Correlation of mid-spatial features to image performance in aspheric mirrors

Flemming Tinker; Kai Xin

doi:10.1117/12.2028015

30 September 2013 Correlation of mid-spatial features to image performance in aspheric mirrors

Flemming Tinker, Kai Xin

Proceedings Volume 8837, Material Technologies and Applications to Optics, Structures, Components, and Sub-Systems; 88370N (2013) https://doi.org/10.1117/12.2028015
Event: SPIE Optical Engineering + Applications, 2013, San Diego, California, United States

Abstract

Modern techniques in deterministic finishing employ devices, which provide geometrically well-defined removal functions for precision correction of fast aspheres. While stability of the removal function is essential, a commonly experienced consequence of such controlled removal is the creation of a residual trail, or signature of periodic surface “ripples” or textures that correlate to the characteristics of the removal function and tool path. The extent to which this signature exists in both amplitude and spatial frequency can have a profound impact on system imaging performance. Therefore, it is necessary to accurately characterize the spatial frequency content of surfaces and control its impact through proper specifications in order to guaranty image performance. Traditional specifications like Peak to Valley and RMS wavefront specifications cannot fully capture or predict image quality in fast aspheric optics unless perhaps they are specified over precise spatial scale lengths (or frequencies). In this paper we will explore a correlation of surface metrics and image performance using empirical data collected on a variety of fast aspheric mirrors produced by Aperture Optical Sciences Inc.

Citation Download Citation

Flemming Tinker and Kai Xin "Correlation of mid-spatial features to image performance in aspheric mirrors", Proc. SPIE 8837, Material Technologies and Applications to Optics, Structures, Components, and Sub-Systems, 88370N (30 September 2013); https://doi.org/10.1117/12.2028015

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