Free curved surface bifocal monocular stereoscopic head mounted display device

The present invention provides a stereoscopic real face helmet bifocal monocular display device comprising a first optical surface and second optical surface of prism prism surface may be spherical, aspherical or free-form surface, each prism comprising three optical surfaces ; and a display section, comprising a first and a second microdisplay microdisplays. A first optical surface and a first prism constituting a first micro display displays a focal plane, a second optical surface and a second prism constituting a second microdisplay focal plane display, respectively generate a close eye distance (remote) and far ( close) and watching the fusion to generate an observation image having a real stereoscopic image through the depth. The monocular of the present invention bifocal face helmet display apparatus compact, light weight, especially for a stereoscopic head mounted display device, a stereoscopic head mounted display consistent with human natural vision, focusing and convergence inconsistencies display conventional stereoscopic helmet, solve comfort problems, relieve visual fatigue.