Directly fabricated multi-scale microlens arrays on a hydrophobic flat surface by a simple ink-jet printing technique

Kim, Joo Yeon; Pfeiffer, K.; Voigt, Anja; Gruetzner, G.; Brugger, Juergen

doi:10.1039/c2jm15576a

Cited by 78 publications

(61 citation statements)

References 14 publications

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“…4 [24]. Another novel method uses a photocurable organic-inorganic hybrid polymeric resist (H-resist) printed on a hydrophobic-treated glass substrate which is then cured using a UV lamp [25]. The lens diameters and heights are controllable by changing the number of H-resist drops along with tuning the surface wetting conditions.…”

Section: Microdroplet Jettingmentioning

confidence: 99%

Fabrication, characterization, and applications of microlenses

et al. 2015

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Microlenses (MLs) and microlens arrays (MLAs) are assuming an increasingly important role in optical devices. In response to this rapid evolution in technology, emphasis is being placed on research into new manufacturing methods for these devices as well as the characterization of their performance. This paper provides an overview of the fabrication of MLs and MLAs by electrical, mechanical, chemical, and optical methods. As each processing method has distinct advantages and limitations, the most significant characteristic parameters and the measurement of these parameters are discussed for each method. These parameters are then used as indices to evaluate and improve each of the processing methods. Some examples of practical applications of MLAs, especially for micromechanical optoelectronic devices, are also given. This paper aims to summarize the present development and the state of the art in processing technology of MLs and MLAs.

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Section: Microdroplet Jettingmentioning

confidence: 99%

Fabrication, characterization, and applications of microlenses

et al. 2015

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“…When the droplets reach this substrate, they are exposed to UV light and converted to a solid state with a super smooth shape. In order to obtain a microlens with large a NA (more than 0.4), the substrate is treated by Nano texturing and fluorodecyltrichlorosilane (PFTS) or C 4 F 8 coating [39][40][41]. This method is suitable for fabricating microlens arrays in a large area rapidly at room temperature.…”

Section: Microdroplet Jetting Methodsmentioning

confidence: 99%

“…Microdroplet jetting, also known as ink jet printing, is another direct method for fabricating microlenses [38][39][40][41][42]. Figure 6 shows a schematic diagram of the working principle of this method [39].…”

Section: Microdroplet Jetting Methodsmentioning

confidence: 99%

Fabrication of Microlens Array and Its Application: A Review

Wang

Lee

et al. 2018

Chin. J. Mech. Eng.

124

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Microlens arrays are the key component in the next generation of 3D imaging system, for it exhibits some good optical properties such as extremely large field of view angles, low aberration and distortion, high temporal resolution and infinite depth of field. Although many fabrication methods or processes are proposed for manufacturing such precision component, however, those methods still need to be improved. In this review, those fabrication methods are categorized into direct and indirect method and compared in detail. Two main challenges in manufacturing microlens array are identified: how to obtain a microlens array with good uniformity in a large area and how to produce the microlens array on a curved surface? In order to effectively achieve control of the geometry of a microlens, indirect methods involving the use of 3D molds and replication technologies are suggested. Further development of ultraprecision machining technology is needed to reduce the surface fluctuation by considering the dynamics of machine tool in tool path planning. Finally, the challenges and opportunities of manufacturing microlens array in industry and academic research are discussed and several principle conclusions are drawn.

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“…To satisfy the demand of applications, various researches were carried out to fabricate precise microstructured arrays. Methods for fabricating MLAs mainly include photoresist thermal reflow , hot embossing , micro‐droplet jetting or micro‐inkjet printing , laser direct‐writing , e‐beam lithography , ultra‐precision machining , micro injection molding (μ‐IM), and micro injection‐compression molding (μ‐ICM) . Particularly, brightness field distribution of the MLAs fabricated by μ‐ICM is more uniform than those made using μ‐IM .…”

Section: Introductionmentioning

confidence: 99%

Design and application of flexible insert for microinjection compression molding polymer microlens arrays with tunable height

Xie

Huang

Chen

2017

Polymer Engineering & Sci

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A flexible insert is assembled using easily available porous plate and flexible polymer film. Then, applying microinjection compression molding technology, a fast and efficient method is proposed for successive, mass and one‐step replication of polymer microlens arrays (MLAs). Orderly MLAs with convex microlenses are successfully prepared without a given micro‐feature on the insert corresponding to that on the MLAs. Interestingly, the flexible films are deformed to arc‐like profiles that match with the shape of the microlenses with different curvatures under the action of different mold compression forces. Hence, by only changing the compression force, a series of high quality MLAs with tunable height and so geometrical‐morphology are molded by one flexible insert. The molded MLAs exhibit average heights of 61.61–86.28 µm by varying the compression force from 90 to 120 kN. The molded MLAs exhibit favorable geometrical‐morphology uniformity and optical properties. The proposed method is an accessible approach to avoid expensive equipment and complicated procedure for manufacturing the mold microfeature. POLYM. ENG. SCI., 58:213–219, 2018. © 2017 Society of Plastics Engineers

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Directly fabricated multi-scale microlens arrays on a hydrophobic flat surface by a simple ink-jet printing technique

Cited by 78 publications

References 14 publications

Fabrication, characterization, and applications of microlenses

Fabrication, characterization, and applications of microlenses

Fabrication of Microlens Array and Its Application: A Review

Design and application of flexible insert for microinjection compression molding polymer microlens arrays with tunable height

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