Patent ID: 7085027
Filing Date: 2006-08-01
Classification: G02B

Abstract:
1. An image combiner in which a reflective type holographic optical element is installed, and light from an image forming means and light passing through the main body are superimposed, wherein the light that is emitted from the image forming means has only a single wavelength region component or a plurality of discrete wavelength region components, and the following conditions are established between the angle of incidence at which the principal rays emitted from the center of display part of the image forming means are incident on the surface of the reflective type holographic optical element and the angle of reflection/diffraction: −5<θ1<5, and |θ1−θ2|<3; θ1: the angle of incidence (°) at which the principal rays emitted from the center of the display part of the image forming means are incident on the reflective type holographic optical element; and θ2: the reflection/diffraction angle (°) when the principal rays emitted from the center of the display part are diffracted/reflected by the reflective type holographic optical element.