DISPLAY SYSTEM INTENDED TO BE ATTACHED TO THE HEAD OR TO A HELMET, AND A HELMET PROVIDED WITH SUCH A DISPLAY SYSTEM

摘要

The invention relates to a display system intended to be attached to the head or to a helmet. The system comprises at least an image intensifier unit having an input on which an image can be projected and an output which retransmits the projected image with an enhanced intensity and within at least one predetermined first frequency band. The system further comprises an eyepiece which is composed of a first and second transparent reflecting element having angle- and frequency-dependent reflectance and transmittance properties, said properties, in combination with the said first frequency band, resulting in the intensified image emerging via the eyepiece. The display system is further provided with an image display device which transmits a visible video image in the direction of the eyepiece. The said properties of the eyepiece in combination with the said second frequency band results in the video image emerging via the eyepiece and within at least a predetermined second frequency band, in a direction which is at least virtually identical direction to that of the intensified image.