Real-time method for fabricating 3D diffractive optical elements on curved surfaces using direct laser lithography

2021 ◽  
Author(s):  
Young-Gwang Kim ◽  
Hyug-Gyo Rhee ◽  
Young-Sik Ghim
Keyword(s):  
Real Time ◽  
Curved Surfaces ◽  
Diffractive Optical Elements ◽  
Optical Elements ◽  
Laser Lithography ◽  
Direct Laser

Method of fabricating an array of diffractive optical elements by using a direct laser lithography

2018 ◽  
Vol 101 (5-8) ◽  
pp. 1681-1685 ◽  
Author(s):  
Young-Gwang Kim ◽  
Hyug-Gyo Rhee ◽  
Young-Sik Ghim ◽  
Yun-Woo Lee
Keyword(s):  
Diffractive Optical Elements ◽  
Optical Elements ◽  
Laser Lithography ◽  
Direct Laser

Optimization of Holographic Labels for Security Applications

2019 ◽  
Vol 22 ◽  
pp. 74-83
Author(s):  
Roxana Tomescu ◽  
Catalin Parvulescu ◽  
Dana Cristea ◽  
Bogdan Bita ◽  
Brandus Comanescu ◽  
...  
Keyword(s):  
Holographic Lithography ◽  
Diffractive Optical Elements ◽  
Secret Key ◽  
Double Exposure ◽  
Optical Elements ◽  
New Approach ◽  
Security Applications ◽  
Laser Lithography ◽  
Development Step

In this paper, we propose a new approach for fabrication processes of microstructures composed of diffractive optical elements (DOE) and security elements. The holographic lithography is combined with laser lithography to obtain highly secured holographic labels for products protection. The secret key is an untraceable and hardly reproducible geometry and can be embedded in the labels or stickers to increase the level of security and diminish the possibility of products counterfeiting. In our process, the holographic structure composed of DOEs, and the key are designed separately by two authorized designers and recombined using double exposure followed by a single development step. The layout of microstructures that composes the security key are known only by the designer.

scholarly journals Design and fabrication of complicated diffractive optical elements on multiple curved surfaces

2015 ◽  
Vol 23 (26) ◽  
pp. 32917 ◽  
Author(s):  
Ran Tian ◽  
Juan Liu ◽  
Xin Li ◽  
Xugang Wang ◽  
Yongtian Wang
Keyword(s):  
Curved Surfaces ◽  
Diffractive Optical Elements ◽  
Optical Elements

Fabrication of diffractive optical elements by direct laser-writing with circular scanning

1995 ◽  
Author(s):  
Voldemar P. Koronkevich ◽  
Valery P. Kiryanov ◽  
Victor P. Korolkov ◽  
Alexander G. Poleshchuk ◽  
Vadim V. Cherkashin ◽  
...  
Keyword(s):  
Diffractive Optical Elements ◽  
Direct Laser Writing ◽  
Laser Writing ◽  
Optical Elements ◽  
Direct Laser
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