B - Operations – Transporting – 23 – K
Patent
B - Operations, Transporting
23
K
B23K 26/02 (2006.01) B08B 7/00 (2006.01) B23K 26/03 (2006.01) B23K 26/40 (2006.01) B44D 3/16 (2006.01) G01N 21/01 (2006.01) G01N 21/84 (2006.01) G01J 3/51 (2006.01)
Patent
CA 2125678
2125678 9312905 PCTABS00024 Pulsed light sources (14), such as a flashlamp or laser, remove coatings (24, 26) from substrates (28) via the ablation method. A photodetector circuit, sensing reflected light (27) from the surface being ablated, provides a feedback signal (194) that indicates the color of the surface being ablated. The boundary between the coatings or substrate surfaces is distinguished by a change in color between an upper coating (24) and an undercoating (26), e.g., between a topcoat of paint and a primer coat of paint, or between a coating (26) and the substrate surface itself. The color determination thus provides a measure relative to when one coating has been removed and another coating remains. The photodetector circuit also provides feedback information relative to the quality of a stripped work surface for quality control of other purposes.
Hamm Richard Roy
Hoogerwerf John David
Macrae & Co.
Maxwell Technologies Inc.
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