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

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

IfG Glastechnik at glasstec 2018 Stand D21 Hall 15
IfG Glastechnik GmbH, designs and manufactures machinery to apply separating powder and ultrasonic wet spray glass coating systems to all types of sheet glass.
Enjoy Even More of The Seaside with Balconette
Properties by the sea are a delight, especially if you have a balcony or protected decking from which to enjoy the views and fresh sea air.
Glass Performance versus Aesthetics
Guardian Glass is exhibiting at glasstec - HALL 10 | STAND A24 (23-26 October 2018 - Düsseldorf, Germany).
Meet Materion at glasstec 2018
As a global industry leader in supplying quality materials and technologies for large area coating applications, Materion Advanced Materials is looking forward to meeting you at the 25th Annual Glasstec Conference.
Advanced glass care: Unelko's coating technology soon to be available in SA
FG Trading is set to bring an exciting new range of high-performance glass cleaners, coatings and treatments to the local market, having recently partnered with Unelko Corporation to become their Southern African distributor.
Die Welle
Die Welle (German for ‘The Wave’) is an S-shaped building in the heart of Vienna.

From industry

Is Kuleleri, Kule: 2, Kat: 22, 4. Levent
34330 Levent-Istanbul/İstanbul
Turkey

Portuetxe bidea 18
20018 San Sebastián (Gipuzkoa) Guipúzcoa
Spain

40 Corniche El-Nil,
Al Sharafain Tower Maadi,
Cairo Governorate
11728
Egypt

NEWS RELATED PRODUCTS

Unelko Corporation
Diamon-Fusion International, Inc.
Diamon-Fusion International, Inc.
Diamon-Fusion International, Inc.
Diamon-Fusion International, Inc.

Add new comment