Patent ID: 8262272
Filing Date: 2012-09-11
Classification: F21V,F21W,F21Y,G02B

Abstract:
1. An optical lens comprising: an array of lens units, each lens unit comprising a main body, a light diverging portion and a light converging portion, the main body comprising a light incident surface and a light emitting surface opposite to the light incident surface, the light diverging portion being configured for expanding a light field along a first direction, the light converging portion being configured for compressing a light field along a second direction, the light diverging portion and the light converging portion being formed on at least one of the light incident surface and the light emitting surface, the light converging portion comprising a plurality of parallel recesses distributed along the second direction; wherein the light diverging portion is a concave cylinder portion that extends along the second direction, and the light converging portion extends parallel to the first direction; wherein light enters the light incident surface along a third direction and is expanded in the first direction by the light diverging portion and compressed in the second direction by the light converging portion; and wherein every two of the first direction, the second direction and the third direction are perpendicular to each other.