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Roughness Measuring by Elastic Reference Faces

IP.com Disclosure Number: IPCOM000084498D
Original Publication Date: 1975-Nov-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Skudelny, G: AUTHOR

Abstract

To determine the roughness of slightly nonplanar faces, such as cylindrical, spherical or toroidal faces, with great radii of curvature, an elastic element having a plane reference face is pressed against the face to be measured.

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Roughness Measuring by Elastic Reference Faces

To determine the roughness of slightly nonplanar faces, such as cylindrical, spherical or toroidal faces, with great radii of curvature, an elastic element having a plane reference face is pressed against the face to be measured.

The ratio of the elasticity to the applied pressure is such that the reference face is deformed, contacting only those areas of the face to be measured which have great radii of curvature, whilst the areas exhibiting small irregularities, such as protrusions or indentations, and having small radii of curvature are not contacted. By suitable illumination in these areas Newton ring patterns are formed, indicating the location, the form, and the size of the irregularities.

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