The structure keeps the telescope’s mirrors in the sun’s shadow and detect infrared light.
The structure also recently passed its critical design review and has been cleared for manufacturing.
NASA’s Goddard Space Flight Center in Greenbelt, Md. selected the company as a prime contractor to design and develop Webb’s sunshield, telescope and spacecraft.
In mid-February, the company said it would begin testing the telescope’s rocket launch and cold temperature’s capabilities.
Ball Aerospace & Technologies Corp. installed a set of auxilary mirrors for the telescope.