Patent ID: 7764440

Claim:
A dual focal length optical system comprising: a first optical system positioned along an optical axis, the first optical system including an optical structure formed from a solid refractive optical material, the optical structure having an object side surface and an image side surface, the object side surface and the image side surface including a refractive surface portion for transmitting light through the surface and a reflective surface portion for reflecting light incident on the surface from within the optical structure, the first optical system having a first image sensor positioned at a first image plane and having a first focal length; and a second optical system positioned on the same optical axis, the second optical system including one or more components located in a cavity within the optical structure and having a second image sensor positioned at a second image plane located within the cavity, the second optical system having a second focal length, the first focal length being longer than the second focal length, wherein the first optical system forms an image on the first image sensor using light incident on an outer region of the object side surface and the second optical system simultaneously forms an image on the second image sensor using light incident on a central region of the object side surface.