Modem Single Point Diamond Turning (SPDT) technology offers new opportunities to address a large number of traditional problems in optical assembly and alignment. Traditional optical manufacturing rules-of-thumb have resulted from a lack of control over the Optomechanical Interface (OMI). Because of the extreme accuracy associated with SPDT, conventional alignment methods can be replaced with deterministic and cost effective methods. These SPDT techniques have been demonstrated at OCA to be compatible with athermalization strategies, and with design-to-unit-production-cost (DTUPC) considerations.
A technique for combining Newton fringe interferometry with scanning methods to characterize unique optical elements is discussed. The approach uses a converging beam as a probe and observes the Newton fringe pattern formed by the interaction between the front and rear surface reflections of the optic under test. The result is a direct measurement of the optical thickness profile of the component. The technique is well suited to the characterization of windows, domes, conformal windows, and mild corrector plates.
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