Measuring 3D curved glass with FocalSpec sensors
3D topography imaging with FocalSpec Line Confocal Imaging (LCI) sensors fits particularly well for the surface inspection and roughness measurement of challenging materials such as shiny, glossy or transparent surfaces. Measuring 3D curved glass with the traditional imaging technologies can be very challenging but, in addition to flat surfaces, LCI technology is suitable for illustrating the topography of curved glass for up to 20 degrees of surface angle. In case of higher angles, the sensor or the sample should be tilted or illustrated with another FocalSpec sensor.
Picture 1: Mobile phone 3D curved glass illustrated with LCI1200 sensor
Picture 2: Partial enlargement showing defects on mobile phone screen in Picture 1.
The combination of 3D tomography and 2D intensity imaging can be used for identifying defects such as delamination, scratches or dust on the surface or inside the transparent multilayer material. Contrary to various other types of imaging systems, FocalSpec technology helps not only seeing the location of the defect, but also identifying in which layer the defect is. Also the dimensions of the defect can be detected.
Picture 3: Mobile phone display layers illustrated with LCI1201.