Patent ID: 9157607
Filing Date: 2015-10-13
Classification: F21V,F21Y,G02B

Abstract:
1. An light control lens, comprising: a light emitting surface being an aspherical surface and satisfying the following condition: a light incident surface opposite to the light emitting surface, the light incident surface constituting a cavity having an opening, wherein, a center of the opening represents an incident origin; L a total internal reflection (TIR) inclined surface opposite to the light emitting surface, and at a peripheral side of the light incident surface; wherein, an included angle α between the TIR inclined surface and a plane perpendicular to the optical axis is less than 45°; wherein the light incident surface includes: a first optically active area, being disposed at a center of the light incident surface, wherein the first optically active area comprises a second recession portion; a second optically active area, being connected with a periphery of the first optically active area; and a second optical path conversion point disposed at a junction between the first optically active area and the second optically active area; wherein the light incident surface satisfies the following conditions: wherein, the effective radius of the light emitting surface is larger than a distance from an arbitrary point on the light emitting surface to a plane through the incident origin and perpendicular to the optical axis along the optical axis direction; wherein, when a light beam enters the light control lens through the light incident surface, and then is incident at the light emitting surface, at least a part of the light beam reflected from the light emitting surface is totally internally reflected by the TIR inclined surface, and then passes through the light control lens.