Housing for a vision system

The invention relates to a housing for accommodating a vision system therein, the housing comprising; - a first stationary housing part, - a second housing part gastight coupled with the first stationary housing part for accommodating a vision system in the housing at an overpressure, and wherein the second housing part comprises a transparent portion and the second housing part is moveable coupled with the first stationary housing part for cleaning the transparent portion of the second housing part.