Virtual image display system

摘要

A thickness of a tapered part provided at the deeper side (−X side) in a light guide direction of a light transmission member is smaller toward the deeper side, and thus, a reflection angle of ghost light that has passed through a fourth reflection surface provided with a half mirror layer and reached the light transmission member gradually becomes smaller within the tapered part and no longer satisfies a total reflection condition, and the light is ejected to the outside in the position diverging from an eye of an observer. That is, the tapered part may prevent the ghost light from reaching the eye and good see-through observation can be realized.

主权项

1. 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.