Enclosed laser directed onto a reflector at the stylus tip.

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Presentation transcript:

Enclosed laser directed onto a reflector at the stylus tip. Renishaw plc 29/05/2019 Enclosed laser directed onto a reflector at the stylus tip. The stylus touches the part and bends. The reflector is displaced The altered return path of the laser is sensed by a PSD The exact tip position is known because the reflector and the stylus ball are close together. Stylus wear is minimised by low scanning force Return path to PSD when stylus deflected. Reflector PSD & Source Transmission & Return path to PSD when stylus NOT deflected. Stylus deflection in operation ~50µm Stylus force ~5g Confidential