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New surface roughness analyzer

Source:Food Bev Asia Release Date:2019-02-20 124
Food & Beverage
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From KRÜSS, the Surface Roughness Analyzer (SRA) is a confocal microscope for optical analyses of surface textures. It can be used as a lab instrument, and as a measuring head for automatic processes in the production line.  

THE NEW Surface Roughness Analyzer – SRA precisely pictures the topographic condition of a surface and provides information for optimizing the material or production process. It delivers a high-resolution, 3D image of a sample’s surface and the exact description of its topography. The machine does so fast and without contact with the surface. The information can help to evaluate the contribution of roughness to the wettability of a sample or to the adhesion of coatings.

Technical innovations for precision and speed

Confocal microscopy is the technique used to create the spatial representation of the surface which means layers of 2D images are stacked, each one with a very small depth of focus, while lowering the optics with extremely tiny increments, leading to a height resolution of down to 10 nanometres.

To scan an area of the sample, usual confocal microscopes use a rotating pinhole disk to create an image at each height level. The disk inside the SRA has micro lenses instead of just holes, increasing the light yield and making it possible to analyse low-reflectivity or even transparent surfaces.

The vertical transport of the measuring head uses an ultrasonic instead of a common piezo drive. Thus, while combining speed with a high resolution, the usual height range of the measurement is widely exceeded. To reach a vast scope of tasks from roughness analysis to imaging the exact shape of whole products such as screws or tooth implants, lenses with magnifications from 2.5 to 100-fold can be exchanged quickly and easily.

Measuring head for robotic systems – ready for in-line quality control

With its small size and low weight, the SRA can be used at almost any place as a lab instrument, but is also available as a measuring head to be used for automatic processes in the production line. This makes real-time sample evaluations for QC checks of work pieces possible. Adding to the versatility of the SRA itself, the software can be linked to programs such as Matlab® in order to integrate it in information systems.

KRÜSS will also present the instrument together with other solutions in the area of non-destructive surface analysis at the Control trade fair from May 7 to 10 in Stuttgart (Germany): Hall 6, Stand 6419.

 

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