Characterization of Kepler structured microlens array scanners for 2D scanning

2021 ◽  
Author(s):  
Xu Yang ◽  
Chao Geng ◽  
Xiaoyang Li ◽  
Bincheng Li ◽  
Xinyang Li
Keyword(s):  
Microlens Array

scholarly journals Morphology adjustable microlens array fabricated by single spatially modulated femtosecond pulse

Nanophotonics ◽  
2022 ◽  
Vol 0 (0) ◽  
Author(s):  
Yang Liu ◽  
Xiaowei Li ◽  
Zhipeng Wang ◽  
Bin Qin ◽  
Shipeng Zhou ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Mechanical Stability ◽  
Microlens Array ◽  
Axial Direction ◽  
Aperture Diameter ◽  
Adaptive Imaging ◽  
Biomedical Sensing ◽  
Imaging Characteristics ◽  
Single Focus

Abstract Silica microlens arrays (MLAs) with multiple numerical-apertures (NAs) have high thermal and mechanical stability, and have potential application prospects in 3D display and rapid detection. However, it is still a challenge to rapidly fabricate silica MLAs with a larger range of NAs and how to obtain multiple NAs in the same aperture diameter. Here, a wet etching assisted spatially modulated femtosecond laser pulse fabricating technology is proposed. In this technology, Gaussian laser pulse is modulated in the axial direction to create a pulse with a large aspect ratio, which is used to modify the silica to obtain a longer modification distance than traditional technology. After that, a microlens with a larger NA can be obtained by etching, and the NA variable range can be up to 0.06–0.65, and even under the same aperture, the variable NA can range up to 0.45–0.65. In addition, a single focus is radially modulated into several focus with different axial lengths to achieve a single exposure fabricating of MLA with multiple NAs. In characterization of the image under a microscope, the multi-plane imaging characteristics of the MLA are revealed. The proposed technology offers great potential toward numerous applications, including microfluidic adaptive imaging and biomedical sensing.

scholarly journals Characterization of a Commercial, Front-Illuminated Interline Transfer CCD Camera for use as a Guide Camera on a Balloon-Borne Telescope

2014 ◽  
Vol 03 (02) ◽  
pp. 1440003 ◽  
Author(s):  
Paul Clark ◽  
Richard Massey ◽  
Herrick L. Chang ◽  
Mathew Galloway ◽  
Holger Israel ◽  
...  
Keyword(s):  
High Altitude ◽  
Closed Loop ◽  
Ccd Camera ◽  
Microlens Array ◽  
Tilt Correction ◽  
Temperature And Pressure ◽  
Progressive Scan ◽  
Correction System ◽  
Better Than

We report results obtained during the characterization of a commercial front-illuminated progressive scan interline transfer CCD camera. We demonstrate that the unmodified camera operates successfully in temperature and pressure conditions (-40°C, 4 mBar) representative of a high altitude balloon mission. We further demonstrate that the centroid of a well-sampled star can be determined to better than 2% of a pixel, even though the CCD is equipped with a microlens array. This device has been selected for use in a closed-loop star-guiding and tip-tilt correction system in the BIT-STABLE balloon mission.

Fabrication and characterization of polydimethylsiloxane concave microlens array

2012 ◽  
Vol 44 (4) ◽  
pp. 1054-1059 ◽  
Author(s):  
Li Feng ◽  
Chen Sihai ◽  
Luo Huan ◽  
Zhou Yifan ◽  
Lai Jianjun ◽  
...  
Keyword(s):  
Microlens Array ◽  
Fabrication And Characterization

Replication, Characterization and Simulation of Micro Injection Molded Microlens Arrays Using Technical Amorphous Polymers

2013 ◽  
Vol 562-565 ◽  
pp. 458-464 ◽  
Author(s):  
Lei Chen ◽  
Stefan Kirchberg ◽  
Bing Yan Jiang ◽  
Lei Xie ◽  
Qing Jun Qiu ◽  
...  
Keyword(s):  
Injection Molding ◽  
Microlens Array ◽  
Amorphous Polymers ◽  
Experimental Methods ◽  
Microlens Arrays ◽  
Ultra Precision ◽  
Injection Molded ◽  
Micro Optics ◽  
Lens Radius

Novel results relating to the characterization of microlens array production by simulation and micro injection molding were examined to produce precise micro-optics from Polymethylmethacrylate (PMMA), Polycarbonate (PC) as well as Polystyrene (PS). The microlens arrays show 100 lenses in a 10×10 array with a lens radius of 271 µm and a lens depth of 45 µm. The pitches between the lenses are fixed at 800 µm. The surface of the ultra-precision diamond end-ball milled microlens array mold was polished to reduce the surface roughness of the injection molded specimen. The injection molding parameters were optimized to get precise lens geometries with high shrinkage uniformity by simulation and experimental methods. The injection molding results show precise injection molded microlens arrays and PC microlens array shows the best geometrical results compared to the microstructured insert.

Characterization of a liquid crystal microlens array using multiwalled carbon nanotube electrodes

2010 ◽  
Vol 49 (17) ◽  
pp. 3311 ◽  
Author(s):  
Xiaozhi Wang ◽  
Timothy D. Wilkinson ◽  
Mark Mann ◽  
Ken B. K. Teo ◽  
William I. Milne
Keyword(s):  
Liquid Crystal ◽  
Carbon Nanotube ◽  
Microlens Array ◽  
Multiwalled Carbon Nanotube ◽  
Multiwalled Carbon

Fabrication of microlens and microlens array using CO2 laser and characterization of formation process

2003 ◽  
Author(s):  
M. Wakaki ◽  
H. Fukumoto ◽  
H. Murotani ◽  
Y. Komachi ◽  
G. Kanai
Keyword(s):  
Co2 Laser ◽  
Formation Process ◽  
Microlens Array

Morphological Characterization of Mycobacteriophage R1

1974 ◽  
Vol 32 ◽  
pp. 254-255
Author(s):  
B. L. Soloff ◽  
T. A. Rado
Keyword(s):  
Carbon Source ◽  
Stationary Phase ◽  
Growth Phase ◽  
Minimal Medium ◽  
Morphological Characterization ◽  
Logarithmic Growth Phase ◽  
Complete Lysis ◽  
Lysogenic Culture ◽  
Logarithmic Growth

Mycobacteriophage R1 was originally isolated from a lysogenic culture of M. butyricum. The virus was propagated on a leucine-requiring derivative of M. smegmatis, 607 leu−, isolated by nitrosoguanidine mutagenesis of typestrain ATCC 607. Growth was accomplished in a minimal medium containing glycerol and glucose as carbon source and enriched by the addition of 80 μg/ ml L-leucine. Bacteria in early logarithmic growth phase were infected with virus at a multiplicity of 5, and incubated with aeration for 8 hours. The partially lysed suspension was diluted 1:10 in growth medium and incubated for a further 8 hours. This permitted stationary phase cells to re-enter logarithmic growth and resulted in complete lysis of the culture.

AEM analysis of crystallization in Ti-based amorphous alloys

1983 ◽  
Vol 41 ◽  
pp. 270-271
Author(s):  
A.R. Pelton ◽  
A.F. Marshall ◽  
Y.S. Lee
Keyword(s):  
Magnetic Properties ◽  
Amorphous Alloys ◽  
Amorphous Materials ◽  
Isothermal Annealing ◽  
Amorphous Matrix ◽  
Nucleation And Growth ◽  
Current Interest ◽  
Amorphous Films ◽  
Electrical And Magnetic Properties

Amorphous materials are of current interest due to their desirable mechanical, electrical and magnetic properties. Furthermore, crystallizing amorphous alloys provides an avenue for discerning sequential and competitive phases thus allowing access to otherwise inaccessible crystalline structures. Previous studies have shown the benefits of using AEM to determine crystal structures and compositions of partially crystallized alloys. The present paper will discuss the AEM characterization of crystallized Cu-Ti and Ni-Ti amorphous films.Cu60Ti40: The amorphous alloy Cu60Ti40, when continuously heated, forms a simple intermediate, macrocrystalline phase which then transforms to the ordered, equilibrium Cu3Ti2 phase. However, contrary to what one would expect from kinetic considerations, isothermal annealing below the isochronal crystallization temperature results in direct nucleation and growth of Cu3Ti2 from the amorphous matrix.

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