Patent ID: 8351133

Claim:
A 360-degree viewing angle lens unit, from the object side to the image side thereof, comprising: a 360-degree viewing angle lens comprising: an annular incident surface having a positive radius of curvature and symmetrically concentric around an optical axis of the lens unit, the annular incident surface, from the object side to the image side of the lens unit, comprising a first circular edge and a second circular edge; a first reflective surface having a positive radius of curvature and symmetrically concentric around the optical axis of the lens unit, the first reflective surface, from the image side to the object side of the lens unit, comprising a third circular edge and a fourth circular edge; a second reflective surface having a negative radius of curvature, the second reflective surface symmetrically concentric around the optical axis of the lens unit and coaxial with the incident surface, the periphery of the second reflective surface joined together with the first circular edge; an emitting surface having a positive radius of curvature, the emitting surface symmetrically concentric around the optical axis of the lens unit and coaxial with the first reflective surface, the periphery of the emitting surface joined together with the third circular edge of the first reflective surface; and a connecting surface shaped as a substantially plane and defined between the fourth circular edge and the second circular edge; and a relay lens having positive refractive power and aligned with the emitting surface, the relay lens configured for condensing image light output from the emitting surface.