Microlens array

2015 ◽  
Keyword(s):  
Microlens Array

scholarly journals Integrated Double-Sided Random Microlens Array Used for Laser Beam Homogenization

Micromachines ◽  
2021 ◽  
Vol 12 (6) ◽  
pp. 673
Author(s):  
Wei Yuan ◽  
Cheng Xu ◽  
Li Xue ◽  
Hui Pang ◽  
Axiu Cao ◽  
...  
Keyword(s):  
Laser Beam ◽  
Microlens Array ◽  
Energy Utilization ◽  
Utilization Rate ◽  
Periodic Lattice ◽  
Lattice Distribution ◽  
Speckle Field ◽  
High Laser ◽  
Alignment Problem ◽  
In Series

Double microlens arrays (MLAs) in series can be used to divide and superpose laser beam so as to achieve a homogenized spot. However, for laser beam homogenization with high coherence, the periodic lattice distribution in the homogenized spot will be generated due to the periodicity of the traditional MLA, which greatly reduces the uniformity of the homogenized spot. To solve this problem, a monolithic and highly integrated double-sided random microlens array (D-rMLA) is proposed for the purpose of achieving laser beam homogenization. The periodicity of the MLA is disturbed by the closely arranged microlens structures with random apertures. And the random speckle field is achieved to improve the uniformity of the homogenized spot by the superposition of the divided sub-beams. In addition, the double-sided exposure technique is proposed to prepare the rMLA on both sides of the same substrate with high precision alignment to form an integrated D-rMLA structure, which avoids the strict alignment problem in the installation process of traditional discrete MLAs. Then the laser beam homogenization experiments have been carried out by using the prepared D-rMLA structure. The laser beam homogenized spots of different wavelengths have been tested, including the wavelengths of 650 nm (R), 532 nm (G), and 405 nm (B). The experimental results show that the uniformity of the RGB homogenized spots is about 91%, 89%, and 90%. And the energy utilization rate is about 89%, 87%, 86%, respectively. Hence, the prepared structure has high laser beam homogenization ability and energy utilization rate, which is suitable for wide wavelength regime.

scholarly journals Research on surface quality difference of Microlens array fabricated by fast tool servo cutting

2021 ◽  
pp. 1-1
Author(s):  
Yuetian Huang ◽  
Shijie Li ◽  
Jin Zhang ◽  
Chen Yang ◽  
Yingxiu Kong ◽  
...  
Keyword(s):  
Surface Quality ◽  
Microlens Array ◽  
Fast Tool Servo ◽  
Quality Difference

Fabrication of refractive silicon microlens array with a large focal number and accurate lens profile

2019 ◽  
Vol 26 (4) ◽  
pp. 1159-1166
Author(s):  
Xiaojun Zhou ◽  
Aiguo Song ◽  
Shuai Wang ◽  
Mengjia Wang ◽  
Weixing Yu
Keyword(s):  
Microlens Array

Fabrication of bioinspired omnidirectional and gapless microlens array for wide field-of-view detections

2012 ◽  
Vol 100 (13) ◽  
pp. 133701 ◽  
Author(s):  
Hewei Liu ◽  
Feng Chen ◽  
Qing Yang ◽  
Pubo Qu ◽  
Shengguan He ◽  
...  
Keyword(s):  
Microlens Array ◽  
Field Of View ◽  
Wide Field ◽  
Wide Field Of View

Self-imaging properties of a periodic microlens array: versatile array illuminator realization

1994 ◽  
Vol 106 (1-3) ◽  
pp. 39-44 ◽  
Author(s):  
E. Bonet ◽  
P. Andrés ◽  
J.C. Barreiro ◽  
A. Pons
Keyword(s):  
Microlens Array ◽  
Imaging Properties

Design of diffractive microlens array integration with focal plane arrays

2000 ◽  
Author(s):  
Sihai Chen ◽  
Xinjian Yi ◽  
Yi Li ◽  
Miao He ◽  
Sixiang Chen ◽  
...  
Keyword(s):  
Focal Plane ◽  
Microlens Array ◽  
Focal Plane Arrays ◽  
Diffractive Microlens

scholarly journals Self‐Assembled Nanorods and Microspheres for Functional Photonics: Retroreflector Meets Microlens Array

2021 ◽  
pp. 2002258
Author(s):  
Guang Chu ◽  
Feng Chen ◽  
Bin Zhao ◽  
Xue Zhang ◽  
Eyal Zussman ◽  
...  
Keyword(s):  
Microlens Array ◽  
Self Assembled
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