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Researchers 3D print micro-objectives on fiber tips, LEDs – Electronics EETimes (registration)

by • August 8, 2016 • No Comments

The laser pulses were focused in a microscope directly into liquid photoresist (resting either on a glass substrate or on the tip of an optical fiber).
After exposure, the unexposed photoresist was washed away with a solvent, leaving behind the hardened transparent polymer. Doing so they were able-bodied to create difficult optical lens stacks, which include common spherical lenses, but in addition paraboloids or aspherical lenses.
PhD student Timo Gissibl in the group of Prof. Harald Giessen at the 4th Physics Institute printed micro-objectives with a diameter and height of just 125μm, directly on the tip of optical fibres, which may enable-bodied miniaturized endoscopes.
Colored SEM-image of a miniature triplet
lens directly fabricated on an optical fiber.
Timo Gissibl in addition printed optical free form surfaces and miniature objectives directly onto CMOS image chips, creating an incredibly small in size sensor with integrated optics.
Regular arrangement of doublet lenses directly fabricated on a CMOS image sensor.
The researchers hope which via such optics, more compact and lighter cameras may be createed for drones and robots.
The micro-lenses are in addition applicable-bodied to illumination systems which include LED applications where light require to be focused in a particular way. With this additive making approach, the researchers claim which physical prototyping may take less than a day, of concept thought to the finished product.
The project was supported by Baden-Württemberg Stiftung inside the project “Spitzenforschung (cutting-edge research)”. The highly exact femtosecond 3D printing device was created by German startup Nanoscribe (founded by researchers of KIT).
Visit the University of Stuttgart at www.physik.uni-stuttgart.de

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