Patent ID: 8253839
Filing Date: 2012-08-28
Classification: G02B,H04N

Abstract:
1. A lens assembly comprising: a first lens comprising an optical axis, a first optical portion and a first non-optical portion surrounding the first optical portion, wherein the first non-optical portion comprises a first protrusion having a first engaging face facing toward the optical axis and a first engaging structure formed on the first engaging face, the first engaging structure comprises a plurality of annular ridges formed on the first engaging face; and a second lens for engagement with and coaxially alignment with the first lens, the second lens comprising a second optical portion and a second non-optical portion surrounding the second optical portion; the second non-optical portion comprising a second protrusion, the second protrusion having a second engaging face facing away from the optical axis and a second engaging structure formed on the second engaging face for engagement with the first engaging structure of the first lens, wherein the second engaging structure comprises a plurality of annular grooves formed on the second engaging face, the second lens is rotatable about the axis but non-movable along the optical axis relative to the first lens when the second lens is engaged with the first lens.