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Variable diameter CO<sub>2</sub> laser ring-cutting system adapted to a zoom microscope for applications on polymer tapes.
Applied Optics 2016 November 21
This paper presents the conception and implementation of a variable diameter ring-cutting system for a CO<sub>2</sub> laser with a working wavelength of 10.6 μm. The laser-cutting system is adapted to an observation zoom microscope for combined use and is applicable for the extraction of small circular areas from polymer films, such as forensic adhesive tapes in a single shot. As an important characteristic for our application, the variable diameter ring-cutting system provides telecentricity in the target area. Ring diameters are continuously tunable between 500 μm and 2 mm. A minimum width of less than 20 μm was found for the ring profile edge. The basic characteristics of the system, including telecentricity, were experimentally evaluated and demonstrated by cutting experiments on different polymer tapes and further exemplary samples.
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