Fabrication of continuous diffractive optical elements using a fast tool servo diamond turning process

2013 ◽  
Vol 23 (7) ◽  
pp. 075010 ◽  
Author(s):  
Jingbo Zhou ◽  
Lei Li ◽  
Neil Naples ◽  
Tao Sun ◽  
Allen Y Yi
Keyword(s):  
Diamond Turning ◽  
Diffractive Optical Elements ◽  
Fast Tool Servo ◽  
Turning Process ◽  
Optical Elements

Diffraction efficiency evaluation for diamond turning of harmonic diffractive optical elements

2020 ◽  
Vol 59 (6) ◽  
pp. 1537 ◽  
Author(s):  
Peng Zhou ◽  
Changxi Xue ◽  
Chao Yang ◽  
Chang Liu ◽  
Xingguo Liu
Keyword(s):  
Diffraction Efficiency ◽  
Diamond Turning ◽  
Efficiency Evaluation ◽  
Diffractive Optical Elements ◽  
Optical Elements

Single-point diamond turning and replication of visible and near-infrared diffractive optical elements

1997 ◽  
Vol 36 (20) ◽  
pp. 4648 ◽  
Author(s):  
C. Gary Blough ◽  
M. Rossi ◽  
Stephen K. Mack ◽  
Robert L. Michaels
Keyword(s):  
Near Infrared ◽  
Single Point ◽  
Diamond Turning ◽  
Diffractive Optical Elements ◽  
Optical Elements

scholarly journals Frequency Division Multiplexing of Terahertz Waves Realized by Diffractive Optical Elements

2021 ◽  
Vol 11 (14) ◽  
pp. 6246
Author(s):  
Paweł Komorowski ◽  
Patrycja Czerwińska ◽  
Mateusz Kaluza ◽  
Mateusz Surma ◽  
Przemysław Zagrajek ◽  
...  
Keyword(s):  
Frequency Division Multiplexing ◽  
Diffractive Optical Elements ◽  
Frequency Division ◽  
Terahertz Waves ◽  
Optical Elements ◽  
Telecommunication Systems ◽  
Wide Range ◽  
The Future ◽  
Wireless Telecommunication ◽  
Finite Distance

Recently, one of the most commonly discussed applications of terahertz radiation is wireless telecommunication. It is believed that the future 6G systems will utilize this frequency range. Although the exact technology of future telecommunication systems is not yet known, it is certain that methods for increasing their bandwidth should be investigated in advance. In this paper, we present the diffractive optical elements for the frequency division multiplexing of terahertz waves. The structures have been designed as a combination of a binary phase grating and a converging diffractive lens. The grating allows for differentiating the frequencies, while the lens assures separation and focusing at the finite distance. Designed structures have been manufactured from polyamide PA12 using the SLS 3D printer and verified experimentally. Simulations and experimental results are shown for different focal lengths. Moreover, parallel data transmission is shown for two channels of different carrier frequencies propagating in the same optical path. The designed structure allowed for detecting both signals independently without observable crosstalk. The proposed diffractive elements can work in a wide range of terahertz and sub-terahertz frequencies, depending on the design assumptions. Therefore, they can be considered as an appealing solution, regardless of the band finally used by the future telecommunication systems.

scholarly journals Nanooptical elements for visual verification

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Alexander Goncharsky ◽  
Anton Goncharsky ◽  
Dmitry Melnik ◽  
Svyatoslav Durlevich
Keyword(s):  
Electron Beam ◽  
Electron Beam Lithography ◽  
Mass Production ◽  
Optical Element ◽  
Visual Image ◽  
Zero Order ◽  
Diffractive Optical Elements ◽  
Optical Elements ◽  
Standard Equipment ◽  
Diffractive Element

AbstractThis paper focuses on the development of flat diffractive optical elements (DOEs) for protecting banknotes, documents, plastic cards, and securities against counterfeiting. A DOE is a flat diffractive element whose microrelief, when illuminated by white light, forms a visual image consisting of several symbols (digits or letters), which move across the optical element when tilted. The images formed by these elements are asymmetric with respect to the zero order. To form these images, the microrelief of a DOE must itself be asymmetric. The microrelief has a depth of ~ 0.3 microns and is shaped with an accuracy of ~ 10–15 nm using electron-beam lithography. The DOEs developed in this work are securely protected against counterfeiting and can be replicated hundreds of millions of times using standard equipment meant for the mass production of relief holograms.

Tri-axial Fast Tool Servo Using Hybrid Electromagnetic-Piezoelectric Actuation for Diamond Turning

2021 ◽  
pp. 1-1
Author(s):  
Zi-Hui Zhu ◽  
Li Chen ◽  
Yuhan Niu ◽  
Xiaonan Pu ◽  
Peng Huang ◽  
...  
Keyword(s):  
Diamond Turning ◽  
Piezoelectric Actuation ◽  
Fast Tool Servo

scholarly journals Mobile snapshot hyperspectral imaging device for skin evaluation using diffractive optical elements

2021 ◽  
Author(s):  
Christian Kern ◽  
Uwe Speck ◽  
Rainer Riesenberg ◽  
Carina Reble ◽  
Georg Khazaka ◽  
...  
Keyword(s):  
Hyperspectral Imaging ◽  
Diffractive Optical Elements ◽  
Optical Elements ◽  
Imaging Device
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