Smart Luminaire


© Fraunhofer IOF


Intelligent lighting fixtures by tailor-made light distributions for lighting applications of the 21st century   


High material transparency, precision, and shape of printed optics


Differentiation and increased efficiency of the production by means of printing and laser patterning technologies for the manufacture of a car headlight demonstrated on printed refractive and diffractive optical elements

Results Smart Luminaire

Inkjet Printed, Optically Clear Transparent Objects


■ Development of technology to produce transparent objects by Inkjet printing

    ■ Material: ORMOCER® OC-D7 (printable by inkjet, low solvent content)

    ■ Reached shape accuracy:

            -  side angle 85°± 1° (1s, Min 81°, Max. 88°)

            -  length variation ≈ +190±140 μm

            -  width variation ≈ +10±100 μm

            -  P-V ≈ 20 µm (top surface area)

            -  roughness ≈ 54 nm (top surface area)


Transmission Better Than 93 %


■ Improvement of transmission through plasma etching of Inkjet printed polymer-based optical components

    ■ Transmission > 93..95% (improvement by 2..3 % due to reduced reflection)

    ■ Add-on broadband antireflection property


Integration of Reflection and Scattering Elements by Laser


■ Integration of functionality (reflection and scattering of LED light) through printing technologies in Inkjet printed polymer-based optical components

    ■ Inkjet printing and plasma sintering of Ag nanoparticle based inks

    ■ Thickness of the printed Ag layer: 0.5 – 1 µm, typical reflectivity > 90 % (93 % at 532 nm); [reflectivity of bulk-silver = 95 %]


Integration of Luminescent Sources in Printed Transparent Objects


■ Integration of electronic components (LEDs) through hybrid assembly in Inkjet printed polymer-based optical components

    ■ hybrid assembly: Aerosol-Jet technology (jetting of Ag nanoparticles based inks, sinter temperatre 125 ° C, ORMOCER® compatible) + pick and place technology

    ■ Integrated LEDs: 15..80 mcd @ 10 mA, approx. 2 V, PV < 50 mW