Patent ID: 8570656

Claim:
A see through optical system comprising: a fold mirror and a beam-splitter to view an outside world; said beam-splitter introduces an image collimated by a non-conformal concave mirror forming a collimated virtual image; and wherein both an outside light and said collimated virtual image can be observed by an observer's eye simultaneously; wherein said collimating element passes a majority of visible light and reflects a small wavelength; a remaining portion of said visible light encounters said fold mirror; said fold mirror reflects said remaining portion of said visible light towards an interference notch beam splitter wherein said remaining portion of said visible light is reflected towards and is observed by said observer's eye; a light source emits a source light through a field lens and said source light is incident upon said interference notch filter; a first portion of said source light is reflected by said interference notch filter; a second portion of said source light is transmitted by said interference notch filter toward said mirror; said transmitted portion of said source light is reflected by said fold mirror towards said non-conformal notch collimating element; said transmitted portion of said source light is reflected by said non-conformal notch collimating towards said fold mirror and is incident upon said interference notch beam-splitter; a first portion of said transmitted portion of said source light is transmitted by said interference notch beam-splitter; a second portion of said transmitted portion of said source light is reflected towards and is observed by said observer's eye.