| CPC G02B 13/0045 (2013.01) [G02B 7/021 (2013.01)] | 18 Claims |

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1. A lens assembly, comprising:
a lens having a length in a first direction, perpendicular to an optical axis, shorter than a length in a second direction, perpendicular to both the optical axis and the first direction, on a plane perpendicular to the optical axis; and
a lens barrel accommodating the lens, and having an opening in a side of the lens barrel,
wherein a linear side of the lens facing the first direction is entirely exposed within the opening in the side of the lens barrel.
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