Patent ID: 8337015

Claim:
A spectacles-mounted image display device, comprising: an image output unit including a display element that displays an image and is disposed on a frame of spectacles; and a reflection unit that is disposed adjacent to at least one of spectacle lenses of the spectacles and is configured, when a viewer wears the spectacles, to reflect image light that is output from the image output unit toward an eyeball of the viewer so that the viewer can see a virtual image of the image, wherein the reflection unit is a reflection member having a positive refractive power, and wherein an effective luminous flux that is output from the image output unit and reaches the eyeball of the viewer is configured so that, in a cross section that includes an optical axis, a width of the effective luminous flux perpendicular to the optical axis is smallest at the reflection unit in comparison to widths of the effective luminous flux perpendicular to the optical axis at positions other than the reflection unit.