7fbdecee64752b51946478eeefbcf
Autor:
Haoran Mu, Daniel Smith, Soon Hock Ng, Vijayakumar Anand, Nguyen Hoai An Le, Raghu Dharmavarapu, Zahra Khajehsaeidimahabadi, Rachael T. Richardson, Patrick Ruther, Paul R. Stoddart, Henrikas Gricius, Tomas Baravykas, Darius Gailevičius, Gediminas Seniutinas, Tomas Katkus, Saulius Juodkazis
Publikováno v:
Nanomaterials, Vol 14, Iss 3, p 287 (2024)
Emerging applications of optical technologies are driving the development of miniaturised light sources, which in turn require the fabrication of matching micro-optical elements with sub-1 mm cross-sections and high optical quality. This is particula
Externí odkaz:
https://doaj.org/article/c0ff46df40c74a188e1450f9bc73bea5
Autor:
Soon Hock Ng, Vijayakumar Anand, Molong Han, Daniel Smith, Jovan Maksimovic, Tomas Katkus, Annaleise Klein, Keith Bambery, Mark J. Tobin, Jitraporn Vongsvivut, Saulius Juodkazis
Publikováno v:
Applied Sciences, Vol 13, Iss 23, p 12948 (2023)
The Fourier transform infrared microspectroscopy (FTIRm) system of the Australian Synchrotron has a unique optical configuration with a peculiar beam profile consisting of two parallel lines. The beam is tightly focused using a 36× Schwarzschild obj
Externí odkaz:
https://doaj.org/article/3b14fa740aed40c6895e3841e0784fc4