VIRTUAL IMAGE DISPLAY APPARATUS

摘要

A light guide member includes four or more curved surfaces (in a case of FIG. 1, a first surface to a fourth surface) having three or more non-axisymmetric curved surfaces so that sufficient aberration correction becomes possible and video having a wide viewing angle and high performance can be displayed. Besides, in the inside of the light guide member, since the length of an optical path can be sufficiently ensured even in a case of a small optical system by reflection of video light GL being performed four times, an entire apparatus can be small in size and light in weight. Further, the video light is displayed to an observer on a divergent optical path which does not allow an intermediate image to be formed in an enlarged manner so that optical design becomes easy compared to in a case of allowing an intermediate image to be formed.

主权项

1. A virtual image display apparatus comprising:
a video element which generates video light; and a light guide member which includes four or more curved surfaces including three or more non-axisymmetric curved surfaces, wherein the video light emitted from the video element and passing through the light guide member is displayed to an observer on a divergent optical path in an enlarged manner, and the light guide member includes at least three surfaces of a first surface, a second surface, and a third surface as the four or more curved surfaces, reflection of the video light is made four times by four surfaces different from one another in the inside of the light guide member, total reflection is performed on the third surface as a second reflection among the four times of reflections, total reflection is performed on the first surface as a third reflection, reflection is performed on the second surface as the fourth reflection, and the video light reaches the eyes of the observer by being transmitted through the first surface.