Evaluating a hybrid three-dimensional metrology system: merging data from optical and touch probe devices

Janice R. Gerde; William A. Christens-Barry

doi:10.1117/12.893969

14 September 2011 Evaluating a hybrid three-dimensional metrology system: merging data from optical and touch probe devices

Janice R. Gerde, William A. Christens-Barry

Author Affiliations +

Proceedings Volume 8133, Dimensional Optical Metrology and Inspection for Practical Applications; 81330I (2011) https://doi.org/10.1117/12.893969
Event: SPIE Optical Engineering + Applications, 2011, San Diego, California, United States

Abstract

In a project to meet requirements for CBP Laboratory analysis of footwear under the Harmonized Tariff Schedule of the United States (HTSUS), a hybrid metrology system comprising both optical and touch probe devices has been assembled. A unique requirement must be met: To identify the interface-typically obscured in samples of concern-of the "external surface area upper" (ESAU) and the sole without physically destroying the sample. The sample outer surface is determined by discrete point cloud coordinates obtained using laser scanner optical measurements. Measurements from the optically inaccessible insole region are obtained using a coordinate measuring machine (CMM). That surface similarly is defined by point cloud data. Mathematically, the individual CMM and scanner data sets are transformed into a single, common reference frame. Custom software then fits a polynomial surface to the insole data and extends it to intersect the mesh fitted to the outer surface point cloud. This line of intersection defines the required ESAU boundary, thus permitting further fractional area calculations to determine the percentage of materials present. With a draft method in place, and first-level method validation underway, we examine the transformation of the two dissimilar data sets into the single, common reference frame. We also will consider the six previously-identified potential error factors versus the method process. This paper reports our on-going work and discusses our findings to date.

Citation Download Citation

Janice R. Gerde and William A. Christens-Barry "Evaluating a hybrid three-dimensional metrology system: merging data from optical and touch probe devices", Proc. SPIE 8133, Dimensional Optical Metrology and Inspection for Practical Applications, 81330I (14 September 2011); https://doi.org/10.1117/12.893969

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
10 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Statistical analysis

Calibration

Clouds

Interfaces

Image processing

Laser scanners

Computing systems

Show All Keywords

Keywords/Phrases

Search In:

Publication Years