Patent ID: 8854735

Claim:
A virtual image display system comprising: an image display device that forms image light; a projection system that allows the image light output from the image display device to enter; a light guide member having an integrated block shape that has a light guide part, a light-incident part allowing the image light from the projection system to enter the light guide part, and a light-exiting part that outputs the image light guided by the light guide part to the outside, and enables observation of the image light via the light-exiting part; and a light transmission member that enables observation of external light by being combined with the light guide member, wherein the light guide part has a first reflection surface and a second reflection surface that are provided in parallel to each other and enable light guide by total reflection, the light-incident part has a third reflection surface at a predetermined angle with respect to the first reflection surface, the light-exiting part has a fourth reflection surface at a predetermined angle with respect to the first reflection surface, a half mirror is provided on the fourth reflection surface, and the light transmission member includes a see-through aiding part at least having a first surface provided in parallel to a transmission surface opposed to the fourth reflection surface and the second reflection surface, and a light blocking part that is provided nearer a light guide direction side of the light guide member than the see-through aiding part and prevents visible light from the light transmission member from being guided to the light guide member once the visible light passes through the fourth reflection surface.