Patent ID: 8511876

Claim:
An on-axis monolithic ellipsoidal lens system, comprising: a monolithic lens body, said lens body having an optical axis, having a first side facing an object focal point on said optical axis, and having a second side opposite said first side facing an image focal point on said optical axis; wherein said first side has a circular light entry surface portion symmetrically arranged around and centered on said optical axis and a light reflecting annular surface portion symmetrically arranged around said light receiving circular portion and centered on said optical axis; wherein said second side has a circular light exiting surface portion symmetrically arranged around and centered on said optical axis and a light reflecting annular surface portion symmetrically arranged around said light exiting circular portion and centered on said optical axis; wherein light from the focal point enters said lens body via said light entry surface portion, is reflected off of the light reflecting annular surface portion of the second side to the light reflecting annular surface portion of the first side without exiting from the lens body, and is reflected off of the light reflecting annular surface of the first side so as to exit the lens body via the light exiting surface portion; and wherein said exiting light is focused on the image focal point.