Protective mask, in particular diving mask, with optical display system

A protective mask, in particular a diving mask, comprising:

• a frame able to be mounted on the face of a user;
• a window carried by said frame;
• an optical display system, which comprises:
• a display capable of projecting an image, and
• a prism capable of receiving said image from said display and forwarding it;
• characterized in that;
• the prism has a first active face and a second active face and a basal face;
• the window is a flat window that, on the internal face thereof, has a reflection area;
• and
• said display and said prism are configured and disposed so that:
• said display projects said image onto the first active face of the prism,
• the image passes through the prism and is reflected by the basal face of the prism towards the second active face,
• the image is projected from said second active face of the prism onto said reflection area of said window
• said window sends said image into the eye of the user, and
• a lens is placed on the optical path between the prism and said reflection area, wherein one of the display and the prism is fixed to the internal face of the window, whereas the other one of the display and the prism is fixed to the frame.

A single-piece optical system for a protective mask, said protective mask comprising a frame suitable for being mounted on the face of a user and a window carried by said frame, said single-piece optical display system comprising;

• a display capable of projecting an image;
• a prism capable of receiving said image from said display and sending said image in the direction of the window, said prism having a first active face and a second active face;
• a lens placed on an optical path between the prism and a reflection area;
• and
• means for attaching to the frame or the window of said mask, one of the display and the prism is fixed to the internal face of the window, whereas the other one of the display and the prism is fixed to the frame.