We describe a glancing-incidence interferometric double-pass test, based on a pair of computer generated holograms (CGHs), for mandrels used to fabricate x-ray mirrors for space-based x-ray telescopes. The design of the test and its realization are described. The application illustrates the advantage of dual-CGH tests for the complete metrology of precise optical surfaces.
Proceedings Title: Optical Measurement Systems for Industrial Inspection
Conference Dates: June 15-18, 2009
Conference Location: Muenchen, -1
Conference Title: SPIE Europe Optical Metrology
Pub Type: Conferences
Interferometry, optical test, computer-generated hologram, x-ray telescope optics