Patent ID: 6919976

Claim:
An information display device comprising: an image display member which displays images; a prism having at least two reflecting surfaces arranged in facing each other, and a hologram surface formed of a reflection-type hologram, and at least one of the two reflecting surfaces arranged in facing each other is a light-beam-selective surface which selectively transmits or reflects light; and a deflection correction member for correcting deflection of external light transmitted through the prism, the deflection correction member being adjacent to the prism at the hologram surface, the deflection correction member including two surfaces, each of the two surfaces being coplanar with a corresponding one of the at least two reflecting surfaces, wherein an image light beam that corresponds to image information and that exits from the image display member is reflected between the two reflecting surfaces arranged in facing each other, and is diffractively reflected on the hologram surface, and then, after being transmitted through the light-beam-selective surface, is directed to an observer's pupil, and wherein only the hologram has optical power.