Center Of Curvature Optical Assembly (COCOA) Readies for Cryogenic Test

Center Of Curvature Optical Assembly (COCOA) at Excelis / ITT in Rochester, NY is being readied for transport to the Marshall Space Flight Center's XRCF cryogenic vacuum test facility in Huntsville, AL.

The Center Of Curvature Optical Assembly (COCOA) will allow the program to verify the optical performance of the 21.3-foot (6.5-meter) primary mirror at its 40 degrees Kelvin (-233 Celsius) operating temperature. The COCOA contains mechanical and optical instruments that allow the test team to identify, align and test the 18-segments from outside the vacuum chamber.

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Artist concept of COCOA and Webb Telescope inside Chamber A during cryogenic test.

Still IMage: COCOA and Webb Telescope inside Chamber A