Fabrication of micro-lens array on convex surface by meaning of micro-milling

2014 ◽  
Author(s):  
Peng Zhang ◽  
Yunlong Du ◽  
Bo Wang ◽  
Debin Shan
Keyword(s):  
Convex Surface ◽  
Micro Milling ◽  
Lens Array ◽  
Micro Lens Array ◽  
Micro Lens

scholarly journals Phase Retrieval with a Diffractive Micro Lens Array

2014 ◽  
Vol 8 (4) ◽  
pp. 251-259
Author(s):  
Xiyuan Liu ◽  
Karl-Heinz Brenner
Keyword(s):  
Phase Retrieval ◽  
Lens Array ◽  
Micro Lens Array ◽  
Micro Lens

The elliptical micro-lens array in the application of the LDA beam shaping

Optik ◽  
2014 ◽  
Vol 125 (24) ◽  
pp. 7149-7153 ◽  
Author(s):  
Bo Qiao ◽  
Ping Jiang ◽  
Huajun Yang ◽  
Xinwu Ma ◽  
Ming Xu
Keyword(s):  
Beam Shaping ◽  
Lens Array ◽  
Micro Lens Array ◽  
Micro Lens

An Anti-Counterfeiting Technique Based on Three-Dimensional Imaging Employing Micro-Lens Array

2015 ◽  
Vol 35 (s1) ◽  
pp. s111001
Author(s):  
郭书基 Guo Shuji ◽  
曹阿秀 Cao Axiu ◽  
史立芳 Shi Lifang ◽  
邓启凌 Deng Qiling ◽  
吴向东 Wu Xiangdong
Keyword(s):  
Three Dimensional ◽  
Three Dimensional Imaging ◽  
Lens Array ◽  
Micro Lens Array ◽  
Micro Lens

scholarly journals A Microlens Super-Surface Film with Regular Graded Circular Hole-Like Subwavelength Structures for Highly Focusing Strength

Coatings ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 776
Author(s):  
Jinshuang Wu ◽  
Leimengting Zhang ◽  
Yahong Li ◽  
Yixin Zhang ◽  
Bowei Yang ◽  
...  
Keyword(s):  
Circular Hole ◽  
Focal Length ◽  
Surface Film ◽  
Subwavelength Structures ◽  
Lens Array ◽  
Direct Laser ◽  
Short Focal Length ◽  
Micro Lens Array ◽  
Micro Lens ◽  
Sub Wavelength

Using the fact that a sub-wavelength structure exhibits the same thermal expansion coefficient as a micro-lens array, we design a micro-lens super-surface film with regular circular hole-like subwavelength structures to realize the high performances of central highly focusing strength and short focal length. In addition, based on the Fresnel—Kirchhoff diffraction theory, the influences of subwavelength structural period and height on the focusing performance of a micro-lens are analyzed. Furthermore, the finite-difference time-domain method is utilized to optimize the structural parameters. Via direct laser writing and an inductively coupled plasma process, we fabricated a square micro-lens array consisting of a 1000 × 1000 micro-lens unit with a sub-wavelength structure, and the optical focusing performance was measured in the visible light band. Finally, the experimental results indicate that the focal length is decreased to 15 μm, the focal spot central energy is increased by 7.3%, and the light transmission, enhanced via inserting sub-wavelength structures, corresponds to 3%. This proves that the designed micro-lens array with a regular-graded circular hole-like subwavelength structure can achieve central high focusing and a short focal length. This has applications in several fields of wavefront detection and light field imaging systems.

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