By the end of September, NASA aerospace engineer Jason Budinoff is expected to complete the first imaging telescopes ever assembled almost exclusively from 3-D-manufactured components.
“As far as I know, we are the first to attempt to build an entire instrument with 3-D printing,” said Budinoff, who works at NASA’s Goddard Space Flight Center in Greenbelt, Maryland.
Under his multi-pronged project, funded by Goddard’s Internal Research and Development (IRAD) program, Budinoff is building a fully functional, 50-millimeter (2-inch) camera whose outer tube, baffles and optical mounts are all printed as a single structure. The instrument is appropriately sized for a CubeSat, a tiny satellite comprised of individual units each about four inches on a side. The instrument will be equipped with conventionally fabricated mirrors and glass lenses and will undergo vibration and thermal-vacuum testing next year.
Budinoff also is assembling a 350-millimeter (14-inch) dual-channel telescope whose size is more representative of a typical space telescope.
Budinoff is developing both to show that telescope and instrument structures can benefit from advances in 3-D, or additive, manufacturing. With this technique, a computer-controlled laser melts and fuses metal powder in precise locations as indicated by a 3-D computer-aided design (CAD) model. Because components are built layer by layer, it is possible to design internal features and passages that could not be cast or machined using more traditional manufacturing approaches.
The goal isn’t to fly them, at least not yet. “This is a pathfinder,” Budinoff said. “When we build telescopes for science instruments, it usually involves hundreds of pieces. These components are complex and very expensive to build. But with 3-D printing, we can reduce the overall number of parts and make them with nearly arbitrary geometries. We’re not limited by traditional mill- and lathe-fabrication operations.”
The Latest on: 3-D-printed space camera telescope
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The Latest on: 3-D-printed space camera telescope
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