US Patent 9297512 Light flux controlling member, light emitting device and illumination apparatus

Incidence region 162 of light flux controlling member 160 includes first lens region 10 and second lens region 50 which have a fan shape in a plan view thereof. First lens region 10 includes a plurality of first projections 172. In first inclining surface 174 of first projection 172, angle θ11 on a first cross section and angle θ21 on a second cross section in a direction orthogonal to the first cross section are both larger than 0°. In second inclining surface 176, angle θ12 on the second cross section is larger than angle θ22 on the second cross section.