scholarly journals Microlens Fabrication by Replica Molding of Electro-Hydrodynamic Printing Liquid Mold

Micromachines ◽  
2020 ◽  
Vol 11 (2) ◽  
pp. 161 ◽  
Author(s):  
Fang ◽  
Tao ◽  
Chen ◽  
Wang ◽  
Wu ◽  
...  
Keyword(s):  
Optical Properties ◽  
Soft Lithography ◽  
New Method ◽  
Glycerol Solution ◽  
Pdms Mold ◽  
Replica Molding ◽  
Printing Process ◽  
Optical Device ◽  
Ito Glass

In this paper, we synergistically combine electrohydrodynamic (EHD) printing and replica molding for the fabrication of microlenses. Glycerol solution microdroplets was sprayed onto the ITO glass to form liquid mold by an EHD printing process. The liquid mold is used as a master to fabricate a polydimethylsiloxane (PDMS) mold. Finally, the desired micro-optical device can be fabricated on any substrate using a PDMS soft lithography mold. We demonstrate our strategy by generating microlenses of photocurable polymers and by characterizing their optical properties. It is a new method to rapidly and cost-effectively fabricate molds with small diameters by exploiting the advantages of EHD printing, while maintaining the parallel nature of soft-lithography.

scholarly journals Optimized Soft Lithography Method for Polymer Cholesteric Liquid Crystal Flakes Fabrication

Micromachines ◽  
2019 ◽  
Vol 10 (7) ◽  
pp. 441 ◽  
Author(s):  
Guanqing Zhou ◽  
Sunqian Liu ◽  
Wei Liu ◽  
Dong Yuan ◽  
Guofu Zhou
Keyword(s):  
Optical Properties ◽  
Liquid Crystal ◽  
Polyvinyl Alcohol ◽  
Soft Lithography ◽  
Cholesteric Liquid Crystal ◽  
Release Time ◽  
Pdms Mold ◽  
Speed Up ◽  
Liquid Crystal Flakes

Polymer cholesteric liquid crystal (PCLC) flakes are gaining increasing interest for a wide variety of applications because of their unique optical properties and capabilities. Soft lithography is the most effective way to fabricate regularly shaped PCLC flakes. However, it is not easy to peel the flakes from the mold without breaking them. In order to peel the PCLC flakes from the patterned polydimethylsiloxane (PDMS) mold in a convenient way, in this paper, a method of coating a layer of polyvinyl alcohol (PVA) on a PDMS mold was proposed. The influence of the thickness of the PVA layer on the shape of the PCLC flakes and the release time from the PDMS mold were investigated. The results show that the presence of the PVA layer can speed up the release of the PCLC flakes and help maintain the shape effectively. Notably, the utilization of a PVA layer makes the PDMS mold recyclable. The influence of PCLC flake shape was also studied. This work will promote the development of switchable PCLC flake-based technologies.

Study on the optical properties of Angel Lobster eye X-ray flat micro pore optical device

2021 ◽  
Vol 483 ◽  
pp. 126656
Author(s):  
Longhui Li ◽  
Chen Zhang ◽  
Ge Jin ◽  
Weimin Yuan ◽  
Shuangnan Zhang ◽  
...  
Keyword(s):  
Optical Properties ◽  
Optical Device ◽  
X Ray ◽  
Lobster Eye

A New General Method for the Determination of Optical Properties of Amorphous Silicon Films

1990 ◽  
Vol 192 ◽  
Author(s):  
G. Amato ◽  
L. Boarino ◽  
F. Fizzotti ◽  
C. Manfredotti
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Amorphous Silicon ◽  
Optical Response ◽  
The Other ◽  
New Method ◽  
Silicon Thin Films ◽  
Physical Insight ◽  
General Method

ABSTRACTWe propose to apply a new method to model the optical response of amorphous silicon thin films. This method presents the advantage of having a good physical insight. On the other hand, although the model has been originally tested on different materials like a-Si, a-Ge and a-GaAs, we show that it is also sensitive to small differences like those that can exist between intrinsic and doped a-Si:H.

scholarly journals A New Method of Mass Measurement for Checkweighers

2010 ◽  
Vol 17 (2) ◽  
pp. 151-162 ◽  
Author(s):  
Kengo Fukuda ◽  
Koji Yoshida ◽  
Tetsuya Kinugasa ◽  
Morihito Kamon ◽  
Yoichiro Kagawa ◽  
...  
Keyword(s):  
Signal Processing ◽  
Production Process ◽  
Mass Measurement ◽  
Automatic Machine ◽  
New Method ◽  
Time Duration ◽  
Optical Device

A New Method of Mass Measurement for CheckweighersA checkweigher is an automatic machine to measure the weight of in-motion products. It is usually located around the end of the production process and ensures the weight of a product within specified limits. Any products are taken out of line if their weights are out of the specified limits. It is usually equipped with an optical device. It is used to make a trigger to set the time duration to allow a product to move completely on the weigh belt for sampling the weight. In this paper, a new method of mass measurement for checkweighers is proposed which uses just signal processing without the optical device. The effectiveness of the method is shown through experiments. Also a possibility of faster estimation of weight is shown.

Structural, electrical, and optical properties of sol-gel-processed thin films of BaTiO 3 on ITO glass

1999 ◽  
Author(s):  
Chan Hin Kam ◽  
Shi De Cheng ◽  
Yan Zhou ◽  
Kantisara Pita ◽  
X. Q. Han ◽  
...  
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Sol Gel ◽  
Electrical And Optical Properties ◽  
Ito Glass
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