Head-mounted display with image generator, fold mirror and mirror for transmission to the eye position of the user

Immersive head-mounted on-axis display apparatus for a user in an environment which provides environmental light, comprising:

• an image generator which outputs image light, said image generator defining an output plane;;
• a first partially reflective mirror positioned to receive image light from the image generator and to reflect at least a first portion of said image light in a first direction, wherein said image light impinges said first mirror at an angle of between about 40.degree. and about 50.degree.;
• a second mirror defining a mirror centroid situated to receive at least some of said first portion of said image light from said first mirror and reflect at least a second portion of said image light to provide second reflected light, wherein said second reflected light is provided substantially without combination with said environmental image light, a tangent plane of said second mirror, at said centroid, positioned at an angle of between about 85.degree. and about 95.degree. with respect to said output plane of said image generator, and wherein at least some of said second reflected light is transmitted through said first mirror in a second direction for ultimate transmission to the eye position of the user, providing an optical path from said image generator to said first mirror, to said second mirror, through said first mirror and to said eye position of the user.