3D printed plano-freeform optics for non-coherent discontinuous beam shaping

Assefa, Bisrat G.; Saastamoinen, Toni; Biskop, Joris; Kuittinen, Markku; Turunen, Jari; Saarinen, Jyrki

doi:10.1007/s10043-018-0428-1

Cited by 19 publications

(7 citation statements)

References 14 publications

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“…In order to fabricate graphene enhanced THz metasurface, we employ a high-resolution layer-by-layer 3D printing technique [ 29 , 30 , 31 ] with 3D printer having three independent heads. Each head sends out drops of the liquid polymer LUX-Opticlear (Luxexcel, Alpharetta, GA, USA).…”

Section: Methodsmentioning

confidence: 99%

Terahertz Absorber with Graphene Enhanced Polymer Hemispheres Array

et al. 2021

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We propose an original technique for the fabrication of terahertz (THz) metasurfaces comprising a 3D printed regular array of polymer hemispheres covered with a thin conductive layer. We demonstrate that the deposition of a thin metal layer onto polymer hemispheres suppresses the THz reflectivity to almost zero, while the frequency range of such a suppression can be considerably broadened by enhancing the structure with graphene. Scaling up of the proposed technique makes it possible to tailor the electromagnetic responses of metasurfaces and allows for the fabrication of various components of THz photonics.

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Section: Methodsmentioning

confidence: 99%

Terahertz Absorber with Graphene Enhanced Polymer Hemispheres Array

et al. 2021

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“…The 3D‐printed lenses were fabricated by PrintOptical technology . This technique uses microdroplets of UV curable Opticlear from inkjet print heads to fabricate the optical lenses.…”

Section: Methodsmentioning

confidence: 99%

Micro Grating Deposition on Non‐Planar Surfaces by Polymer‐Assisted Transfer Printing

Balogun

Pekkarinen

Saarinen

et al. 2019

Physica Status Solidi (b)

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By spin‐coating a few hundred of nanometer thick poly(methyl methacrylate) (PMMA) film on a micron or a sub‐micron scale structure, the structure can be transferred on an arbitrary substrate. More precisely, by using a thin PMMA support layer and releasing the structure from the transient substrate into water, the PMMA with the structure can be collected on a desired substrate. Here, this technique is demonstrated to be suitable for transferring metallic binary grating and few‐layer Bragg gratings from flat substrates onto 3D‐printed convex lenses. Moreover, the thin PMMA film is sufficiently strong to support centimeter size free‐standing areas. This enables fabrication of 1.5 μm thick, free‐standing structure of a Bragg‐grating with PMMA. Thus, the presented technique provides a powerful tool for transfer printing of micron scale structures.

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“…The print head projects micro-droplets of photopolymer resin onto the substrate [Fig. 13(a)] [129]. A light source (LED or laser) is integrated into the print head and hardens the material to form the first layer.…”

Section: Light-assisted Polymer Jettingmentioning

confidence: 99%

3D printing of optical materials by processes based on photopolymerization: materials, technologies, and recent advances

Geisler

Lecompère²,

Soppera

2022

Photon. Res.

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3D printing technologies have expanded beyond the research laboratories where they were used solely for prototyping and have become widely used in several industries. The production of custom 3D objects has significant potential in optical applications. However, this necessitates extremely specific material properties, such as transparency, homogeneity, birefringence, and surface finish. Currently, the majority of optical objects are manufactured using plastics. Moreover, the 3D printing processes using polymers to produce optical objects have significant advantages, such as limited wastage, short manufacturing time, and easy customization. However, despite extensive efforts, no technology has achieved the production of objects perfectly suited for optical applications. The objective of this review is to summarize recent advances in the field of 3D printing for optics, with an emphasis on specific developments for dedicated applications, and to explore new candidate processes.

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3D printed plano-freeform optics for non-coherent discontinuous beam shaping

Cited by 19 publications

References 14 publications

Terahertz Absorber with Graphene Enhanced Polymer Hemispheres Array

Terahertz Absorber with Graphene Enhanced Polymer Hemispheres Array

Micro Grating Deposition on Non‐Planar Surfaces by Polymer‐Assisted Transfer Printing

3D printing of optical materials by processes based on photopolymerization: materials, technologies, and recent advances

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