Single step fabrication of microlens arrays with hybrid HfO2-SiO2 sol-gel glass on conventional lens surface

Zhao, Fuhua; Xie, Yanxia; He, Shoujie; Fu, Shaojun; Lu, Zhenwu

doi:10.1364/opex.13.005846

Cited by 21 publications

(13 citation statements)

References 11 publications

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“…Removing the top patterned electrode resulted in a microlens array on the nonpatterned electrode. In addition, E-beam lithography, (31) ink-jet fabrication, (32,33) a photothermal technique using photosensitive glass, (34) optically induced volume changes in recording materials, (35)(36)(37) hot embossing, (38) laser lithographic fabrication, (39) soft lithography, (40) and a hybrid sol-gel method (41) have all been used to fabricate microlens arrays.…”

Section: Other Methodsmentioning

confidence: 99%

Biomimetic Multiaperture Imaging Systems: A Review

2015

Sensors and Materials

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The miniaturization of the vision system is an important issue in medical and military applications, such as endoscopes and robotic surveillance. Most current efforts in miniaturizing the vision system are focused on downsizing the structure of a conventional system. However, downsizing the conventional vision system has its limits. In this paper, accomplishments in fabricating miniaturized vision systems, such as apposition and superposition compound eyes, are introduced. Techniques mimicking the principles of natural vision are reviewed.

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Section: Other Methodsmentioning

confidence: 99%

Biomimetic Multiaperture Imaging Systems: A Review

2015

Sensors and Materials

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“…So, these special features are key important for surviving in Nature. However, present artificial compound eyes prepared by commercial lens‐based methods and deformed polydimethylsiloxane (PDMS) membrane suffer from round shape, low FF (30–90%), or uncontrollable profile or macrosize due to the inherent limitations of current fabrication methods, which seriously degrades their optical functions. High quality 3D artificial compound eyes (Outer imaging system) remained extremely challenging.…”

Section: Introductionmentioning

confidence: 99%

Bioinspired Fabrication of High‐Quality 3D Artificial Compound Eyes by Voxel‐Modulation Femtosecond Laser Writing for Distortion‐Free Wide‐Field‐of‐View Imaging

Wang

Niu

et al. 2014

Advanced Optical Materials

151

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The small fi eld-of-view (FOV) limits the range of vision in various detecting/ imaging devices from biological microscopes to commercial cameras and military radar. To date, imaging with FOV over 90° has been realized with fi sheye lenses, catadioptric lens, and rotating cameras. However, these devices suffer from inherent imaging distortion and require multiple bulky elements. Inspired by compound eyes found in nature, here a small-size (84 µm), distortion-free, wide-FOV imaging system is presented via an advanced 3D artifi cial eye architecture. The 3D artifi cial eye structure is accomplished by exploiting an effective optical strategy -high-speed voxel-modulation laser scanning (HVLS). The eye features a hexagonal shape, high fi ll factor (FF) (100%), large numerical aperture (NA) (0.4), ultralow surface roughness (2.5 nm) and aspherical profi le, which provides high uniformity optics (error < ±6%) and constant resolution (FWHM = 1.7 ± 0.1 µm) in all directions. Quantitative measurement shows the eye reduces imaging distortion by two/three times under 30°/45° incidence, compared with a single lens. The distortion-free FOV can be controlled from 30° to 90°.

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“…Up to now, a few methods have been used to generate such 3D structures. For example, reconfigurable microtemplating [4], laser lithographic fabrication [14], soft lithography [15,16], and hybrid sol-gel method [17]. But these techniques need expensive facilities, long processing time and complicated fabrication process.…”

Section: Introductionmentioning

confidence: 99%

A simple route to fabricate artificial compound eye structures

Qu¹,

Chen²,

Liu³

et al. 2012

Opt. Express

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A biologically inspired compound-eye structure, which composes of ~5,867 honeycomb-patterned microlenses, was fabricated on a hemispherical shell. The fabrication process was simple and low-cost, which involves a femtosecond laser-enhanced wet etching and casting process followed by a thermomechanical process to convert the film into a hemispherical surface. By optimizing the parameters of thermomechanical process to form the curvilinear surface, the experimental result shows that the microlenses are omnidirectionally aligned on the dome with lens diameters of ~85 µm and the angle between two lens of ~2°, and the individual microlenses have rudimentary focusing and imaging properties. The artificial compound-eye structure fabricated by this method has great potential applications in scale-invariant processing, robot vision, and fast motion detection.

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Single step fabrication of microlens arrays with hybrid HfO2-SiO2 sol-gel glass on conventional lens surface

Cited by 21 publications

References 11 publications

Biomimetic Multiaperture Imaging Systems: A Review

Biomimetic Multiaperture Imaging Systems: A Review

Bioinspired Fabrication of High‐Quality 3D Artificial Compound Eyes by Voxel‐Modulation Femtosecond Laser Writing for Distortion‐Free Wide‐Field‐of‐View Imaging

A simple route to fabricate artificial compound eye structures

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