| 摘要 |
The device enables the removal of a superficial layer from a component 1 by an abrasive tool 2 to be monitored. A light source 10 illuminates the component to be monitored through an optical fibre 5 and an opening 3 made in the tool. The reflected light, after passing through the same opening, is sent to a photoelectric sensor and this delivers an electrical signal which is an image of the condition of the surface of the component to be monitored. This image can be compared with a reference 13 so as to interrupt the operation of the tool when enough of the surface layer has been removed. <IMAGE>
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