Multi-mode, multi-dimension, multi-view inspection to ensure highest quality in color coating processing

Date: 12 August 2014

The use of coated glass has risen significantly in many applications during the last decades. This is why perfect coating and highest glass quality are a must to maintain the competitive edge.  One of the new challenges for coated glass producers is to guarantee color homogeneity of the production.

Only a small variation of the coating thickness in a range of a nanometer can create an inhomogeneity visible to the human eye. This control task is especially difficult as this uniformity must be controlled on the full glass surface, in different viewing angles and on the complete production lot to avoid any claims and improve the process. The new “Color Channel” technology by ISRA is able to provide all that.



Inspection systems based on this technology are equipped with state-of-the-art special RGB line scan cameras in combination with long life, full visible spectrum LED technology and sophisticated algorithm-based software. “Color Channel” offers complete color variation monitoring in ΔE as well as the calculation of color differences in ΔC, Δa*, Δb*, etc.  The use of a full spectrum LED illumination is an essential factor for the inspection effectiveness. The signal given by the LED over the full visible spectrum is mirrored and measured on the glass surface in reflection. That way, RGB line scan cameras can give a full colored picture of the coated glass. RGB-measured values are then computed in L*a*b* color space to calculate the color variation sensation. This procedure allows for a 100 percent surface color homogeneity monitoring with a ΔE repeatability equivalent to spectrometers but now on the full surface.



Furthermore the systems enable the optical inspection of the color angle shift by using the patented multi-view technology, and in addition for a complete homogeneity control of the fully coated surface by using the so called Large Area Inspection (L.A.I.), a special supersampling method.



The advantages in short: no additional cameras or illumination setups are needed. A complete, in-process surface angle shift control is given, by using narrow and wide view angles. As well the homogeneity control is not influenced by small defects and allows even for the reliable detection of low contrast defects.



Systems for surface color monitoring allow for the automated in-process identification of the slightest color deviations. Defects are reliably identified on the complete surface, recorded and then visualized. The line operator is able to analyze defect trends and adjust production parameters accordingly. Other methods such as spectrometer measurements are not able to match the precision, efficiency and speed provided by “Color Channel” technology.





Click here to read more about coating inspection

600450 Multi-mode, multi-dimension, multi-view inspection to ensure highest quality in color coating processing glassonweb.com

See more news about:

Others also read

Vitro Architectural Glass is pleased to announce one of its newest products, Sungate ThermL™ glass, was named one of the “Top 75 Products of 2024” by Building Design + Construction (BD+C).
This alliance seeks to enhance glass façade maintenance in London with advanced nano-coating and sustainable practices.
HPDs verified for uncoated float, vacuum coated and UltraMirror® glass
Saint-Gobain Glass is excited to introduce INSIO®, the latest innovation in its product portfolio.
Join EnduroShield at Hall 10, Booth A52 to discover the latest in glass surface innovation and meet the experts driving change.
EnduroShield is excited to be part of this year’s glasstec, showcasing how its advanced protective coatings and machinery are transforming glass surfaces, making them easier to clean and more durable.

Add new comment

From industry

İçmeler Mah. D-100 Karayolu Cad. No:44A,
34947 Tuzla,/İstanbul
Turkey

52 Corniche El-Nil, AL-SHARIFAIN Tower 10th Floor,
Maadi,
Cairo Governorate
11728
Egypt

NEWS RELATED PRODUCTS

Guardian Glass Europe
Guardian Glass Europe
Vitro Architectural Glass
Diamon-Fusion International, Inc.
Guardian Glass Europe