Abstract: The invention concerns an inclination detector comprising a displacement guide, a member mobile along the displacement guide, and means cooperating with the mobile member to control an alarm generator based on the inclination of the displacement guide. The invention is characterised in that said means comprise electrooptical transmitter and receiver for respectively transmitting and receiving an optical beam so as to activate or deactivate the alarm generator when the mobile member obstructs the optical beam by moving along the displacement guide. Preferably, the mobile member as well as the electrooptical transmitter and receiver are arranged in a sealed displacement guide. The inventive detector is fixed to an undergarment enabling a user to acquire and integrate a movement adapted to the spine.

Abstract: A method and apparatus for producing a thin semi-conductor coating on a substrate in a vacuum enclosure, by depositing on the substrate a semi-conductor substance volatilized by a plasma from a source in the enclosure and also depositing on the substrate a metallic doping impurity volatilized by the plasma from another source in the enclosure.