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Proceedings Paper

Surface QC by low-cost far-field nanoscopy
Author(s): Lionel Baker
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Paper Abstract

This paper reviews work undertaken in the last few years aimed at developing low-cost technology to bridge the gap between subjective visual inspection of specular surfaces and costly objective methods. Since all measurement relies on comparison with a standard the approach adopted is that of the comparison microscope where controlled specimen illumination is used in conjunction with imaging procedures designed to achieve maximum sensitivity to the surface height variations expected. As height variations down to nanometres can be measured with a surface clearance of some millimetres the technology has been termed "Far-Field Nanoscopy". Advantage has been taken of the current wide availability of low-cost digital cameras and associated image processing software. It will be shown how the principal surface metrics of form and finish including roughness, waviness and imperfections can be addressed.

Paper Details

Date Published: 19 August 2005
PDF: 14 pages
Proc. SPIE 5878, Advanced Characterization Techniques for Optics, Semiconductors, and Nanotechnologies II, 587815 (19 August 2005); doi: 10.1117/12.611188
Show Author Affiliations
Lionel Baker, International Consultant (United Kingdom)


Published in SPIE Proceedings Vol. 5878:
Advanced Characterization Techniques for Optics, Semiconductors, and Nanotechnologies II
Angela Duparre; Bhanwar Singh; Zu-Han Gu, Editor(s)

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