Surface inspection
Perfect measurement of glass displays
Isra Vision is presenting new versions of the deflectometry system for measuring reflective surfaces at Control. The measurement technology for glass displays and shiny components provides data for product and process optimization, even for curved components.
Worldwide sales of tablets, smartphones and smartwatches amount to billions of devices every year. To ensure a flawless aesthetic impression and the correct functioning of touch surfaces, each individual display must be checked for defects. Now, new variants of a deflectometry system for measuring reflective surfaces offer precise inspection of curved display and cover glass. Housing components, curved car interior elements and painted components are also included in the scope of application.
The new system variants of the Specgage3D measure reflective and transparent surfaces using the incident light (curved type) or transmitted light (transmission type) method. Up to twelve cameras observe the reflected and distorted fringe images on the object, which are projected onto the test surface by an LCD display. The object geometry is reconstructed solely from the recorded image sequence using photogrammetric methods.
Curved displays in particular can be inspected right up to the edges. In addition to defects on the substrate surface, the transmitted light method for transparent objects also detects inclusions and defects in the glass as well as defects that cause distortions simply by varying the refractive power. Collected inspection data serves as a basis for adjusting process parameters during glass treatment such as temperature, bending speed, cooling time and similar factors to an optimum. As a result, users achieve high product quality and sustainably reduce production waste.
Rejected defective products save costs and material compared to the final inspection: they do not consume any additional components and do not require any further production capacity. Comprehensive quality control also prevents customer complaints as well as cost-intensive damage to the production system. as
Hall 4, Stand 4106
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