WEB INSPECTION
‘Coated films are important parts of the battery cells and need to be inspected for thickness and related defects before moving into the next steps’
automotive displays and electronics; microdisplays; and the fabrication of integrated circuits. “Glass producers are developing the high-
EyeC’s ProofRunner Wide Web system uses an 8k colour line scan camera to deliver ultrafast and precise 100% real-time print inspection in wide web applications ranging from 900-1,700mm
Since then, the partners (consisting of Chromasens, the Fraunhofer Institute for Casting, Composite and Processing Technology IGCV and SGL Carbon) have gone on to develop the Air Carbon III to achieve improved automatic monitoring of carbon fibre production. Te new system relies on Chromasens’
allPIXA wave line scan camera and Corona II LED line scan light to achieve seamless and continuous surface monitoring. Te Corona II is capable of delivering up to 3,500,000 lux, which is essential for producing high-contrast images of deep-black materials such as carbon fibre. Te Air Carbon III can detect protruding filaments, lint, and similar foreign bodies, and distinguish each type of defect. Te significantly higher resolution of the CMOS colour line sensor, rather than conventional CCD sensors, is what makes
the detection of protruding filaments possible, which range from 7-12µm in diameter. Since the sensors are limited in their measurement width, a novel optical concept was designed and implemented that triples the camera's field of view while keeping the data volume the same. Te system was designed primarily for large-format line sensors (up to 85mm), but it is easily transferable to smaller sensors or area sensors. Tis makes the solution particularly suitable for scaling, as additional hardware costs on the camera side and for computing capacity can be avoided. Overall, the partners succeeded in
developing an inline monitoring system with which carbon fibre production can be continuously and automatically monitored. As of August 2022, the partners were in the final phase of development, carrying out tests in the pilot plant of SGL Carbon and evaluating the data.
Ultra-thin glass manufacturing on the rise In the glass industry, the demand for glass wafer material – the production of which can be monitored using web inspection solutions – is rising rapidly across a range of industries. Glass wafers are very thin sections of
Teledyne Dalsa recently launched AxCIS, a new
family of high-speed, high- resolution fully integrated line scan imaging modules suited for web inspection
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glass material. Tey can be made from a range of materials including quartz, borosilicate glass, or fused silica, and are used in a wide variety of applications, such as 3D imaging and sensing; wafer- level packaging; micro-electromechanical systems (MEMS); microfluidics;
scale industrialisation of new ultra-thin glasses for foldable applications or wafer applications,” says Bertrand Mercier, Vice President of Isra Vision’s Glass Business Unit. “Roll-to-roll glass processes are becoming more and more a reality and could open up new markets. Complex shapes are also increasingly required, such as for automotive displays.” Taking this last example, attractive
automotive glass can only be achieved when there are no optical distortions in the glass wafer. A glass inspection system, such as those offered by Isra Vision, must therefore distinguish between flawless and waste products in order to guarantee the highest level of quality. “Beside the detection of typical ‘visible
defects’, functional defects such as surface contamination or microscopic defects are gaining in importance,” says Mercier. “In addition, measurement of physical properties such as curvature, thickness and stress are becoming standard in modern factories.” Te use of glass wafers with new and
advanced optical properties is also increasing in the production of TVs and smartphones. Here the wafers offer high transparency, high heat resistance and low thermal expansion. For smartphones in particular, glass wafers are often used to protect the sensors, electronics and semiconductors present in the device. Isra Vision’s Flat Panel Master is an
example of the firm’s systems seeing successful adoption in the inline inspection of thin glass substrates. Te system can detect and classify even the tiniest of defects on the surface or edge of glass substrates, while also monitoring particle contamination. At the same time, it collects and analyses inspection data to provide insights into defect causes, allowing users to improve their production processes. In addition to thin glass, the Flat Panel Master can also be used for inspecting float glass, pattern glass, automotive glass and solar glass. O
APRIL/MAY 23 IMAGING AND MACHINE VISION EUROPE 27
EyeC
Teledyne Dalsa
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