Bisrat Assefa
bisrat.assefa@uef.fi
Designing freeform optics; 3D printing and characterisation of optical elements such as imaging lens, diffractive grating, slab waveguide, etc.
Publications
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Designing and 3D-printing optical components for imaging, illumination and photonics applications : a case study based on printoptical technology
Assefa, Bisrat Girma. 2019. Publications of the University of Eastern Finland. Dissertations in Forestry and Natural Sciences -
Imaging-quality 3D-printed centimeter-scale lens
Assefa, Bisrat G; Pekkarinen, Markku; Partanen, Henri; Biskop, Joris; Turunen, Jari; Saarinen, Jyrki. 2019. Optics express. 27: 12630-12637 -
Realizing freeform lenses using an optics 3D-printer for industrial based tailored irradiance distribution
Assefa, Bisrat G; Saastamoinen, Toni; Pekkarinen, Markku; Nissinen, Ville; Biskop, Joris; Kuittinen, Markku; Turunen, Jari; Saarinen, Jyrki. 2019. OSA continuum. 2: 690-702 -
3D printed plano-freeform optics for non-coherent discontinuous beam shaping
Assefa, Bisrat G; Saastamoinen, Toni; Biskop, Joris; Kuittinen, Markku; Turunen, Jari; Saarinen, Jyrki. 2018. Optical review. 25: 456-462 -
Design and characterization of 3D-printed freeform lenses for random illuminations
Assefa, Bisrat G; Saastamoinen, Toni; Pekkarinen, Markku; Kuittinen, Markku; Biskop, Joris; Turunen, Jari; Saarinen, Jyrki. Teoksessa: Kim, Jong Kyu; Krames, Michael R; Strassburg, Martin; Tu, Li-Wei(toim.) , 2018. Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XXII. s. 105541J. -
3D printed plano-freeform optics for non-coherent beam shaping
Bisrat G. Assefa, Toni Saastamoinen, Joris Biskop, Markku Kuittinen, Henri Partanen, Jani Tervo, Jari Turunen and Jyrki Saarinen1. 2017. -
Progress in 3D printing of freeform lenses for beam shaping
Bisrat G Assefa, Toni Saastamoinen, Markku Kuittinen, Jari Turunen, Jyrki Saarinen. 2017. -
Progress in 3D-printed freeform optics
Bisrat G Assefa, Toni Saastamoinen, Markku Pekkarinen, Tanmay Mondal, Pertti Silfsten, Markku Kuittinen, Jari Turunen, Jyrki Saarinen. 2017. -
3D printed freeform optics for specific target irradiance distributions
Assefa Bisrat G., Saastamoinen Toni, Hoosemans Ruud, Kuittinen Markku, Turunen Jari, Saarinen Jyrki. 2016. Photonics Finland -
Design, fabrication and characterization of freeform optics for LED source based specific irradiance distribution
Assefa Bisrat G., Saastamoinen Toni, Kuittinen Markku, Turunen Jari, Saarinen Jyrki. 2016. European Optical Society