Patent ID: 7542209

Claim:
An apparatus comprising: an image formation device comprising a plurality of pixels selectively adjustable for producing spatial patterns; imaging optics defining an optical path, said imaging optics comprising: a lens group comprising a plurality of lens elements in said optical path, said lens group having a first optical axis, each of said plurality of lens elements having optical axes collinear with said first optical axis; and a single lens element in said optical path having a second optical axis that is different from the first optical axis; an off-axis combiner in said optical path; and a support structure configured to be worn on the head of a wearer and to dispose the combiner in front of the eye of the wearer, wherein said single lens element has positive optical power and is the only lens element in said optical path between said lens group and said combiner that has an optical axis collinear with the second optical axis; and wherein the apparatus does not include a mirror between the image formation device and the imaging optics.