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How Focus Variation Technology Works

Bruker's LightSpeed focus variation technology uses optical objectives with a fixed focal distance and a very shallow depth of field to vertically scan a sample surface with topography. Because of the shallow depth of field, only a small plane of that surface will be in focus at any point in time.



  • Contour LS-K takes multiple images as the objective is moved toward the sample, and each image is logged (A).
  • By knowing the point in the scan where the image was taken, we know the distance between the objective and the surface. Once the scan is complete, proprietary algorithms analyze the data from each image to find the optimum focus for each pixel in the field of view (B).
  • This 3D data is available to display and to conduct any one of a number of analyses (C).



With advanced automation and stitching routines, the process can be automatically repeated to cover even large surfaces or multiple specific areas of a part. The data are then collected and presented as one homogeneous dataset for further inspection and analysis. Most importantly, unlike with competing systems, Contour LS-K with LightSpeed Focus Variation Contour captures the raw metrology data, allowing the user to truly see what is on the inspected surface, in both real color and exact measurable detail.

Focus Variation Optical Profiler
Focus Variation Profiler Software Panel

An intuitive visual workflow, extensive user-customization features, and automated functions provide the fastest, most comprehensive data collection and analysis available for a vast range of research and production applications.

Advanced Software Makes Metrology Simple

Built on decades of Vision64® software innovation, Contour LS-K systems feature proprietary software algorithms for data processing, analysis and visualization. A state-of-the-art user interface provides unique features to simplify the measurement setup and reduce the time to acquire high-quality surface data. Icons guide the user from measurement setup through stitching, automation, reporting, and other functions.

Unique scan automation graphics allow the operator to quickly establish scan range and optimum lighting. While in measurement mode, a real-time, real-color image is displayed to simplify locating the target, and one-click analysis reduces a routine’s start-to-finish time to a matter of seconds.