Webb "Pathfinder Telescope" completes second super-cold optical test Greenbelt MD (SPX) Dec 01, 2015 - Recently, the James Webb Space Telescope's "pathfinder telescope," or "Pathfinder" completed its second super-cold optical test that resulted in the first checkout of specialized optical test equipment designed to illuminate the telescope's optics through to the instrument focal planes, and the procedures used to operate this test equipment. While the actual flight elements of NASA's Webb ... more

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