One kind for an adjustable helmet display optical system diopter

The present invention provides an optical system for helmet visual display adjustable degree, including eyeglass lens and a relay lens group shape, like spectacle lenses placed in front of the human eye, a relay lens group disposed microdisplay spectacle lens form between the inner surface; relay lens group to the image light transmitted HMD microdisplay emitted onto the inner surface of the shaped spectacle lens, spectacle lens and then reflected light like the human eye; the image relay lens group microdisplays into a real image between the spectacle-shaped lens and a relay lens group, spectacle shaped lens real image to a magnified virtual image to the human eyes; through the relay lens group itself zoom such that the virtual generated image distance of the human eye according to visual acuity user's changes, so that the normal, human eye myopia and hyperopia eye can see the image of the microdisplay; using the relay lens group to achieve an imaging lens 6 and the zoom relay lens group to reduce the complexity of the structure is simplified.