Patent ID: 8270087
Filing Date: 2012-09-18
Classification: G02B

Abstract:
1. A head mounted display comprising: a display part which is configured to reflect an image light corresponding to an image signal on a half mirror included in the display part and to allow an external light to pass through the half mirror thus allowing the image light and the external light to be incident on an eye of a user whereby an image corresponding to the image signal is displayed in a superposed manner with scenery, wherein the display part comprises: the half mirror is formed by stacking a dielectric film and a metal film to a plate-shaped resin member, and the half mirror is configured such that while reflectivity of a P-polarized light and reflectivity of an S-polarized light do not agree with each other in at least a partial band of a visible band which contains the three specified wavelengths which form the image light, the reflectivity of the P-polarized light and the reflectivity of the S-polarized light are set approximately equal to each other with respect to at least the three specified wavelengths, and an average value of transmittance of the P-polarized light and transmittance of the S-polarized light with respect to the respective wavelengths in the visible band which contains the three specified wavelengths is suppressed to a value which falls within a regulated range in the whole visible band.