Patent ID: 8662765

Claim:
A fixed position optical system, comprising: a first lens and a second lens having respective object side and image side surfaces, wherein at least one object side surface or at least one image side surface of the first lens or the second lens is an aspheric surface; the first lens or the second lens comprising a compound lens including a plurality of optical elements bonded together, the plurality of optical elements comprising at least two optical materials having disparate index of refraction or disparate Abbe number; wherein: the fixed position optical system has a total track length equal to or less than 5.0 millimeters, and the first lens is a compound lens including a first optical element bonded to an object side surface of an optical plate and a second optical element bonded to an image side surface of the optical plate, the first optical element is comprised of a first replication material having an index of refraction between substantially 1.45 and substantially 1.6, and an Abbe number in a range between substantially 50 and substantially 60.