This model is equipped with a newly-developed dual confocal system that enables measurement of samples conventionally difficult to be measured. The LEXT OLS4000 has enhanced the surface roughness measurement function and achieved output results with the same operability and compatibility as those of a contact surface-roughness measuring machine, while making the most of the non-contact benefits.

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| Razor | Ceramic particle |
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| Stud Bamp | Micro Lens |
