Results 31 to 40 of about 4,907,875 (249)

Diffractive optical elements: Fabrication and measurement of wavelength division multiplexer

, 2022
S.158-164A new type of wavelength division demultiplexer (DEMUX), which consists of a pair of diffractive optical elements integrated on one substrate, is presented. The 3 dB resolution of the DEMUX is about 2 nm and the measured losses are about -3.5 dB
Pawlowski, E.
core   +1 more source

Replication Of Diffractive Optical Elements By Injection Molding [PDF]

, 2015
In this paper we describe the replication processes of DOE carried out at the Diffractive Optics Laboratory/UNICAMP for replicating DOE. In particular we present the results obtained in the replication by injection molding of microlens array, diffraction
Carvalho E.J., Braga E.S., Cescato L.
core   +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

Multilevel diffractive optical elements fabricated with a single amplitude-phase mask

, 2022
S.655-62To simplify the fabrication process of multilevel diffractive optical elements a new fabrication technique is presented. The fabrication process is based on a single optical lithography step and a subsequent dry-etching process.
Pawlowski, E., Engel, H.
core   +1 more source

Theoretical principle and design of high-imaging-quality refractive-diffractive optical elements by multifocal-simultaneous aberration-correction method

Results in Physics
Multifocal refractive-diffractive optical elements, which produce arbitrary light distribution, are widely used in lightweight and compact optical systems.
Bo Dong, Ying Yang, Changxi Xue
doaj   +1 more source

Comparison of far field characterisation of DOEs with a goniometric DUV-scatterometer and a CCD-based system [PDF]

Journal of the European Optical Society-Rapid Publications, 2011
We have measured far field diffraction patterns of different diffractive optical elements at an illumination wavelength of 193 nm using a new type of goniometric DUV (deep ultraviolet) scatterometer.
Wurm Matthias, Bonifer Stefanie, Bodermann Bernd, Gerhard Michael   +3 more
doaj   +1 more source

Implementation of a Large-Area Diffractive Lens Using Multiple Sub-Aperture Diffractive Lenses and Computational Reconstruction

Photonics, 2022
Direct imaging systems that create an image of an object directly on the sensor in a single step are prone to many constraints, as a perfect image is required to be recorded within this step.
Shivasubramanian Gopinath, Praveen Periysamy Angamuthu, Tauno Kahro, Andrei Bleahu, Francis Gracy Arockiaraj, Daniel Smith, Soon Hock Ng, Saulius Juodkazis, Kaupo Kukli, Aile Tamm, Vijayakumar Anand   +10 more
doaj   +1 more source

The advantages of metalenses over diffractive lenses

Nature Communications, 2020
Optical elements play a crucial role in many modern systems, from cellphones to missiles. The miniaturization trend poses a challenge to optics, since classical lenses and mirrors tend to be bulky.
Jacob Engelberg, Uriel Levy
doaj   +1 more source

Novel approach for manufacturing of continuously shaped diffractive optical elements

, 2010
Optical lithography with its 193nm technology is pushed to reach and shift its limits even further. There is strong demand on innovations in illumination part of exposure tools.
Soifer V.A., Lissotschenko V., Imgrunt W., Miklyaev Y.V., Bolshakov M.V., Pavelyev V.S., Aschke L., Kachalov D.G.   +7 more
core   +1 more source

Diffractive optical elements with square concentric rings of equal width [PDF]

, 2010
"This is the peer reviewed version of the following article: Alda, J., Sanchez-Brea, L. M., Salgado-Remacha, F. J. and Rico-García, J. M. (2010), Diffractive optical elements with square concentric rings of equal width. Microw. Opt. Technol.
Rico García, José María, Salgado Remacha, Francisco Javier, Sánchez Brea, Luis Miguel, Alda Serrano, Javier   +3 more
core   +1 more source