Optical Profiler Basics Advantages of Optical Profilers: • Optical profiling, as opposed to stylus profiling, is non-contact. • Optical profilers measurements are three dimensional: they measure height (the Z-axis) over an area of X and Y lateral dimensions. Stylus profilometers are inherently linear (2 dimensional). A stylus is dragged across the surface, sampling points along a line. • Every pixel in the imaging camera is a datum: its optical path difference is calculated relative to each adjacent pixel, by comparing the contrast between them. So, the more pixels in the field of view, the more data you get in each measurement. • Stylii wear out, or need to be changed for varying surface conditions. Optical profilers have no stylus, and no expensive 'consumable' parts to replace. • Since reliable coupling of focus with interference contrast is essential to repeatable surface metrology, our interference microscopes come with our own athermal objectives: offering better...

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