| 摘要 |
The invention concerns an apparatus for inspecting a surface, in particular the surface of a mill roll, comprising a housing wherein are arranged means for transmitting and receiving a light beam, and an optical coupling device arranged on the outer surface of a front wall of the housing. The optical coupling device comprises: (a) a component ( 5 ), called fluid dispenser, (b) a hollow cylindrical nozzle ( 11 ), and (c) a mobile tubular component ( 16 ), successively traversed by the light beam. The mobile tubular component ( 18 ) is arranged partly inside the cylindrical nozzle ( 11 ), so as to be able to slide inside said cylindrical nozzle, and partly exits therefrom in the extension thereof, towards the surface to be inspected ( 2 ). Different cross-sections (shoulders 14, 19 ) are provided in the cylindrical nozzle ( 11 ) and in the mobile tubular component ( 16 ), in particular for limiting said sliding movement. The mobile tubular component ( 16 ) is positioned in the cylindrical nozzle by the sole effect of the coupling fluid pressure on its end surfaces. The device can further comprise means ( 21, 22 ) for preventing the rotation of the tubular component ( 16 ) about its longitudinal axis. |
