scholarly journals Fabrication of Multifocal Microlens Array by One Step Exposure Process

Micromachines ◽  
2021 ◽  
Vol 12 (9) ◽  
pp. 1097
Author(s):  
Wei Yuan ◽  
Yajuan Cai ◽  
Cheng Xu ◽  
Hui Pang ◽  
Axiu Cao ◽  
...  

Microlenses can be widely used in integrated micro-optical systems. However, in some special applications, such as light field imaging systems, multifocal microlens arrays (MLA) are expected to improve imaging resolution. For the fabrication of multifocal MLA, the traditional fabrication method is no longer applicable. To solve this problem, a fabrication method of multifocal MLA by a one step exposure process is proposed. Through the analyses and research of photoresist AZ9260, the nonlinear relationship between exposure dose and exposure depth is established. In the design of the mask, the mask pattern is corrected according to the nonlinear relationship to obtain the final mask. The continuous surface of the multifocal MLA is fabricated by the mask moving exposure. The experimental results show that the prepared multifocal MLA has high filling factor and surface fidelity. What is more, this method is simple and efficient to use in practical applications.

RSC Advances ◽  
2015 ◽  
Vol 5 (108) ◽  
pp. 88943-88949 ◽  
Author(s):  
Chunyan Qu ◽  
Changwei Liu ◽  
Haoran Zhou ◽  
Weimiao Yu ◽  
Dezhi Wang ◽  
...  

We proposed a mechanism for the synthesis of PI/Fe3O4 composite microspheres from PAAS and iron(iii); and the composite microspheres have excellent thermal stabilities.


2016 ◽  
Vol 88 (15) ◽  
pp. 7583-7590 ◽  
Author(s):  
Chao Li ◽  
Dan Wu ◽  
Xiaolu Hu ◽  
Yang Xiang ◽  
Yongqian Shu ◽  
...  

2020 ◽  
Vol 12 (2) ◽  
pp. 641 ◽  
Author(s):  
Omid Zabihi ◽  
Mojtaba Ahmadi ◽  
Chao Liu ◽  
Roya Mahmoodi ◽  
Quanxiang Li ◽  
...  

For practical applications, both environmental and economic aspects are highly required to consider in the development of recycling of fibre reinforced polymers (FRPs) encountering their end-of-life. Here, a sustainable, low cost, and efficient approach for the recycling of the glass fibre (GF) from GF reinforced epoxy polymer (GFRP) waste is introduced, based on a microwave-assisted chemical oxidation method. It was found that in a one-step process using microwave irradiation, a mixture of hydrogen peroxide (H2O2) as a green oxidiser and tartaric acid (TA) as a natural organic acid could be used to decompose the epoxy matrix of a waste GFRP up to 90% yield. The recycled GFs with ~92.7% tensile strength, ~99.0% Young’s modulus, and ~96.2% strain-to-failure retentions were obtained when compared to virgin GFs (VGFs). This short microwave irradiation time using these green and sustainable recycling solvents makes this a significantly low energy consumption approach for the recycling of end-of-life GFRPs.


2011 ◽  
Vol 211-212 ◽  
pp. 1105-1109
Author(s):  
Xi Qiu Fan

Traditional optical lithography techniques to fabricate three-dimensional (3D) nanostructures are complicated and time consuming. Due to the capability to replicate nanostructures repeatedly in a large area with high resolution and uniformity, nanoimprint (NI) has been recognized as one of the promising approaches to fabricate 3-D nanostructures with high throughput and low cost. This paper introduces a novel 3-D nanostructure fabrication method by nanoimprint on silicon substrate. Nanoscale gratings and microlens array are taken as examples of 3-D nanostructures fabricated by nanoimprint. High fidelity demonstrates the possibility of nanoimprint to fabricate 3-D nanostructures on silicon substrate.


2020 ◽  
Vol 44 (37) ◽  
pp. 15887-15894
Author(s):  
Jingshi Wang ◽  
Zhigang Shen ◽  
Min Yi

We propose a facile one-step method to prepare a MoS2 composite anode with excellent electrochemical performance and potential for practical applications in lithium ion batteries.


2003 ◽  
Author(s):  
Jun Yao ◽  
Deepak G. Uttamchandani ◽  
Yixiao X. Zhang ◽  
Yongkang Guo ◽  
Zheng Cui
Keyword(s):  

2004 ◽  
Vol 43 (8B) ◽  
pp. 5840-5844 ◽  
Author(s):  
Kazuya Kitamura ◽  
Kuniaki Okada ◽  
Noboru Fujita ◽  
Yukiko Nagasaka ◽  
Minoru Ueda ◽  
...  

2017 ◽  
Vol 42 (12) ◽  
pp. 2358 ◽  
Author(s):  
Zhi Luo ◽  
Ji’an Duan ◽  
Chunlei Guo

2009 ◽  
Vol 15 (8) ◽  
pp. 1263-1264 ◽  
Author(s):  
Tsung-Hung Lin ◽  
Hsiharng Yang ◽  
Ching-Kong Chao ◽  
Shih-Yu Hung

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