Illumination optical device and virtual image display

摘要

An illumination optical device includes a light source, a light pipe guiding illumination light from the light source, a diffuser arranged on an emitting surface side of the light pipe. A width of the emitting surface of the light pipe in the horizontal direction is set greater than a width of an illuminated object, and a width of the emitting surface of the light pipe in the vertical direction is set smaller than a width of the illuminated object.

主权项

1. An illumination optical device comprising:
a light source; a light pipe consisting of a single light pipe configured to guide illumination light from said light source, the light pipe having an emitting surface, the emitting surface having:
(a) a light emitting surface height;(b) a light emitting surface width; a diffuser arranged on an emitting surface side of said light pipe; and an illuminated object including an illuminated object surface facing the emitting surface and having:
(a) an illuminated object surface height in a direction corresponding to the light emitting surface height; and(b) an illuminated object surface width in a direction corresponding to the light emitting surface width, wherein: the light emitting surface height is set greater than the illuminated object surface height, and the light emitting surface width is set smaller than illuminated object surface width.