Patent ID: 7268956

Claim:
A dual viewpoint solid catadioptric lens comprising: a first spherical refractive surface S 1 having a center C 1 located on an optical axis of the lens and having a radius r 1 ; a second spherical refractive surface S 2 having a center C 2 located on the optical axis of the lens and having a radius r 2 , wherein r 2 is less than r 1 ; a first ellipsoidal reflective surface E 1 having foci F 1 and F 1 ′ on the optical axis of the lens, wherein F 1 =C 1 ; a second ellipsoidal partially reflective surface E 2 having foci F 2 and F 2 ′ on the optical axis of the lens, wherein F 2 =C 2 , and wherein F 1 ′=F 2 ′, whereby C 1 and C 2 provide dual viewpoints for the lens.