Fabrication of polymeric microlens of hemispherical shape using micromolding

Moon, Su-Dong

doi:10.1117/1.1497617

Cited by 38 publications

(13 citation statements)

References 12 publications

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“…In particular, microlens arrays on top of light-emitting diodes (LEDs) could contribute to enhancing the light extraction efficiency [6,7], as the microlens arrays could increase the effective photon escape cone of the LEDs. Recently, significant progress has been achieved in fabricating the microlenses using several approaches such as hot embossing [8], laser beam written microlenses [9], deep lithography with protons [10], microcompression moulding [11], and a soft-lithography technique [12]. In addition, inkjet technology [13], roll-to-roll printing [14], and reactive ion etching [15] have also been used to manufacture micrometer-sized lenses.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of high quality and low cost microlenses on a glass substrate by direct printing technique

et al. 2014

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The fabrication of high quality and low cost microlenses on a glass substrate using a simple, rapid, and precise direct microplotting technique is shown in this paper. The fabrication method is based on the use of a microplotter system, which is significantly different from the existing inkjet, roll-to-roll printing, and reactive ion etching technology and could work with higher viscosity materials. By optimizing the parameters of voltage, dispense time, and concentration of the polymer solution, high quality microlenses with a diameter of 20 μm could be obtained. The geometrical and optical characteristics of the microlenses are analyzed by measurement of the surface profile and the imaging properties in the near-field and far-field zones as well as the diffraction pattern. We think that the fabricated microlenses could be attractive for enhancing the light extraction efficiency of light emitting diodes.

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Section: Introductionmentioning

confidence: 99%

Fabrication of high quality and low cost microlenses on a glass substrate by direct printing technique

et al. 2014

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“…To fabricate the mold insert, the mother which had the same shape as the final molded lens was needed. The micro-lens mother could be fabricated by any of the established methods [12][13][14][15] , but the reflow method was used in the present study 16 .…”

Section: Fabrication Of Micro-lens Array Using the Present Methodsmentioning

confidence: 99%

Replication of micro optical components by UV-molding process

Kim

Kang

et al. 2003

Micromachining Technology for Micro-Optics and Nano-Optics

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An experimental method is presented to maximize the replication quality of UV-molded micro-optical components. It is important to maximize the replication quality, because one can obtain the replicated micro-optical components with desired properties by accurate control of the shape. In the present study, a simple technique to avoid micro-air bubbles was first suggested. The effects of the UV-curing dose and the compression pressure on the replication quality of UVmolded structure were examined experimentally. Finally, as a practical application of the process design method, microlens arrays with diameters between 8µm and 230µm were fabricated by the present method, and the replication quality and the optical properties of the replicated micro-lens were measured and analyzed.

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“…In general, microlens and lens array can be produced using various methods such as photoresist reflow method, etching, lithography, laser ablation, microjet method, and molding (Kang and Moon 2001;Kim et al 2003;Moon et al 2002Moon et al , 2003. The molding process, which includes injection molding, compression molding, hot embossing and UV molding, is regarded as the most suitable process to achieve high repeatability and high mass production capacity.…”

Section: Fabrication Of Micro-compensatory Lensmentioning

confidence: 99%

Design of optical path of pickup for small form factor optical disk drive

et al. 2005

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We designed an optical path of pickup for the small form factor optical disk drive that is compatible with Blu-ray Disc format using 405 nm wavelength laser, 0.85 NA objective lens, and the 0.1-mm thick cover layer. The optical path consists of a high NA objective lens, a micro compensatory lens that is fabricated by micro-molding process, three reflective mirrors and a partial mirror. The optical performance of the optical path is analyzed and the expected yield ratio is calculated for 22 tolerance parameters by using Monte Carlo method. Finally, the micro compensatory lens is fabricated by micro-molding process.

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Fabrication of polymeric microlens of hemispherical shape using micromolding

Cited by 38 publications

References 12 publications

Fabrication of high quality and low cost microlenses on a glass substrate by direct printing technique

Fabrication of high quality and low cost microlenses on a glass substrate by direct printing technique

Replication of micro optical components by UV-molding process

Design of optical path of pickup for small form factor optical disk drive

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