| 摘要 |
A lens array includes: a substrate (31) in which a plurality of through holes (34) are formed; and a plurality of lenses (32) provided in the substrate by filling the plurality of through holes respectively. A protrusion portion (36) that is opaque to an incident light is provided in the through hole as an aperture, which cuts off a light incident on parts except an opening portion. And, the protrusion portion extends from an inner wall of the through hole toward an optical axis of the lens in one planar surface, which is perpendicular to the optical axis of the lens buried in the through hole, to constitute the opening portion around the optical axis.
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