Planar polymer waveguides with a graded-index profile resulting from intermixing of methacrylates in closed microchannels

Missinne, Jeroen; Misseeuw, Lara Renée; Liu, Xiang; Salter, Patrick Ps.; Steenberge, Geert Van; Adesanya, Kenny; Vlierberghe, Sandra Van; Booth, Martin J.; Dubruel, Peter

doi:10.1016/j.optmat.2017.12.039

Cited by 2 publications

(1 citation statement)

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“…Such multimaterial objects are beneficial in specialized applications where material and property variations across the object geometry provides interesting functionalities. Applications include producing biomimetic components, tissue engineering, controlled drug delivery, soft robotic components, and optical applications. − Multimaterial 3D printing can significantly reduce production time and simplify the production process steps. The entire geometry (consisting of multiple sections of various materials) is printed in a single go, unlike conventional production processes where each part of a different material must be produced separately and assembled.…”

Section: Introductionmentioning

confidence: 99%

3D Printing of Multimaterial Contact Lenses

Hisham

Salih

Butt

2023

ACS Biomater. Sci. Eng.

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3D printing of multimaterial objects is an emerging field with promising applications. The layer-by-layer material addition technique used in 3D printing enables incorporation of distinct functionalized materials into the specialized devices. However, very few studies have been performed on the usage of multimaterial 3D printing for printable photonic and wearable devices. Here, we employ vat photopolymerization-based 3D printing to produce multimaterial contact lenses, offering enhanced multiband optical filtration, which can be valuable for tackling ocular conditions such as color blindness. A combination of hydroxyethyl methacrylate (HEMA) and polyethylene glycol diacrylate (PEGDA) was used as the base hydrogel for 3D printing. Atto565 and Atto488 dyes were added to the hydrogel for wavelength filtering, each dye suitable for a different type of color blindness. Multimaterial disks and contact lenses, with separate sections containing distinct dyes, were 3D-printed, and their optical properties were studied. The characteristics of multimaterial printing were analyzed, focusing on the formation of a uniform multimaterial interface. In addition, a novel technique was developed for printing multiple dyed materials in complex lateral geometrical patterns, by employing suitable variations in CAD models and the UV curing time. It was observed that the multimaterial printing process does not negatively affect the optical properties of the contact lenses. The printed multimaterial contact lenses offered a combined multi-band color blindness correction due to the two dyes used. The resulting optical spectrum was a close match to the commercially available color blindness correction glasses.

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