Images of the Backplane
Caption: Pictured is hardware for the James Webb Space Telescope. In the foreground is the Primary Mirror Segment Assembly (PMSA) Alignment Installation Fixture (PAIF). The PAIF is holding a mass simulator of a primary mirror segment above the black, latticed Backplane Structure Test Article (BSTA).
The PAIF will eventually be used to install the flight mirror segments on the flight backplane structure.
Credit: NASA/Chris Gunn