A helmet mounted display system comprising an eyepiece (3) through which a wearer of the helmet directly views a forward scene (13). The eyepiece also serves to combine an intensified image of the forward scene with the wearer's direct view of the scene. The intensified image is produced by an optical...http://www.google.com.au/patents/US5459612?utm_source=gb-gplus-sharePatent US5459612 - Display system
