Neil Armstrong Spacesuit Conserved with Laser Scanning

Photo of Neil Armstrong Spacesuit

Neil Armstrong Spacesuit

On 16 July 1969, three men flew to the moon. Their spacesuits have since been kept at the Smithsonian National Air and Space Museum in Washington DC, but nothing lasts forever. The suit Neil Armstrong was wearing when he became the first man on the Moon hasn’t been on display for 13 years – until the museum decided to launch a Kickstarter campaign in July 2015. Dubbed ‘Reboot the Suit,’ it has 9,477 backers and has managed to raise more than $700,000 (around £539,000).

From and Article in Wired UK by Libby Plummer.

On 16 July this year, exactly 50 years after the flight, freshly restored Armsrtrong’s suit will go back on public display. First on temporary display, it’ll later become the centrepiece of the museum’s upcoming Destination Moon exhibition, slated for launch in 2022.

Structured light scanning was used to map the garment’s basic structure and colour, with the DPO team projecting light patterns across the suit and recording how they deformed over the surface. The museum then used laser arm scanning to record more detailed surface geometry, triangulating hundreds of thousands of points across the suit that were then connected to map the surface. Combining the data with CT scans enabled the team to create a 3D animation of the suit. Photogrammetry was then used to add colour details, with hundreds of photos taken from different angles tied together using specialised software.

The team faced two major technical challenges in 3D scanning the suit. First, dealing with reflective components, especially the face shield. “When the laser hits a fabric portion of the suit, it cleanly bounces back resulting in a very precise set of measurements, but when the laser hits the highly reflective gold face shield, it diffracts, causing a lot of noise in the scan,” says Vince Rossi, branch manager for 3D digitisation in the Smithsonian’s DPO. So the museum had to blend and use only the best data from four different sensors to create a clean surface that represented the face shield.

The second issue was working with the CT data. The CT scan handled the interior fabric and rubber components quite well, says Rossi, but when the X-rays hit the interior metal components, the beams scattered, “giving us very noisy data which then needed to be carefully reverse-engineered to accurately reconstruct those noisy areas.”

In autumn, the museum will start a similar conservation project on the spacesuit worn by Alan Shepard when he became the first American in space on 5 May 1961. And in future, as suits may have to be rotated in and out of the museum’s Destination Moon gallery, it’s likely that similar work will take place on the suits worn by Apollo 11 crew mates Buzz Aldrin and Michael Collins.

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This entry was posted in 3D Modeling, Consumer, cultural heritage, Data, Laser Scanning, Photogrammetry, point clouds and tagged , , , , . Bookmark the permalink.

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