VIRTUAL IMAGE DISPLAY APPARATUS

摘要

A virtual image display apparatus includes a first light guide that not only causes a display light flux incident through a first light incident surface to repeatedly undergo internal reflection to travel in a first direction away from the first light incident surface but also causes part of the display light flux to exit to the outside through areas of a first light exiting surface that is at least one of interfaces with the outside and extends in the first direction, a first light-incident-side diffraction grating that diffracts light incident thereon to cause the diffracted light to enter the first light guide, and a first light-exiting-side diffraction grating that diffracts light incident from the first light guide.

主权项

1. A virtual image display apparatus comprising:
a first light guide that not only causes a display light flux incident through a first light incident surface to repeatedly undergo internal reflection to travel in a first direction away from the first light incident surface but also causes part of the display light flux to exit to the outside through areas of a first light exiting surface that is at least one of interfaces with the outside and extends in the first direction; a first light-incident-side diffraction grating that diffracts light incident thereon to cause the diffracted light to enter the first light guide; and a first light-exiting-side diffraction grating that diffracts light incident from the first light guide.