Diode-based additive manufacturing of metals using an optically-addressable light valve
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). National Ignition Facility and Photon Science Directorate and Materials Science Division, Physical & Life Sciences Directorate
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). National Ignition Facility and Photon Science Directorate
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Materials Engineering Division
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Materials Science Division, Physical & Life Sciences Directorate
We present that Selective Laser Melting (SLM) of metal powder bed layers, whereby 3D metal objects can be printed from a digital file with unprecedented design flexibility, is spurring manufacturing innovations in medical, automotive, aerospace and textile industries. Because SLM is based on raster-scanning a laser beam over each layer, the process is relatively slow compared to most traditional manufacturing methods (hours to days), thus limiting wider spread use. Here we demonstrate the use of a large area, photolithographic method for 3D metal printing, using an optically-addressable light valve (OALV) as the photomask, to print entire layers of metal powder at once. An optical sheet of multiplexed ~5 kW, 20 ms laser diode and ~1 MW, 7 ns Q-switched laser pulses are used to selectively melt each layer. Finally, the patterning of near infrared light is accomplished by imaging 470 nm light onto the transmissive OALV, which consists of polarization-selective nematic liquid crystal sandwiched between a photoconductor and transparent conductor for switching.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- AC52-07NA27344; 14-SI-004
- OSTI ID:
- 1357403
- Report Number(s):
- LLNL-JRNL-716778; OPEXFF
- Journal Information:
- Optics Express, Vol. 25, Issue 10; ISSN 1094-4087
- Publisher:
- Optical Society of America (OSA)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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