Results 31 to 40 of about 2,528 (265)

Off-Axis Polarization Volume Lens for Diffractive Waveguide

Crystals, 2023
In augmented reality diffractive waveguide technology, the light field needs to be collimated before being transmitted into the diffractive waveguide.
Lixuan Zhang, Yishi Weng, Ran Wei, Chuang Wang, Yuchen Gu, Chenyu Huang, Yuning Zhang   +6 more
doaj   +1 more source

Aberration Theoretical Principle of Broadband Multilayer Refractive–Diffractive Optical Elements by Polychromatic Integral Aberration Method

Photonics
Multilayer diffractive optical elements (MLDOEs), which have broadband imaging performance, are widely used in lightweight and compact optical systems on the surface of the refractive lenses forming refractive–diffractive lenses.
Ying Yang, Chongxing Liu, Wanting Yang, Yumin Wei, Mengyuan Liu, Bo Dong, Changxi Xue   +6 more
doaj   +1 more source

Polarization conversion when focusing cylindrically polarized vortex beams

Scientific Reports, 2016
Currently, cylindrical beams with radial or azimuthal polarization are being used successfully for the optical manipulation of micro- and nano-particles as well as in microscopy, lithography, nonlinear optics, materials processing, and telecommunication ...
Alexey P. Porfirev, Andrey V. Ustinov, Svetlana N. Khonina   +2 more
doaj   +1 more source

Programmable Diffractive Optical Elements with Applicability in Ophthalmic Optics

Optica Pura y Aplicada, 2017
espanolEste trabajo presenta resultados de la investigacion enmarcada en la tesis doctoral realizada por la doctora Lenny Alexandra Romero Perez, la cual fue enfocada en el diseno, caracterizacion y analisis de diversos elementos opticos difractivos programables (PDOEs por sus siglas en ingles) programables tales como: lentes de Fresnel, lentes ...
Millán M.S., Romero Pérez, Lenny Alexandra   +1 more
openaire   +2 more sources

Structural insights into an engineered feruloyl esterase with improved MHET degrading properties

FEBS Letters, EarlyView.
A feruloyl esterase was engineered to mimic key features of MHETase, enhancing the degradation of PET oligomers. Structural and computational analysis reveal how a point mutation stabilizes the active site and reshapes the binding cleft, expading substrate scope.
Panagiota Karampa, Konstantinos Makryniotis, Theofani‐Iosifina Sousani, Evangelos Topakas, Vangelis Daskalakis, Maria Dimarogona   +5 more
wiley   +1 more source

Diffractive Optical Elements with a Large Angle of Operation Recorded in Acrylamide Based Photopolymer on Flexible Substrates

International Journal of Polymer Science, 2014
A holographic device characterised by a large angular range of operation is under development. The aim of this study is to increase the angular working range of the diffractive lens by stacking three layers of high efficiency optical elements on top of ...
Hoda Akbari, Izabela Naydenova, Lina Persechini, Sean M. Garner, Pat Cimo, Suzanne Martin   +5 more
doaj   +1 more source

Technology of Creation Periodic Structure on Surface Crystal of Paratellurite [PDF]

Журнал нано- та електронної фізики, 2016
In this paper presents the artificial periodic structures, first obtained by method of anisotropic etching the surface of single-crystal of paratellurite. The technology of this method is in detail presented in relation to paratellurite.
S.A. Tretiakov, A.I. Kolesnikov, M.S. Vorontsov, A.I. Ivanova   +3 more
doaj   +1 more source

Structural insights and therapeutic targets in Acinetobacter baumannii capsule biosynthesis

FEBS Letters, EarlyView.
Hypervirulent KL49 A. baumannii's capsular polysaccharide contains the nonulosonic acid 8‐epi‐Leg5,7Ac2, synthesized by epimerization via ElaA, ElaB, and ElaC. Crystal structures of ElaA, ElaB, and ElaC reveal their role in CMP‐Leg5,7Ac2 synthesis and regioselective C8 epimerization.
Woo Cheol Lee, Junho Jeong, Chae Yeong Lee, Hyunjoon Cho, Man Hwan Oh, Je Chul Lee, Jee‐Young Lee, Yangmee Kim   +7 more
wiley   +1 more source

Optical twin-vortex multi-trapping by Kolakoski lenses

Scientific Reports
In this work, we design and implement a new bifocal diffractive spiral lens within an optical tweezers system. The proposed diffractive optical element coined Kolokaski Kinoform Spiral Lens (KKSL), generates twin optical vortices along the propagation ...
Arlen B. Perez-Hernández, Adrián Garmendía-Martínez, Walter D. Furlan, Juan C. Castro-Palacio, Juan A. Monsoriu, Francisco M. Muñoz-Pérez   +5 more
doaj   +1 more source

Ultrafast Airy Beam Generation with a Mode-Locked Fiber Laser

Photonics
We generate an ultrafast Airy beam with a mode-locked fiber laser. A diffractive optical element is placed inside the laser cavity and applies phase modulation on the pulses propagating in the cavity.
Silin Guo, Yajun Lou, Cai Yue, Xinhai Zhang, Fan Zhang   +4 more
doaj   +1 more source