Scattering effects of machined optical surfaces

Anita Kotha; James E. Harvey

doi:10.1117/12.218340

1 September 1995 Scattering effects of machined optical surfaces

Anita Kotha, James E. Harvey

Proceedings Volume 2541, Optical Scattering in the Optics, Semiconductor, and Computer Disk Industries; (1995) https://doi.org/10.1117/12.218340
Event: SPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation, 1995, San Diego, CA, United States

Abstract

Recent progress in the machining of optical surfaces promises to significantly reduce the time and cost of manufacturing optical elements. Specific reference is made to a new kind of machining process called deterministic microgrinding. Optical surfaces made by machining processes like single-point diamond turning, or deterministic microgrinding exhibit residual cutting tool marks that result in scattering effects which can significantly degrade optical performance. However, for some infrared applications, post-polishing may not be required and thus resulting in substantial cost savings. In this paper surface scattering theory has been implemented to model the image degradation effects of residual surface irregularities for optical surfaces exhibiting: i) azimuthal tool marks (diamond turning), ii) radial tool marks (deterministic microgrinding) and, iii) random roughness caused by conventional grinding and polishing. Intercomparison of these three processes provides new insight into the scattering behavior and fabrication tolerances for these very different manufacturing processes.

Citation Download Citation

Anita Kotha and James E. Harvey "Scattering effects of machined optical surfaces", Proc. SPIE 2541, Optical Scattering in the Optics, Semiconductor, and Computer Disk Industries, (1 September 1995); https://doi.org/10.1117/12.218340

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