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Optical Engineering

Non-orthogonal depth from focus for on-the-fly, three-dimensional inspection
Author(s): Evan Ribnick
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Paper Abstract

This paper describes a new technique that was developed for performing three-dimensional (3-D) reconstruction on-the-fly for inspection applications. It is based on the same principles as the traditional depth from focus approach but is able to estimate the three-dimensional structure of a surface as it is undergoing a continuous linear lateral translation, similar to the situation on many types of modern production lines. This has important applications in the area of automated inspection and quality control, since the ability to inspect materials in real-time as they are being manufactured in a continuous process is valuable in a broad range of circumstances. We assume that the relative motion of the surface is known, which is realistic in these types of environments. We demonstrate the technical feasibility of our approach, including its ability to acquire 3-D shape on several different types of structured surfaces.

Paper Details

Date Published: 16 August 2012
PDF: 10 pages
Opt. Eng. 51(8) 083608 doi: 10.1117/1.OE.51.8.083608
Published in: Optical Engineering Volume 51, Issue 8
Show Author Affiliations
Evan Ribnick, 3M Co. (United States)

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