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3D-Printing Method Enables Microscale Spectrometer | Research & Technology | Feb 2021 photonics.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from photonics.com Daily Mail and Mail on Sunday newspapers.
Miniature spectrometer offers novel endoscopes and cameras
10 Feb 2021
University of Stuttgart uses 3D printing to create refractive, diffractive and filtering elements.
The small stuff: miniature device
Advances in direct laser writing and 3D printing have helped the field of micro-optics achieve striking breakthroughs in tiny optical devices, driven by miniaturization philosophies dating back many years.
A project at the University of Stuttgart s Institute of Applied Optics (ITO) has now used 3D printing to manufacture a miniature spectrometer, fabricated via two-photon laser writing and inkjet deposition.
As described in Light: Advanced Manufacturing the optical system of the assembled device measures 100 x 100 x 300 microns, and features a wavelength range of 200 nanometers in the visible band from 490 to 690 nanometers.
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IMAGE: 3D-printed miniature spectrometer. a, wave-optical simulation of the spectrometer. b, microscope image of the fabricated spectrometer overlayed with the intensity distribution from a. c, array of fabricated spectrometers. view more
Credit: by Andrea Toulouse, Johannes Drozella, Simon Thiele, Harald Giessen, and Alois Herkommer
Femtosecond direct laser writing as a 3D printing technology has been one of the key building blocks for miniaturization in modern times. It has transformed the field of complex microoptics since the early 2000s. Especially medical engineering and consumer electronics as vastly growing fields benefit from these developments. It is now possible to create robust, monolithic and nearly perfectly aligned freeform optical systems on almost arbitrary substrates such as image sensors or optical fibers.