Patent ID: 7224542
Filing Date: 2007-05-29
Classification: G02B

Abstract:
1. A lens unit formed such that a lens system formed of at least two lenses is assembled into a lens holder, wherein a lens positioned at least at one end comprises: an effective portion; a peripheral edge portion provided around a periphery of the effective portion, wherein a face facing an inner side of the lens system is a planar face intersecting an axial direction; and a rib portion that is provided around a periphery of the peripheral edge portion, that has a face facing an outer side of the lens system as being a planar face intersecting the axial direction, and that has a thickness reduced to be thinner toward an outer side, wherein: an outer side face parallel with the axial direction is provided around the periphery of the peripheral edge portion; the rib portion has a maximum thickness less than a thickness of the peripheral edge portion, has a face facing an inner side of the lens system which slopes toward a periphery of the lens system in an outer side direction, and is positioned closer to an outer side of the lens system than the outer side face; and adhesive adheres to the lens holder, the outer side face of the peripheral edge portion, and a face facing an inner side of the lens system of the rib portion.