Patent ID: 8358254

Claim:
Helmet position detection system for aircraft including a helmet comprising: a helmet display having a fixed visor used as an optical mixer, the helmet display displaying an image, a substantially spherical mobile visor that is able to occupy a position of use and a stowage position, the mobile visor being arranged in front of a pilot's eyes and adjacent the fixed visor in the position of use, wherein the helmet comprises detection means for detecting the position of the mobile visor, and the helmet position detection system detects an orientation of the helmet corresponding to the pilot's line of sight and applies an angular correction to the orientation of the helmet when the mobile visor is detected in the position of use by the detection means, without shifting the image displayed by the helmet display, and the helmet position detection system does not apply the angular correction to the orientation of the helmet when the mobile visor is detected in the stowage position by the detection means, wherein the angular correction is determined by a deviation in the line of sight when the mobile visor is in the position of use and the angular correction is recorded in the helmet position detection system.